EMCOR Group, Inc. (EME) Business

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

Overview

We are one of the largest specialty contractors in the United States and a leading provider of electrical and mechanical construction and facilities services, building services, and industrial services. In 2025, we had revenues of $16.99 billion. Our services are provided to a broad range of commercial, technology, manufacturing, industrial, healthcare, utility, and institutional customers through approximately 100 operating subsidiaries, which specialize principally in providing construction services relating to electrical and mechanical systems in all types of facilities and in providing various services relating to the operation, maintenance, and management of those facilities. Such operating subsidiaries are organized into the following reportable segments:

•United States electrical construction and facilities services;

•United States mechanical construction and facilities services;

•United States building services; and

•United States industrial services.

On December 1, 2025, we sold our United Kingdom operations, the results of which are reported within our United Kingdom building services segment through the date of sale.

Our operating subsidiaries offer comprehensive and diverse solutions on a broad scale and have many long-standing customer relationships. We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, construction managers, developers, property managers, and other subcontractors. We generally provide industrial services directly to refineries and petrochemical plants.

We derive revenues from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2025 revenues, approximately 97% were generated in the United States and approximately 3% were generated in the United Kingdom. In 2025, we derived approximately 72% of our revenues from our construction operations, approximately 21% of our revenues from our building services operations, and approximately 7% of our revenues from our industrial services operations. For additional information regarding our revenues, see Note 3 - Revenue from Contracts with Customers of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

We believe that our range of service offerings, technical capability, skilled workforce, and strong project execution, along with our safety culture and financial resources, differentiate us from our competition and position us to benefit from future capital and maintenance spending by our existing and potential customers. Our strategies of expanding our portfolio of service offerings and increasing or enhancing our presence in core end markets and geographies, along with our commitment to industry-leading best practices and technological and training capabilities, place us in the position to capitalize on opportunities and trends in the industries we serve and continue to grow our business.

Increasingly, our services are focused on delivering sustainable energy solutions, enhancements in energy efficiency, reductions in waste and emissions, and improvements in the safety and comfort of our customers’ facilities.

The broad scope of our operations is more particularly described below. For detailed segment financial information refer to Note 18 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

Operations

Electrical and mechanical construction and facilities services operations:

Our electrical and mechanical construction services primarily involve the design, integration, installation, start-up, operation and maintenance, and provision of services relating to:

•Systems for electrical power transmission, distribution, and generation, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems, and related switch gear and controls;

•Premises electrical and lighting systems, including fixtures and controls;

•Process instrumentation in the refining, chemical processing, and food processing industries;

•Low-voltage systems, such as fire alarm, security, and process control systems;

•Voice and data communications, including fiber optic and low voltage cabling, distributed antenna systems, audiovisual systems, and wireless access points;

•Sustainable energy solutions such as solar, photovoltaic, and wind, as well as the installation of electric vehicle charging stations;

•Roadway and transit lighting and signaling and fiber optic lines;

•Computerized traffic control systems, and signal and communication equipment for mass transit systems;

•Heating, ventilation, air conditioning, and refrigeration, including both traditional mechanical systems as well as geothermal solutions;

•Clean-room process ventilation systems;

•Fire protection and suppression systems;

•Plumbing, process and high-purity piping systems;

•Controls and filtration systems;

•Water and wastewater treatment systems;

•Central plant heating and cooling systems, including manufacturing and installing sheet metal air handling systems;

•Millwright services; and

•Steel fabrication, erection, and welding services.

The electrical and mechanical construction services industry has experienced growth principally due to the increased content, complexity, and sophistication of electrical and mechanical systems resulting, in part, from growth in digital processing, cloud computing, data storage, and the emergence of artificial intelligence (“AI”). In addition, facilities of all types require extensive electrical distribution systems, sophisticated power supplies, networks of low-voltage and fiber-optic communications cabling, and various mechanical, plumbing, and fire protection and suppression systems. Moreover, the need for substantial environmental controls within a building, due to the heightened need to maintain extensive servers at optimal temperatures, and the demand for increased energy efficiency, have continued to expand opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity and, in recent years, has benefited from the expansion of data centers to power AI and cloud computing, the re-shoring of the supply chain, the need for additional high-tech manufacturing facilities, and the energy transition/expansion throughout the United States.

Our electrical and mechanical construction services generally fall into one of three categories: (a) large installation projects, with contracts often in the multi-million dollar range, that involve: (i) the construction of manufacturing facilities, data centers, warehousing and distribution facilities, hospitals, and commercial buildings, (ii) institutional, public works, and infrastructure projects, or (iii) the fit-out of large blocks of space within commercial or mixed-use buildings, (b) large and medium sized capital and maintenance projects for commercial, manufacturing, pharmaceutical, healthcare, oil and gas, and industrial clients, and (c) smaller installation projects, of a short duration, typically involving fit-out, renovation, and retrofit work.

Our United States electrical and mechanical construction operations accounted for approximately 72% of our 2025 total revenues. Of such revenues, approximately 42% were generated by our electrical construction operations and approximately 58% were generated by our mechanical construction operations.

Our largest projects include those within: (a) the network and communications market sector (including data centers, data and fiber projects, and cabling); (b) the high-tech manufacturing market sector (including semiconductor, biotech, life-sciences, and pharmaceutical facilities, as well as projects across the electric vehicle value chain); (c) the manufacturing and industrial market sector (including food processing and traditional automotive manufacturing facilities, steel, pulp and paper mills, power generation (including sustainable energy solutions such as solar and wind), oil and gas refineries, and chemical processing plants); (d) the commercial market sector (including warehousing and distribution facilities and office or mixed-use buildings); (e) the healthcare market sector (including hospitals, surgical centers, rehabilitation and nursing facilities, and medical offices); (f) the institutional market sector (including educational and correctional facilities and research laboratories); (g) the water and wastewater market sector; (h) the transportation market sector (including highways, bridges, airports, and transit systems); and (i) the hospitality and entertainment market sector (including resorts, hotels, gaming facilities, convention centers, and sports arenas and stadiums). Our largest projects, which typically range in size from $10 million up to and occasionally exceeding $200 million, represented approximately 58% of our electrical and mechanical construction services revenues in 2025. These projects often involve new construction and a combination of design, installation, and start-up services. Depending on the size and complexity of these projects, they may span multiple years and typically require significant technical and management skills and the financial strength to obtain performance bonds, which are often a condition to bidding for and winning these projects.

Our projects of less than $10 million accounted for approximately 42% of our electrical and mechanical construction services revenues in 2025. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use, upgrade or replace aging systems, or increase energy efficiency. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, the demand for more energy efficient systems, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

Building services operations:

Our building services include:

•Maintenance and services for mechanical, electrical, plumbing, fire safety, and building automation systems;

•HVAC projects, including installation, modification and retrofits;

•Program development, management, and maintenance for energy systems, including LEED and other sustainable solutions to assist our customers in reducing energy consumption;

•Energy efficiency retrofit services, including HVAC, lighting, water, weatherization, and air flow management solutions;

•Technical consulting and diagnostic services;

•Services aimed at improving indoor air quality;

•Installation and support for building systems;

•Commercial and government site-based operations and maintenance;

•Facility management, maintenance, and services;

•Floor care and janitorial services;

•Landscaping, lot sweeping, and snow removal;

•Vendor management and call center services; and

•Infrastructure and building projects for federal, state, and local governmental agencies.

Our building services operations have built upon our traditional electrical and mechanical construction operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a local, regional, and national basis.

Our building services operations, which generated approximately 21% of our 2025 total revenues, provide services to owners, operators, tenants, and managers of all types of facilities. Of our building services revenues for 2025, approximately 87% were generated in the United States and approximately 13% were generated in the United Kingdom. As noted above, in December 2025, we sold our operations in the United Kingdom.

Of the building services revenues generated in the United States during 2025, approximately 77% was generated from our mechanical services division, approximately 18% was generated from our commercial site-based services division, and approximately 5% was generated from our government site-based services division. Our mechanical services division has benefited, in recent years, from increased demand for HVAC project and retrofit work, greater service repair and maintenance volumes, and the expansion of our building automation and controls solutions.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of customers’ facilities, including their mechanical, electrical, building automation, voice and data, and other systems, and the need for increased reliability, energy efficiency, and air filtration and sanitization. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, and manufacturing, institutional organizations, healthcare providers, large retailers and other businesses with geographically dispersed locations, as well as federal and state governments.

Within our government site-based services division, we provide building services at a number of prominent buildings in the United States, including those that house the National Archives and Records Administration, the Federal Deposit Insurance Corporation, the Government Accountability Office, and the Departments of Transportation, Education, Health and Human Services, Energy, and Homeland Security, as well as other government facilities. We also provide building services, as a prime contractor or a subcontractor, to U.S. government and intelligence agencies. The agreements pursuant to which this division provides services to the federal government are frequently for a base period and a number of option years exercisable at the sole discretion of the government, are often subject to modification or renegotiation by the government in terms of scope of services, and are subject to termination for convenience by the government prior to the expiration of the applicable term.

Industrial services operations:

Our industrial services are primarily provided to customers within the oil, gas, and petrochemical industries and consist of:

•Refinery turnaround planning and engineering services;

•Specialty welding services;

•Overhaul and maintenance of critical process units in refineries and petrochemical plants;

•Specialty technical services for refineries and petrochemical plants;

•Instrumentation, controls, and electrical services for energy infrastructure;

•Electrical panel design, fabrication, and installation;

•On-site repairs, maintenance, and service of heat exchangers, towers, vessels, and piping;

•Design, manufacturing, repair, and hydro blast cleaning of shell and tube heat exchangers and related equipment; and

•Renewable energy services, including large scale solar projects, energy storage, and waste to biogas solutions.

Our industrial services business, which generated approximately 7% of our 2025 total revenues, is a recognized leader in the refinery turnaround market and has a presence in the petrochemical and upstream markets. Demand for these services is highly dependent on the strength of the oil and gas and related industrial markets. Our industrial services operations perform turnaround and maintenance services for critical units of refineries and petrochemical plants to upgrade, repair, and maintain them. Such services include: (a) engineering and planning in advance of complex refinery and petrochemical turnarounds; (b) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers, and related mechanical equipment) during refinery and petrochemical plant shut downs; (c) replacement and new construction capital projects for refineries and petrochemical plants; (d) instrumentation, controls, and electrical services for energy infrastructure; and (e) other related specialty services such as: (i) welding (including pipe welding) and fabrication; (ii) heater, boiler, and reformer repairs and replacements; converter repair and revamps; and vessel, exchanger and tower services; (iii) tower and column repairs in refineries and petrochemical plants; (iv) installation and repair of refractory materials for critical units in process plants to protect equipment from corrosion, erosion, and extreme temperatures; and (v) acid-proofing services to protect critical components at refineries from chemical exposure. These businesses also design and manufacture highly engineered shell and tube heat exchangers and provide maintenance, repair, and cleaning services for heat exchangers both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services.

In addition to these traditional industrial services, we are leveraging our expertise in industrial services to construct and maintain carbon capture technologies and renewable energy projects.

Competition

Across our operations, we compete with national, regional, and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

The electrical and mechanical construction services industry is highly fragmented and our competition includes thousands of small companies across the United States. In addition, there are a number of larger companies focused on providing electrical and/or mechanical construction services, such as APi Group Corporation, Comfort Systems USA, Inc., Dycom Industries, Inc., Everus Construction Group, Inc., IES Holdings, Inc., MasTec, Inc., MYR Group Inc., Quanta Services, Inc., and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability, and financial strength. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure and the ability to control project costs; (e) relationships with customers; (f) price; (g) geographic diversity; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital or access to bank credit; and (k) the use of technology such as virtual design construction (“VDC”), building information modeling (“BIM”), robotics, and automation. We believe our financial position, operating results, access to bank credit and surety bonding, technical expertise including prefabrication, VDC, and BIM capabilities, and safety record, among other factors, give us an advantage over many of our competitors. However, relatively few barriers exist to prevent entry into the electrical and mechanical construction services industry.

While the building services industry is also highly fragmented, with most competitors operating in a specific geographic region, a number of large corporations and original equipment manufacturers are engaged in this field. Within our mechanical services division, we compete with entities such as APi Group Corporation, Comfort Systems USA, Inc., and Service Logic LLC, as well as Carrier Global Corporation and Trane Technologies plc. Within our commercial and government site-based divisions, competition includes companies such as Amentum Services, Inc., IAP Worldwide Services, Inc., Fluor Corporation, Cushman & Wakefield plc, CBRE Group, Inc., Jones Lang LaSalle Incorporated, Sodexo, Inc., Aramark, and ABM Industries Incorporated. In addition, we compete with several regional firms serving all or portions of the markets we target, such as BrightView Holdings, Inc., Kellermeyer Bergensons Services, LLC, and SMS Assist, L.L.C. The key competitive factors in the building services industry include: (a) availability of qualified personnel and managers; (b) service quality and technical expertise; (c) the use of technology tools and data analytics; (d) cost structure and the ability to control project costs; (e) price; and (f) geographic diversity. Due to our financial strength, scope of service offerings, our technical capability and management experience, and our geographic presence, we believe our building services operations are in a strong competitive position. However, there are relatively few barriers to entry into the building services industry.

The market for providing industrial services includes large national providers, as well as numerous regional companies. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufacturers. Competitors within this industry include JVIC, Universal Plant Services, Inc., Turner Industries Group, LLC, Team, Inc., Specialty Welding and Turnarounds, LLC, Cust-O-Fab, Inc., Dunn Heat Exchangers, Inc., Turn2 Specialty Companies, and Wyatt Field Service Company, LLC, among others. The key competitive factors in the industrial services market consist of: (a) availability of skilled workforce; (b) technical expertise; (c) service, quality, and ability to respond quickly; (d) price; and (e) safety record. Due to our technical capabilities, skilled workforce, and safety record, we believe that we are in a strong competitive position in the industrial services markets that we serve. Although the technical expertise and capital investment that is required in manufacturing heat exchangers may be considered a barrier to entry in this field, there are significantly fewer barriers to entry as it pertains to turnaround projects and services.

Human Capital

At December 31, 2025, we employed approximately 44,000 people, all of whom were located within the United States.

Based on the most recent information available from our latest filing with the U.S. Equal Employment Opportunity Commission, the gender demographic of our employees was 90% male and 10% female. Additionally, based on such information, our employees had the following race and ethnicity demographics:

Employee Demographic % of Total White 66 % Hispanic / Latino 21 % Black / African American 8 % Asian 2 % Multiracial, Native American, Native Hawaiian, and Pacific Islander 3 %

Approximately 62% of our employees are represented by various unions pursuant to approximately 450 collective bargaining agreements between our individual subsidiaries or trade associations and local unions, as well as two collective bargaining agreements that are national or regional in scope. We believe that our relations with our labor unions are generally positive.

Our ability to execute complex projects for our customers, and to perform all of our services with the excellence that makes us an industry leader, depends on our success in attracting and retaining skilled labor in a competitive market. We therefore strive to be and remain an employer of choice for the most talented employees in each of the industries and markets in which we operate. This begins with offering competitive employee compensation and benefits packages, specifically designed to meet the unique needs of each individual in our organization, which include:

•Health and Welfare Plans: All full-time employees who do not participate in union plans are offered a range of choices among medical, dental and vision plans, life, accident, dependent and disability insurance, and pre-tax health savings accounts that include employer contributions.

•Retirement Savings: We help provide our employees with financial security by offering a 401(k) Savings Plan, which includes company matching contributions.

•Degree Assistance: Eligible employees may apply for reimbursement for job-related courses or courses taken as part of a curriculum for a business or job-related degree at an accredited institution.

•Employee Assistance Program: Through our Employee Assistance Program, we offer our employees, and their dependents or household members, access to services and counseling on a variety of personal, professional, legal, and financial matters, at no cost.

•College Coaching: Our College Coach Program provided through Bright Horizons provides employees and their families with support as they navigate the college admissions process, including live webinars, tuition payment financial planning, and insight from former admissions officers, finance professionals, and educators.

Key to our attraction and retention of employees is our commitment to our EMCOR Values and our focus on employee safety and inclusion. Our Board of Directors and senior leadership engage in direct oversight and management, respectively, of our significant human capital initiatives. Our Board of Directors is regularly briefed and provides input on key human capital initiatives and metrics.

Commitment to Core Values

We are committed to our EMCOR Values of Mission First: Integrity, Discipline, and Transparency and People Always: Mutual Respect and Trust, Commitment to Safety, and Teamwork. We consistently strive to ensure these values are reflected in how we do business every day, from our corporate culture and “tone at the top,” established by our Board of Directors and management team, to the critical work performed by all of our people at every level throughout our organization. We reinforce our EMCOR Values through many ongoing initiatives. Our EMCOR Values are embodied in our policies and procedures, including our Code of Business Ethics and Conduct. We also regularly provide training on these values, both at time of hire and on an ongoing, periodic basis. In addition, to develop and reinforce our values company-wide, and empower our leaders to perform at the highest levels, senior leaders are invited to our Leadership for Results course at the Georgia Tech Scheller College of Business and our Leading with Character program at the Thayer Leadership Development Group at West Point. In addition, identified front line supervisors such as project managers and superintendents are invited to our Leader Development Program, which focuses on the development of skills to enhance their growth as leaders and emphasizes the importance of our EMCOR Values.

Workplace Safety

We believe that our focus on employee safety and well-being is reflected in our results. During a year in which our people worked nearly 100 million hours, the Company’s Total Recordable Incident Rate in 2025 was just under 1.0, which was approximately 60% lower than the U.S. Bureau of Labor Statistics’ most recently available industry average of 2.4 for NAICS Code 2382, Building Equipment Contractors. This represents our seventeenth consecutive year with a Total Recordable Incident Rate which was less than half the industry average. Our position as an industry leader in safety begins with a strong culture of care and vigilance embodied in our EMCOR Values and is supported by a comprehensive suite of training, resources, and analytics. These include: (a) our signature Be There for Life! Zero Injuries Program and Be Vigilant! Campaign, (b) incident and injury prevention planning, including in-person and online training tools and best practice guides available through our company intranet as well as to all field employees through their mobile devices, (c) enterprise level reporting and analysis of leading and lagging indicators, (d) a 24-hour incident reporting hotline, and (e) a company-wide program to share and champion best safety practices across our range of businesses. These tools have evolved with the way our people work.

Mutual Respect and Trust

In our workplace, we seek to foster a welcoming environment that reflects our EMCOR Values, including Mutual Respect and Trust. We believe that a workforce, executive management team, and Board of Directors representing a broad array of experience, perspectives, backgrounds, and personal characteristics, are important to our future success.

We strive to help all our employees realize their full potential with an equal opportunity to succeed. We work to unlock the full potential of all employees at every level through: (a) the EMCOR Manager Certificate Program, which promotes supervisory management skills, (b) our Degree Assistance Program, which provides tuition reimbursement for continuing education, and (c) the resources available to all employees on our online learning platform, EMCOR University Online, which includes thousands of on-demand training courses on a wide range of topics.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the SEC. These filings are available to the public over the internet at the SEC’s website at http://www.sec.gov.

Our Internet address is www.emcorgroup.com. We make available, free of charge, through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. References to our website addressed in this report are provided as a convenience and do not constitute, and should not be viewed as, an incorporation by reference of the information contained on, or available through, the website. Therefore, such information should not be considered part of this report.

Our Board of Directors has an audit committee, a compensation and personnel committee, and a nominating and corporate governance committee. Each of these committees has a formal charter and is comprised of independent directors. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers, and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, can be obtained on our website, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

Overview

We are one of the largest specialty contractors in the United States and a leading provider of electrical and mechanical construction and facilities services, building services, and industrial services. In 2024, we had revenues of approximately $14.6 billion. Our services are provided to a broad range of commercial, technology, manufacturing, industrial, healthcare, utility, and institutional customers through approximately 100 operating subsidiaries, which specialize principally in providing construction services relating to electrical and mechanical systems in all types of facilities and in providing various services relating to the operation, maintenance, and management of those facilities. Such operating subsidiaries are organized into the following reportable segments:

•United States electrical construction and facilities services;

•United States mechanical construction and facilities services;

•United States building services;

•United States industrial services; and

•United Kingdom building services.

Our operating subsidiaries offer comprehensive and diverse solutions on a broad scale and have many long-standing customer relationships. We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, construction managers, developers, property managers, and other subcontractors. We generally provide industrial services directly to refineries and petrochemical plants.

We derive revenues from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2024 revenues, approximately 97% were generated in the United States and approximately 3% were generated in foreign countries, substantially all in the United Kingdom. In 2024, we derived approximately 67% of our revenues from our construction operations, approximately 24% of our revenues from our building services operations, and approximately 9% of our revenues from our industrial services operations. For additional information regarding our revenues, see Note 3 - Revenue from Contracts with Customers of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

We believe that our range of service offerings, technical capability, skilled workforce, and strong project execution, along with our safety culture and financial resources, differentiate us from our competition and position us to benefit from future capital and maintenance spending by our customers. Our strategies of expanding our portfolio of service offerings for existing and potential customers and increasing or enhancing our presence in core end markets and geographies, along with our commitment to industry-leading best practices and technological and training capabilities, place us in the position to capitalize on opportunities and trends in the industries we serve and continue to grow our business.

Increasingly, our services are focused on delivering sustainable energy solutions, enhancements in energy efficiency, reductions in waste and emissions, and improvements in the safety and comfort of our customers’ facilities.

The broad scope of our operations is more particularly described below. For detailed segment financial information refer to Note 18 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

Operations

United States electrical and mechanical construction and facilities services operations:

Our electrical and mechanical construction services primarily involve the design, integration, installation, start-up, operation and maintenance, and provision of services relating to:

•Systems for electrical power transmission, distribution, and generation, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems, and related switch gear and controls;

•Premises electrical and lighting systems, including fixtures and controls;

•Process instrumentation in the refining, chemical processing, and food processing industries;

•Low-voltage systems, such as fire alarm, security, and process control systems;

•Voice and data communications, including fiber optic and low voltage cabling, distributed antenna systems, audiovisual systems, and wireless access points;

•Sustainable energy solutions such as solar, photovoltaic, and wind, as well as the installation of electric vehicle charging stations;

•Roadway and transit lighting and signaling and fiber optic lines;

•Computerized traffic control systems, and signal and communication equipment for mass transit systems;

•Heating, ventilation, air conditioning, and refrigeration, including both traditional mechanical systems as well as geothermal solutions;

•Clean-room process ventilation systems;

•Fire protection and suppression systems;

•Plumbing, process and high-purity piping systems;

•Controls and filtration systems;

•Water and wastewater treatment systems;

•Central plant heating and cooling systems, including manufacturing and installing sheet metal air handling systems;

•Crane and rigging services;

•Millwright services; and

•Steel fabrication, erection, and welding services.

The electrical and mechanical construction services industry has experienced growth principally due to the increased content, complexity, and sophistication of electrical and mechanical systems resulting, in part, from growth in digital processing, cloud computing, data storage, and the emergence of artificial intelligence. In addition, facilities of all types require extensive electrical distribution systems, sophisticated power supplies, networks of low-voltage and fiber-optic communications cabling, and various mechanical, plumbing, and fire protection and suppression systems. Moreover, the need for substantial environmental controls within a building, due to the heightened need to maintain extensive computer systems at optimal temperatures, and the demand for increased energy efficiency, have continued to expand opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity and, in recent years, has benefited from the re-shoring of the supply chain, the need for additional high-tech manufacturing facilities, and the energy transition/expansion throughout the United States.

Our electrical and mechanical construction services generally fall into one of three categories: (a) large installation projects, with contracts often in the multi-million dollar range, that involve: (i) the construction of manufacturing facilities, data centers, warehousing and distribution facilities, hospitals, and commercial buildings, (ii) institutional, public works, and infrastructure projects, or (iii) the fit-out of large blocks of space within commercial or mixed-use buildings, (b) large and medium sized capital and maintenance projects for commercial, manufacturing, pharmaceutical, healthcare, oil and gas, and industrial clients, and (c) smaller installation projects, of a short duration, typically involving fit-out, renovation, and retrofit work.

Our United States electrical and mechanical construction operations accounted for approximately 67% of our 2024 total revenues. Of such revenues, approximately 34% were generated by our electrical construction operations and approximately 66% were generated by our mechanical construction operations.

Our largest projects include those within: (a) the network and communications market sector (including data centers, data and fiber projects, and cabling); (b) the high-tech manufacturing market sector (including semiconductor, biotech, life-sciences, and pharmaceutical facilities, as well as projects across the electric vehicle value chain); (c) the commercial market sector (including warehousing and distribution facilities and office or mixed-use buildings); (d) the manufacturing and industrial market sector (including steel, pulp and paper mills, food processing and traditional automotive manufacturing facilities, power generation (including sustainable energy solutions such as solar and wind), oil and gas refineries, and chemical processing plants); (e) the healthcare market sector (including hospitals, surgical centers, rehabilitation and nursing facilities, and medical offices); (f) the institutional market sector (including educational and correctional facilities and research laboratories); (g) the water and wastewater market sector; (h) the transportation market sector (including highways, bridges, airports, and transit systems); and (i) the hospitality and entertainment market sector (including resorts, hotels, gaming facilities, convention centers, and sports stadiums). Our largest projects, which typically range in size from $10 million up to and occasionally exceeding $200 million, represented approximately 54% of our electrical and mechanical construction services revenues in 2024. These projects often involve new construction and a combination of design, installation, and start-up services. Depending on the size and complexity of these projects, they may span multiple years and typically require significant technical and management skills and the financial strength to obtain performance bonds, which are often a condition to bidding for and winning these projects.

Our projects of less than $10 million accounted for approximately 46% of our electrical and mechanical construction services revenues in 2024. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use, upgrade or replace aging systems, or increase energy efficiency. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, the demand for more energy efficient systems, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

United States and United Kingdom building services operations:

Our building services include:

•Maintenance and services for mechanical, electrical, plumbing, fire safety, and building automation systems;

•Modification and retrofit projects;

•Program development, management, and maintenance for energy systems, including LEED and other sustainable solutions to assist our customers in reducing energy consumption;

•Energy efficiency retrofit services, including HVAC, lighting, water, weatherization, and air flow management solutions;

•Technical consulting and diagnostic services;

•Services aimed at improving indoor air quality;

•Installation and support for building systems;

•Commercial and government site-based operations and maintenance;

•Facility management, maintenance, and services;

•Floor care and janitorial services;

•Landscaping, lot sweeping, and snow removal;

•Other building services, including reception, security, and catering services;

•Vendor management and call center services;

•Military base operations support services; and

•Infrastructure and building projects for federal, state, and local governmental agencies.

While not all of the above services are performed in both countries, we provide building services throughout the United States and United Kingdom. Our building services operations have built upon our traditional electrical and mechanical construction operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a local, regional, and national basis.

Our building services operations, which generated approximately 24% of our 2024 total revenues, provide services to owners, operators, tenants, and managers of all types of facilities both on a contractual basis for a specified period of time and on an individual task order basis. Of our building services revenues for 2024, approximately 88% were generated in the United States and approximately 12% were generated in the United Kingdom.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of customers’ facilities, including their mechanical, electrical, building automation, voice and data, and other systems, and the need for increased reliability, energy efficiency, and air filtration and sanitization. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, and manufacturing, institutional organizations, healthcare providers, large retailers and other businesses with geographically dispersed locations, as well as federal and state governments.

We provide building services at a number of prominent buildings in the United States, including those that house the National Archives and Records Administration, the Federal Deposit Insurance Corporation, the Government Accountability Office, and the Departments of Transportation, Education, Health and Human Services, Energy, and Homeland Security, as well as other government facilities. We also provide building services, as a prime contractor or a subcontractor, to U.S. military bases and various other governmental agencies. The agreements pursuant to which this division provides services to the federal government are frequently for a base period and a number of option years exercisable at the sole discretion of the government, are often subject to modification or renegotiation by the government in terms of scope of services, and are subject to termination by the government prior to the expiration of the applicable term.

United States industrial services operations:

Our industrial services are primarily provided to customers within the oil, gas, and petrochemical industries and consist of:

•Refinery turnaround planning and engineering services;

•Specialty welding services;

•Overhaul and maintenance of critical process units in refineries and petrochemical plants;

•Specialty technical services for refineries and petrochemical plants;

•Instrumentation, controls, and electrical services for energy infrastructure;

•Electrical panel design, fabrication, and installation;

•On-site repairs, maintenance, and service of heat exchangers, towers, vessels, and piping;

•Design, manufacturing, repair, and hydro blast cleaning of shell and tube heat exchangers and related equipment; and

•Renewable energy services, including large scale solar projects, energy storage, and waste to biogas solutions.

Our industrial services business, which generated approximately 9% of our 2024 total revenues, is a recognized leader in the refinery turnaround market and has a presence in the petrochemical and upstream markets. Demand for these services is highly dependent on the strength of the oil and gas and related industrial markets. Our industrial services operations perform turnaround and maintenance services for critical units of refineries and petrochemical plants to upgrade, repair, and maintain them. Such services include: (a) engineering and planning in advance of complex refinery and petrochemical turnarounds; (b) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers, and related mechanical equipment) during refinery and petrochemical plant shut downs; (c) replacement and new construction capital projects for refineries and petrochemical plants; (d) instrumentation, controls, and electrical services for energy infrastructure; and (e) other related specialty services such as: (i) welding (including pipe welding) and fabrication; (ii) heater, boiler, and reformer repairs and replacements; converter repair and revamps; and vessel, exchanger and tower services; (iii) tower and column repairs in refineries and petrochemical plants; (iv) installation and repair of refractory materials for critical units in process plants to protect equipment from corrosion, erosion, and extreme temperatures; and (v) acid-proofing services to protect critical components at refineries from chemical exposure. These businesses also design and manufacture highly engineered shell and tube heat exchangers and provide maintenance, repair, and cleaning services for heat exchangers both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services.

In addition to these traditional industrial services, we are leveraging our expertise in industrial services to construct and maintain carbon capture technologies and renewable energy projects.

Competition

Across our operations, we compete with national, regional, and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

The electrical and mechanical construction services industry is highly fragmented and our competition includes thousands of small companies across the United States. In addition, there are a number of larger public companies focused on providing electrical and/or mechanical construction services, such as APi Group Corporation, Comfort Systems USA, Inc., Dycom Industries, Inc., Everus Construction Group, Inc., IES Holdings, Inc., MasTec, Inc., MYR Group Inc., Quanta Services, Inc., and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability, and financial strength. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure and the ability to control project costs; (e) relationships with customers; (f) price; (g) geographic diversity; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital or access to bank credit; and (k) the use of technology such as virtual design construction (“VDC”), building information modeling (“BIM”), robotics, and automation. We believe our financial position, operating results, access to bank credit and surety bonding, technical expertise including prefabrication, VDC, and BIM capabilities, and safety record, among other factors, give us an advantage over many of our competitors. However, relatively few barriers exist to prevent entry into the electrical and mechanical construction services industry.

While the building services industry is also highly fragmented, with most competitors operating in a specific geographic region, a number of large corporations such as Amentum Services, Inc., IAP Worldwide Services, Inc., Fluor Corporation, Cushman & Wakefield plc, CBRE Group, Inc., Jones Lang LaSalle Incorporated, Sodexo, Inc., Aramark, and ABM Industries Incorporated are engaged in this field, as are large original equipment manufacturers such as Carrier Global Corporation and Trane Technologies plc. In addition, we compete with several regional firms serving all or portions of the markets we target, such as BrightView Holdings, Inc., Kellermeyer Bergensons Services, LLC, and SMS Assist, L.L.C. Our principal competitors in the United Kingdom include CBRE Group, Inc., ISS UK Ltd., Equans Services Limited, OCS Group UK Limited, and Mitie Group PLC. The key competitive factors in the building services industry include: (a) availability of qualified personnel and managers; (b) service quality and technical expertise; (c) the use of technology tools and data analytics; (d) cost structure and the ability to control project costs; (e) price; and (f) geographic diversity. Due to our size, our technical capability and management experience, and our geographic presence, we believe our building services operations are in a strong competitive position. However, there are relatively few barriers to entry into the building services industry.

The market for providing industrial services includes large national providers, as well as numerous regional companies. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufacturers. Competitors within this industry include JVIC, Universal Plant Services, Inc., Turner Industries Group, LLC, Team, Inc., Cust-O-Fab, Inc., Dunn Heat Exchangers, Inc., Turn2 Specialty Companies, and Wyatt Field Service Company, LLC, among others. The key competitive factors in the industrial services market consist of: (a) availability of skilled workforce; (b) technical expertise; (c) service, quality, and ability to respond quickly; (d) price; and (e) safety record. Due to our technical capabilities, skilled workforce, and safety record, we believe that we are in a strong competitive position in the industrial services markets that we serve. Although the technical expertise and capital investment that is required in manufacturing heat exchangers may be considered a barrier to entry in this field, there are significantly fewer barriers to entry as it pertains to turnaround projects and services.

Human Capital

At December 31, 2024, we employed approximately 40,400 people, approximately 37,500 of whom were located within the United States and approximately 2,900 of whom were located in the United Kingdom.

Based on the most recent information available from our latest filing with the U.S. Equal Employment Opportunity Commission, the gender demographic of our U.S. employees was 89% male and 11% female. Additionally, based on such information, our U.S. employees had the following race and ethnicity demographics:

Employee Demographic % of Total White 66 % Hispanic / Latino 21 % Black / African American 8 % Asian 2 % Multiracial, Native American, Native Hawaiian, and Pacific Islander 3 %

Approximately 63% of our employees are represented by various unions pursuant to approximately 425 collective bargaining agreements between our individual subsidiaries or trade associations and local unions, as well as two collective bargaining agreements that are national or regional in scope. We believe that our relations with our labor unions are generally positive.

Our ability to execute complex projects for our customers, and to perform all of our services with the excellence that makes us an industry leader, depends on our success in attracting and retaining skilled labor in a competitive market. We therefore strive to be and remain an employer of choice for the most talented employees in each of the industries and markets in which we operate. This begins with offering competitive employee compensation and benefits packages, specifically designed to meet the unique needs of each individual in our organization, which include:

•Health and Welfare Plans: All full-time employees who do not participate in union plans are offered a range of choices among medical, dental and vision plans, life, accident, dependent and disability insurance, and pre-tax health savings accounts that include employer contributions.

•Retirement Savings: We help provide our employees with financial security by offering a 401(k) Savings Plan, which includes company matching contributions.

•Degree Assistance: Eligible employees may apply for reimbursement for job-related courses or courses taken as part of a curriculum for a business or job-related degree at an accredited institution.

•Employee Assistance Program: Through our Employee Assistance Program, we offer our employees, and their dependents or household members, access to services and counseling on a variety of personal, professional, legal, and financial matters, at no cost.

•College Coaching: Our College Coach Program provided through Bright Horizons provides employees and their families with support as they navigate the college admissions process, including live webinars, tuition payment financial planning, and insight from former admissions officers, finance professionals, and educators.

Key to our attraction and retention of employees is our commitment to our EMCOR Values and our focus on employee safety and inclusion. Our Board of Directors and senior leadership engage in direct oversight and management, respectively, of our significant human capital initiatives. Our Board of Directors is regularly briefed and provides input on key human capital initiatives and metrics.

Commitment to Core Values

We are committed to our EMCOR Values of Mission First: Integrity, Discipline, and Transparency and People Always: Mutual Respect and Trust, Commitment to Safety, and Teamwork. We consistently strive to ensure these values are reflected in how we do business every day, from our corporate culture and “tone at the top,” established by our Board of Directors and management team, to the critical work performed by all of our people at every level throughout our organization. We reinforce our EMCOR Values through many ongoing initiatives. Our EMCOR Values are embodied in our policies and procedures, including our Code of Business Ethics and Conduct. We also regularly provide training on these values, both at time of hire and on an ongoing, periodic basis. In addition, to develop and reinforce our values company-wide, and empower our leaders to perform at the highest levels, senior leaders are invited to our Leadership for Results course and our Leading with Character program at the Thayer Leadership Development Group at West Point. In addition, identified front line leaders such as project managers, superintendents and supervisors are invited to our Leader Development Program, which focuses on the development of skills to enhance their growth as leaders and emphasizes the importance of our EMCOR Values.

Workplace Safety

We believe that our focus on employee safety and well-being is reflected in our results. During a year in which our people worked over 89 million hours, the Company’s Total Recordable Incident Rate in 2024 was just under 1.0, which was approximately 60% lower than the U.S. Bureau of Labor Statistics’ most recently available industry average of 2.4 for NAICS Code 2382, Building Equipment Contractors. This represents our sixteenth consecutive year with a Total Recordable Incident Rate which was less than half the industry average. Our position as an industry leader in safety begins with a strong culture of care and vigilance embodied in our EMCOR Values and is supported by a comprehensive suite of training, resources, and analytics. These include: (a) our signature Be There for Life! Zero Injuries Program and Be Vigilant! Campaign, (b) incident and injury prevention planning, including in-person and online training tools and best practice guides available through our company intranet, (c) enterprise level reporting and analysis of leading and lagging indicators, (d) a 24-hour incident reporting hotline, and (e) a company-wide program to share and champion best safety practices across our range of businesses. These tools are evolving with the way our people work, including employees in the field. For example, we have deployed an online safety training program available to any employee on a mobile device.

Mutual Respect and Trust

In our workplace, we seek to foster a welcoming environment that reflects our EMCOR Values, including Mutual Respect and Trust. We believe that a workforce, executive management team, and Board of Directors representing a broad array of experience, perspectives, background, and personal characteristics, are important to our future success.

We strive to help all our employees realize their full potential with an equal opportunity to succeed. We work to unlock the full potential of all employees at every level through: (a) the EMCOR Manager Certificate Program, which promotes supervisory management skills, (b) our Degree Assistance Program, which provides tuition reimbursement for continuing education, and (c) the resources available to all employees on our online learning platform, EMCOR University Online, which includes thousands of on-demand training courses on a wide range of topics.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the SEC. These filings are available to the public over the internet at the SEC’s website at http://www.sec.gov.

Our Internet address is www.emcorgroup.com. We make available, free of charge, through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. References to our website addressed in this report are provided as a convenience and do not constitute, and should not be viewed as, an incorporation by reference of the information contained on, or available through, the website. Therefore, such information should not be considered part of this report.

Our Board of Directors has an audit committee, a compensation and personnel committee, and a nominating and corporate governance committee. Each of these committees has a formal charter and is comprised of independent directors. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers, and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, can be obtained on our website, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

Overview

We are one of the largest specialty contractors in the United States and a leading provider of electrical and mechanical construction and facilities services, building services, and industrial services. In 2023, we had revenues of approximately $12.6 billion. Our services are provided to a broad range of commercial, technology, manufacturing, industrial, healthcare, utility, and institutional customers through approximately 100 operating subsidiaries, which specialize principally in providing construction services relating to electrical and mechanical systems in all types of facilities and in providing various services relating to the operation, maintenance, and management of those facilities. Such operating subsidiaries are organized into the following reportable segments:

•United States electrical construction and facilities services;

•United States mechanical construction and facilities services;

•United States building services;

•United States industrial services; and

•United Kingdom building services.

Our operating subsidiaries offer comprehensive and diverse solutions on a broad scale and have many long-standing customer relationships. We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, construction managers, developers, property managers, and other subcontractors. We generally provide industrial services directly to refineries and petrochemical plants.

We derive revenues from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2023 revenues, approximately 97% were generated in the United States and approximately 3% were generated in foreign countries, substantially all in the United Kingdom. In 2023, we derived approximately 63% of our revenues from our construction operations, approximately 28% of our revenues from our building services operations, and approximately 9% of our revenues from our industrial services operations. For additional information regarding our revenues, see Note 3 - Revenue from Contracts with Customers of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

We believe that our range of service offerings, technical capability, skilled workforce, and strong project execution, along with our safety culture and financial resources, differentiate us from our competition and position us to benefit from future capital and maintenance spending by our customers. Our strategies of expanding our portfolio of service offerings for existing and potential customers and increasing or enhancing our presence in core end markets and geographies, along with our commitment to industry-leading best practices and technological and training capabilities, place us in the position to capitalize on opportunities and trends in the industries we serve and continue to grow our business.

Increasingly, our services are focused on delivering sustainable energy solutions, enhancements in energy efficiency, reductions in waste and emissions, and improvements in the safety and comfort of our customers’ facilities.

The broad scope of our operations is more particularly described below. For detailed segment financial information refer to Note 18 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

Operations

United States electrical and mechanical construction and facilities services operations:

Our electrical and mechanical construction services primarily involve the design, integration, installation, start-up, operation and maintenance, and provision of services relating to:

•Systems for electrical power transmission, distribution, and generation, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems, and related switch gear and controls;

•Sustainable energy solutions such as solar, photovoltaic, and wind, as well as the installation of electric vehicle charging stations;

•Premises electrical and lighting systems, including fixtures and controls;

•Process instrumentation in the refining, chemical processing, and food processing industries;

•Low-voltage systems, such as fire alarm, security, and process control systems;

•Voice and data communications, including fiber optic and low voltage cabling, distributed antenna systems, audiovisual systems, and wireless access points;

•Roadway and transit lighting and signaling and fiber optic lines;

•Computerized traffic control systems, and signal and communication equipment for mass transit systems;

•Heating, ventilation, air conditioning, and refrigeration, including both traditional mechanical systems as well as geothermal solutions;

•Clean-room process ventilation systems;

•Fire protection and suppression systems;

•Plumbing, process and high-purity piping systems;

•Controls and filtration systems;

•Water and wastewater treatment systems;

•Central plant heating and cooling systems, including manufacturing and installing sheet metal air handling systems;

•Crane and rigging services;

•Millwright services; and

•Steel fabrication, erection, and welding services.

The electrical and mechanical construction services industry has experienced growth principally due to the increased content, complexity, and sophistication of electrical and mechanical systems resulting, in part, from growth in digital processing, cloud computing, data storage, and the emergence of artificial intelligence. In addition, facilities of all types require extensive electrical distribution systems, sophisticated power supplies, networks of low-voltage and fiber-optic communications cabling, and various mechanical, plumbing, and fire protection and suppression systems. Moreover, the need for substantial environmental controls within a building, due to the heightened need to maintain extensive computer systems at optimal temperatures, and the demand for increased energy efficiency, have continued to expand opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity and, in recent years, has benefited from the re-shoring of the supply chain, the need for additional high-tech manufacturing facilities, and the energy transition/expansion throughout the United States, all of which have been bolstered by certain government incentives.

Our electrical and mechanical construction services generally fall into one of three categories: (a) large installation projects, with contracts often in the multi-million dollar range, that involve: (i) the construction of manufacturing facilities, data centers, warehousing and distribution facilities, and commercial buildings, (ii) institutional and public works projects, or (iii) the fit-out of large blocks of space within commercial or mixed-use buildings, (b) large and medium sized capital and maintenance projects for commercial, manufacturing, pharmaceutical, healthcare, oil and gas, and industrial clients, and (c) smaller installation projects, of a short duration, typically involving fit-out, renovation, and retrofit work.

Our United States electrical and mechanical construction operations accounted for approximately 63% of our 2023 total revenues. Of such revenues, approximately 35% were generated by our electrical construction operations and approximately 65% were generated by our mechanical construction operations.

Our largest projects typically include those within: (a) the commercial market sector (including warehousing and distribution facilities, office or mixed-use buildings, and shopping malls); (b) the network and communications market sector (including data centers, data and fiber projects, and cabling); (c) the manufacturing and industrial market sector (including steel, pulp and paper mills, food processing and traditional automotive manufacturing facilities, power generation (including sustainable energy solutions such as solar and wind), oil and gas refineries, and chemical processing plants); (d) the high-tech manufacturing market sector (including semiconductor, biotech, life-sciences, and pharmaceutical facilities, as well as projects across the electric vehicle value chain); (e) the healthcare market sector (including hospitals, surgical centers, rehabilitation and nursing facilities, and medical offices); (f) the institutional market sector (including educational and correctional facilities and research laboratories); (g) the water and wastewater market sector; (h) the transportation market sector (including highways, bridges, airports, and transit systems); and (i) the hospitality and entertainment market sector (including resorts, hotels, gaming facilities, convention centers, and sports stadiums). Our largest projects, which typically range in size from $10 million up to and occasionally exceeding $200 million, represented approximately 45% of our electrical and mechanical construction services revenues in 2023. These projects often involve new construction and a combination of design, installation, and start-up services. Depending on the size and complexity of these projects, they may span multiple years and typically require significant technical and management skills and the financial strength to obtain performance bonds, which are often a condition to bidding for and winning these projects.

Our projects of less than $10 million accounted for approximately 55% of our electrical and mechanical construction services revenues in 2023. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use, upgrade or replace aging systems, or increase energy efficiency. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, the demand for more energy efficient systems, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

United States and United Kingdom building services operations:

Our building services include:

•Maintenance and services for mechanical, electrical, plumbing, fire safety, and building automation systems;

•Modification and retrofit projects;

•Program development, management, and maintenance for energy systems, including LEED and other sustainable solutions to assist our customers in reducing energy consumption;

•Energy efficiency retrofit services, including HVAC, lighting, water, weatherization, and air flow management solutions:

•Technical consulting and diagnostic services;

•Services aimed at improving indoor air quality;

•Installation and support for building systems;

•Commercial and government site-based operations and maintenance;

•Facility management, maintenance, and services;

•Floor care and janitorial services, including enhanced cleaning and sanitization services;

•Landscaping, lot sweeping, and snow removal;

•Other building services, including reception, security, and catering services;

•Vendor management and call center services;

•Military base operations support services; and

•Infrastructure and building projects for federal, state, and local governmental agencies.

While not all of the above services are performed in both countries, we provide building services throughout the United States and United Kingdom. Our building services operations have built upon our traditional electrical and mechanical construction operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a local, regional, and national basis.

Our building services operations, which generated approximately 28% of our 2023 total revenues, provide services to owners, operators, tenants, and managers of all types of facilities both on a contractual basis for a specified period of time and on an individual task order basis. Of our building services revenues for 2023, approximately 88% were generated in the United States and approximately 12% were generated in the United Kingdom.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of customers’ facilities, including their mechanical, electrical, building automation, voice and data, and other systems, and the need for increased reliability, energy efficiency, and air filtration and sanitization. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include federal and state governments, institutional organizations, utilities, healthcare providers, and major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, and manufacturing, as well as large retailers and other businesses with geographically dispersed locations.

We provide building services at a number of prominent buildings in the United States, including those that house the National Archives and Records Administration, the Federal Deposit Insurance Corporation, the Government Accountability Office, and the Departments of Transportation, Education, Health and Human Services, Energy, and Homeland Security, as well as other government facilities, including the NASA Jet Propulsion Laboratory. We also provide building services, as a prime contractor or a subcontractor, to U.S. military bases and various other governmental agencies. The agreements pursuant to which this division provides services to the federal government are frequently for a base period and a number of option years exercisable at the sole discretion of the government, are often subject to modification or renegotiation by the government in terms of scope of services, and are subject to termination by the government prior to the expiration of the applicable term.

United States industrial services operations:

Our industrial services are primarily provided to customers within the oil, gas, and petrochemical industries and consist of:

•Refinery turnaround planning and engineering services;

•Specialty welding services;

•Overhaul and maintenance of critical process units in refineries and petrochemical plants;

•Specialty technical services for refineries and petrochemical plants;

•Instrumentation and electrical services for energy infrastructure;

•On-site repairs, maintenance, and service of heat exchangers, towers, vessels, and piping;

•Design, manufacturing, repair, and hydro blast cleaning of shell and tube heat exchangers and related equipment; and

•Renewable energy services, including large scale solar projects, energy storage, and waste to biogas solutions.

Our industrial services business, which generated approximately 9% of our 2023 total revenues, is a recognized leader in the refinery turnaround market and has a presence in the petrochemical market. Demand for these services is highly dependent on the strength of the oil and gas and related industrial markets. Our industrial services operations perform turnaround and maintenance services for critical units of refineries and petrochemical plants to upgrade, repair, and maintain them. Such services include: (a) engineering and planning in advance of complex refinery and petrochemical turnarounds; (b) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers, and related mechanical equipment) during refinery and petrochemical plant shut downs; (c) replacement and new construction capital projects for refineries and petrochemical plants; (d) instrumentation and electrical services for energy infrastructure; and (e) other related specialty services such as: (i) welding (including pipe welding) and fabrication; (ii) heater, boiler, and reformer repairs and replacements; converter repair and revamps; and vessel, exchanger and tower services; (iii) tower and column repairs in refineries and petrochemical plants; (iv) installation and repair of refractory materials for critical units in process plants to protect equipment from corrosion, erosion, and extreme temperatures; and (v) acid-proofing services to protect critical components at refineries from chemical exposure. These businesses also design and manufacture highly engineered shell and tube heat exchangers and provide maintenance, repair, and cleaning services for heat exchangers both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services.

In addition to these traditional industrial services, we are beginning to leverage our expertise in industrial services to construct and maintain carbon capture technologies and renewable energy projects.

Competition

Across our operations, we compete with national, regional, and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

The electrical and mechanical construction services industry is highly fragmented and our competition includes thousands of small companies across the United States. In addition, there are a number of larger public companies focused on providing electrical and/or mechanical construction services, such as APi Group Corporation, Comfort Systems USA, Inc., Dycom Industries, Inc., IES Holdings, Inc., MasTec, Inc., MYR Group Inc., and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability, and financial strength. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure and the ability to control project costs; (e) relationships with customers; (f) price; (g) geographic diversity; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital or access to bank credit; and (k) the use of technology such as building information modeling (BIM). We believe our financial position, operating results, access to bank credit and surety bonding, technical expertise including prefabrication and BIM capabilities, and safety record, among other factors, give us an advantage over many of our competitors. However, relatively few barriers exist to prevent entry into the electrical and mechanical construction services industry.

While the building services industry is also highly fragmented, with most competitors operating in a specific geographic region, a number of large corporations such as Amentum Services, Inc., IAP Worldwide Services, Inc., Fluor Corporation, J&J Worldwide Services, Cushman & Wakefield plc, CBRE Group, Inc., Jones Lang LaSalle Incorporated, Sodexo, Inc., Aramark, and ABM Industries Incorporated are engaged in this field, as are large original equipment manufacturers such as Carrier Global Corporation and Trane Technologies plc. In addition, we compete with several regional firms serving all or portions of the markets we target, such as BrightView Holdings, Inc., Kellermeyer Bergensons Services, LLC, and SMS Assist, L.L.C. Our principal competitors in the United Kingdom include CBRE Group, Inc., ISS UK Ltd., Equans Services Limited, OCS Group UK Limited, and Mitie Group PLC. The key competitive factors in the building services industry include: (a) availability of qualified personnel and managers; (b) service quality and technical expertise; (c) the use of technology tools and data analytics; (d) cost structure and the ability to control project costs; (e) price; and (f) geographic diversity. Due to our size, our technical capability and management experience, and our geographic presence, we believe our building services operations are in a strong competitive position. However, there are relatively few barriers to entry into the building services industry.

The market for providing industrial services includes large national providers, as well as numerous regional companies. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufacturers. Competitors within this industry include JVIC Catalyst Services, Universal Plant Services, Inc., Turner Industries Group, LLC, Team, Inc., Cust-O-Fab, Inc., Dunn Heat Exchangers, Inc., Turn2 Specialty Companies, and Wyatt Field Service Company, LLC, among others. The key competitive factors in the industrial services market consist of: (a) availability of skilled workforce; (b) technical expertise; (c) service, quality, and ability to respond quickly; (d) price; and (e) safety record. Due to our technical capabilities, skilled workforce, and safety record, we believe that we are in a strong competitive position in the industrial services markets that we serve. Although the technical expertise and capital investment that is required in manufacturing heat exchangers may be considered a barrier to entry in this field, there are significantly fewer barriers to entry as it pertains to turnaround projects and services.

Human Capital

At December 31, 2023, we employed approximately 38,300 people, approximately 35,000 of whom were located within the United States and approximately 3,300 of whom were located in the United Kingdom.

Based on the most recent information available from our latest filing with the U.S. Equal Employment Opportunity Commission, the gender demographic of our U.S. employees was 89% male and 11% female. Additionally, based on such information, our U.S. employees had the following race and ethnicity demographics:

Employee Demographic % of Total White 69 % Hispanic / Latino 18 % Black / African American 8 % Asian 2 % Multiracial, Native American, Native Hawaiian, and Pacific Islander 3 %

Approximately 60% of our employees are represented by various unions pursuant to nearly 450 collective bargaining agreements between our individual subsidiaries or trade associations and local unions, as well as two collective bargaining agreements that are national or regional in scope. We believe that our relations with our labor unions are generally positive.

Our ability to execute complex projects for our customers, and to perform all of our services with the excellence that makes us an industry leader, depends on our success in attracting and retaining skilled labor in a competitive market. We therefore strive to be and remain an employer of choice for the most talented employees in each of the industries and markets in which we operate. This begins with offering competitive employee compensation and benefits packages, specifically designed to meet the unique needs of each individual in our organization, which include:

•Health and Welfare Plans: All full-time employees who do not participate in union plans are offered a range of choices among medical, dental and vision plans, life, accident, dependent and disability insurance, and pre-tax health savings accounts that include employer contributions.

•Retirement Savings: We help provide our employees with financial security by offering a 401(k) Savings Plan, which includes company matching contributions.

•Degree Assistance: Eligible employees may apply for reimbursement for job-related courses or courses taken as part of a curriculum for a business or job-related degree at an accredited institution.

•Employee Assistance Program: Through our Employee Assistance Program, we offer our employees, and their dependents or household members, access to services and counseling on a variety of personal, professional, legal, and financial matters, at no cost.

•College Coaching: Our College Coach Program provided through Bright Horizons provides employees and their families with support as they navigate the college admissions process, including live webinars, tuition payment financial planning, and insight from former admissions officers, finance professionals, and educators.

Key to our attraction and retention of employees is our commitment to our EMCOR Values and our focus on employee safety and inclusion. Our Board of Directors and senior leadership engage in direct oversight and management, respectively, of our significant human capital initiatives. Our Board of Directors is regularly briefed and provides input on key human capital initiatives and metrics.

Commitment to Core Values

We are committed to our EMCOR Values of Mission First: Integrity, Discipline, and Transparency and People Always: Mutual Respect and Trust, Commitment to Safety, and Teamwork. We consistently strive to ensure these values are reflected in how we do business every day, from our corporate culture and “tone at the top,” established by our Board of Directors and management team, to the critical work performed by all of our people at every level throughout our organization. We reinforce our EMCOR Values through many ongoing initiatives. Our EMCOR Values are embodied in our policies and procedures, including our Code of Business Ethics and Conduct. We also regularly provide training on these values, both at time of hire and on an ongoing, periodic basis. In addition, to develop and reinforce our values company-wide, and empower our leaders to perform at the highest levels, senior leaders are invited to our Leadership for Results course and our Leading with Character program at the Thayer Leadership Development Group at West Point. In addition, identified front line leaders such as project managers, superintendents and supervisors are invited to our Leader Development Program, which focuses on the development of skills to enhance their growth as leaders and emphasizes the importance of our EMCOR Values.

Workplace Safety

We believe that our focus on employee safety and well-being is reflected in our results. During a year in which our people worked over 80 million hours, the Company’s Total Recordable Incident Rate in 2023 was just under 1.2, which was approximately 50% lower than the U.S. Bureau of Labor Statistics’ most recently available industry average of 2.4 for NAICS Code 2382, Building Equipment Contractors. This represents our fifteenth consecutive year with a Total Recordable Incident Rate which was less than half the industry average. Our position as an industry leader in safety begins with a strong culture of care and vigilance embodied in our EMCOR Values and is supported by a comprehensive suite of training, resources, and analytics. These include: (a) our signature Be There for Life! Zero Injuries Program and Be Vigilant! Campaign, (b) incident and injury prevention planning, including in-person and online training tools and best practice guides available through our company intranet, (c) enterprise level reporting and analysis of leading and lagging indicators, (d) a 24-hour incident reporting hotline, and (e) a company-wide program to share and champion best safety practices across our range of businesses. These tools are evolving with the way our people work, including employees in the field. For example, we have deployed an online safety training program available to any employee on a mobile device.

A Diverse and Inclusive Workplace

We believe that a diverse and inclusive workforce is important to the long-term success of our business. We actively seek to increase the diversity of our workforce and to practice our commitment to diversity and inclusion in hiring, development, and training, embracing diversity of experience, background, and personal characteristics. This extends to our senior leadership and Board of Directors, where we require that any slate of recruited candidates for a named executive officer or other corporate officer position, and new management-supported director nominees, include a diverse group of individuals. We have also designed and implemented policies and practices to promote a workplace free from discrimination, including our Affirmative Action and Equal Opportunity Policy, the implementation, effectiveness, and reporting requirements of which are overseen by our designated Affirmative Action Officer.

We strive to help all our employees realize their full potential with an equal opportunity to succeed. We work to unlock the full potential of all employees at every level through: (a) the EMCOR Manager Certificate Program, which promotes supervisory management skills, (b) our Degree Assistance Program, which provides tuition reimbursement for continuing education, and (c) the resources available to all employees on our online learning platform, EMCOR University Online, which includes thousands of on-demand training courses on a wide range of topics.

In furtherance of our EMCOR Values, all EMCOR employees are required to complete inclusive workplace training, and our current and future leaders undergo implicit association training.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the SEC. These filings are available to the public over the internet at the SEC’s website at http://www.sec.gov.

Our Internet address is www.emcorgroup.com. We make available, free of charge, through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. References to our website addressed in this report are provided as a convenience and do not constitute, and should not be viewed as, an incorporation by reference of the information contained on, or available through, the website. Therefore, such information should not be considered part of this report.

Our Board of Directors has an audit committee, a compensation and personnel committee, and a nominating and corporate governance committee. Each of these committees has a formal charter and is comprised of independent directors. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers, and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, can be obtained on our website, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

Overview

We are one of the largest specialty contractors in the United States and a leading provider of electrical and mechanical construction and facilities services, building services, and industrial services. In 2022, we had revenues of approximately $11.1 billion. Our services are provided to a broad range of commercial, industrial, healthcare, utility, and institutional customers through approximately 100 operating subsidiaries, which specialize principally in providing construction services relating to electrical and mechanical systems in all types of facilities and in providing various services relating to the operation, maintenance, and management of those facilities. Such operating subsidiaries are organized into the following reportable segments:

•United States electrical construction and facilities services

•United States mechanical construction and facilities services

•United States building services

•United States industrial services

•United Kingdom building services

Our operating subsidiaries offer comprehensive and diverse solutions on a broad scale and have many long-standing customer relationships. We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, construction managers, developers, property managers, and other subcontractors. Our industrial services are generally provided directly to refineries and petrochemical plants.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2022 revenues, approximately 96% were generated in the United States and approximately 4% were generated in foreign countries, substantially all in the United Kingdom. In 2022, approximately 61% of our revenues were derived from our construction operations, approximately 29% of our revenues were derived from our building services operations and approximately 10% of our revenues were derived from our industrial services operations. For additional information regarding our revenues, see Note 3 - Revenue from Contracts with Customers of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

We believe that our range of service offerings, technical capability, skilled workforce, and strong project execution, along with our safety culture and financial resources, differentiate us from our competition and position us to benefit from future capital and maintenance spending by our customers. Our strategies of expanding our portfolio of service offerings for existing and potential customers and increasing or enhancing our presence in core end markets and geographies, along with our commitment to industry-leading best practices and technological and training capabilities, place us in the position to capitalize on opportunities and trends in the industries we serve and continue to grow our business.

Increasingly, our services are focused on delivering sustainable energy solutions, enhancements in energy efficiency, reductions in waste and emissions, and improvements in the safety and comfort of our customers’ facilities, as discussed in further detail below.

The broad scope of our operations is more particularly described below. For detailed segment financial information refer to Note 18 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

Operations

United States electrical and mechanical construction and facilities services operations:

Our electrical and mechanical construction services primarily involve the design, integration, installation, start-up, operation and maintenance, and provision of services relating to:

•Systems for electrical power transmission, distribution, and generation, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems, and related switch gear and controls;

•Sustainable energy solutions such as solar, photovoltaic, and wind, as well as the installation of electric vehicle charging stations;

•Premises electrical and lighting systems, including fixtures and controls;

•Process instrumentation in the refining, chemical processing, and food processing industries;

•Low-voltage systems, such as fire alarm, security, and process control systems;

•Voice and data communications, including fiber optic and low voltage cabling, distributed antenna systems, audiovisual systems, and wireless access points;

•Roadway and transit lighting and signaling and fiber optic lines;

•Computerized traffic control systems, and signal and communication equipment for mass transit systems;

•Heating, ventilation, air conditioning, and refrigeration, including both traditional mechanical systems as well as geothermal solutions;

•Clean-room process ventilation systems;

•Fire protection and suppression systems;

•Plumbing, process and high-purity piping systems;

•Controls and filtration systems;

•Water and wastewater treatment systems;

•Central plant heating and cooling systems, including manufacturing and installing sheet metal air handling systems;

•Crane and rigging services;

•Millwright services; and

•Steel fabrication, erection, and welding services.

The electrical and mechanical construction services industry has experienced growth due principally to the increased content, complexity, and sophistication of electrical and mechanical systems resulting, in part, from growth in digital processing, cloud computing, and data storage. In addition, facilities of all types require extensive electrical distribution systems, sophisticated power supplies, networks of low-voltage and fiber-optic communications cabling, and various mechanical, plumbing, and fire protection and suppression systems. Moreover, the need for substantial environmental controls within a building, due to the heightened need to maintain extensive computer systems at optimal temperatures, and the demand for increased energy efficiency, have continued to expand opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity and, in recent years, has benefited from the re-shoring of the supply chain, the need for additional high-tech manufacturing facilities, and the energy transition/expansion throughout the United States.

Our electrical and mechanical construction services generally fall into one of three categories: (a) large installation projects, with contracts often in the multi-million dollar range, that involve: (i) the construction of manufacturing facilities, data centers, warehousing and distribution facilities, and commercial buildings, (ii) institutional and public works projects, or (iii) the fit-out of large blocks of space within commercial or mixed-use buildings, (b) large and medium sized capital and maintenance projects for commercial, manufacturing, pharmaceutical, healthcare, oil and gas, and industrial clients, and (c) smaller installation projects, of a short duration, typically involving fit-out, renovation, and retrofit work.

Our United States electrical and mechanical construction operations accounted for approximately 61% of our 2022 total revenues. Of such revenues, approximately 36% were generated by our electrical construction operations and approximately 64% were generated by our mechanical construction operations.

Our largest projects typically include those: (a) for commercial purposes (such as office buildings, data centers, convention centers, sports stadiums, and shopping malls); (b) for high-tech manufacturing purposes (such as semiconductor, biotech, life-sciences, and pharmaceutical facilities); (c) for traditional manufacturing and industrial purposes (such as steel, pulp and paper mills, food processing and automotive manufacturing facilities, power generation (including sustainable energy solutions such as solar and wind), oil and gas refineries, and chemical processing plants); (d) for transportation purposes (such as highways, bridges, airports, and transit systems); (e) for institutional purposes (such as educational and correctional facilities and research laboratories); (f) for healthcare purposes (such as hospitals, surgical centers, rehabilitation and nursing facilities, and medical offices); (g) for water and wastewater purposes; and (h) for hospitality purposes (such as resorts, hotels, and gaming facilities). Our largest projects, which typically range in size from $10 million up to and occasionally exceeding $200 million, represented approximately 40% of our electrical and mechanical construction services revenues in 2022. These projects often involve new construction and a combination of design, installation, and start-up services. Depending on the size and complexity of these projects, they may span multiple years and typically require significant technical and management skills and the financial strength to obtain performance bonds, which are often a condition to bidding for and winning these projects.

Our projects of less than $10 million accounted for approximately 60% of our electrical and mechanical construction services revenues in 2022. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use, upgrade or replace aging systems, or increase energy efficiency. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, the demand for more energy efficient systems, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

United States and United Kingdom building services operations:

Our building services include:

•Mobile mechanical maintenance and services for mechanical, electrical, plumbing, fire safety, and building automation systems;

•Modification and retrofit projects;

•Program development, management, and maintenance for energy systems, including LEED and other sustainable solutions to assist our customers in reducing energy consumption;

•Technical consulting and diagnostic services;

•Services aimed at improving indoor air quality;

•Installation and support for building systems;

•Commercial and government site-based operations and maintenance;

•Facility management, maintenance, and services;

•Floor care and janitorial services, including enhanced cleaning and sanitization services;

•Landscaping, lot sweeping, and snow removal;

•Other building services, including reception, security, and catering services;

•Vendor management and call center services;

•Military base operations support services; and

•Infrastructure and building projects for federal, state, and local governmental agencies.

While not all of the above services are performed in both countries, we provide building services throughout the United States and United Kingdom. Our building services operations have built upon our traditional electrical and mechanical construction operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a local, regional, and national basis.

Our building services operations, which generated approximately 29% of our 2022 total revenues, provide services to owners, operators, tenants, and managers of all types of facilities both on a contractual basis for a specified period of time and on an individual task order basis. Of our building services revenues for 2022, approximately 85% were generated in the United States and approximately 15% were generated in the United Kingdom.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of customers’ facilities, including their mechanical, electrical, building automation, voice and data, and other systems, and the need for increased reliability, energy efficiency, and air filtration and sanitization. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include federal and state governments, institutional organizations, utilities, healthcare providers, and major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, and manufacturing, as well as large retailers and other businesses with geographically dispersed locations.

We provide building services at a number of prominent buildings in the United States, including those that house the National Archives and Records Administration, the Federal Deposit Insurance Corporation, the Government Accountability Office, and the Department of Health and Human Services, as well as other government facilities, including the NASA Jet Propulsion Laboratory. We also provide building services, as a prime contractor or a subcontractor, to U.S. military bases, including the Defense Intelligence Agency located on Joint Base Anacostia-Bolling, and are involved in a joint venture providing building services to NASA’s Armstrong Flight Research Center. The agreements pursuant to which this division provides services to the federal government are frequently for a base period and a number of option years exercisable at the sole discretion of the government, are often subject to renegotiation by the government in terms of scope of services, and are subject to termination by the government prior to the expiration of the applicable term.

United States industrial services operations:

Our industrial services are primarily provided to customers within the oil, gas, and petrochemical industries and consist of:

•Refinery turnaround planning and engineering services;

•Specialty welding services;

•Overhaul and maintenance of critical process units in refineries and petrochemical plants;

•Specialty technical services for refineries and petrochemical plants;

•Instrumentation and electrical services for energy infrastructure;

•On-site repairs, maintenance, and service of heat exchangers, towers, vessels, and piping;

•Design, manufacturing, repair, and hydro blast cleaning of shell and tube heat exchangers and related equipment; and

•Renewable energy services, including large scale solar projects, energy storage, and waste to biogas solutions.

Our industrial services business, which generated approximately 10% of our 2022 total revenues, is a recognized leader in the refinery turnaround market and has a presence in the petrochemical market. Demand for these services is highly dependent on the strength of the oil and gas and related industrial markets. Our industrial services operations perform turnaround and maintenance services for critical units of refineries and petrochemical plants to upgrade, repair, and maintain them. Such services include: (a) engineering and planning in advance of complex refinery turnarounds; (b) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers, and related mechanical equipment) during refinery and petrochemical plant shut downs; (c) replacement and new construction capital projects for refineries and petrochemical plants; (d) instrumentation and electrical services for energy infrastructure; and (e) other related specialty services such as: (i) welding (including pipe welding) and fabrication; (ii) heater, boiler, and reformer repairs and replacements; converter repair and revamps; and vessel, exchanger and tower services; (iii) tower and column repairs in refineries and petrochemical plants; (iv) installation and repair of refractory materials for critical units in process plants to protect equipment from corrosion, erosion, and extreme temperatures; and (v) acid-proofing services to protect critical components at refineries from chemical exposure. These businesses also design and manufacture highly engineered shell and tube heat exchangers and provide maintenance, repair, and cleaning services for heat exchangers both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services.

In addition to these traditional industrial services, we are working to leverage our expertise in industrial services to construct and maintain carbon capture technologies and renewable energy projects.

Competition

Across our operations, we compete with national, regional, and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

The electrical and mechanical construction services industry is highly fragmented and our competition includes thousands of small companies across the United States. In addition, there are a number of larger public companies focused on providing electrical and/or mechanical construction services, such as APi Group Corporation, Comfort Systems USA, Inc., Dycom Industries, Inc., IES Holdings, Inc., MasTec, Inc., MYR Group, Inc., and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability, and financial strength. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure and the ability to control project costs; (e) relationships with customers; (f) price; (g) geographic diversity; (h) experience in specialized markets; (i) the ability to obtain surety bonding; and (j) adequate working capital or access to bank credit. We believe our financial position, operating results, access to bank credit and surety bonding, technical expertise, and safety record, among other factors, give us an advantage over many of our competitors. However, relatively few barriers exist to prevent entry into the electrical and mechanical construction services industry.

While the building services industry is also highly fragmented, with most competitors operating in a specific geographic region, a number of large corporations such as Amentum Services, Inc., IAP Worldwide Services, Inc., Fluor Corporation, J&J Worldwide Services, Cushman & Wakefield plc, CBRE Group, Inc., Jones Lang LaSalle Incorporated, Sodexo, Inc., Aramark, and ABM Industries Incorporated are engaged in this field, as are large original equipment manufacturers such as Carrier Global Corporation and Trane Technologies plc. In addition, we compete with several regional firms serving all or portions of the markets we target, such as BrightView Holdings, Inc., Kellermeyer Bergensons Services, LLC, SMS Assist, L.L.C., and Ferrandino & Son, Inc. Our principal competitors in the United Kingdom include CBRE Group, Inc., Bouygues UK Ltd., ISS UK Ltd., and Mitie Group PLC. The key competitive factors in the building services industry include: (a) availability of qualified personnel and managers; (b) service quality and technical expertise; (c) cost structure and the ability to control project costs; (d) price; and (e) geographic diversity. Due to our size, our technical capability and management experience, and our geographic presence, we believe our building services operations are in a strong competitive position. However, there are relatively few barriers to entry into the building services industry.

The market for providing industrial services includes large national providers, as well as numerous regional companies. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufacturers. Competitors within this industry include JVIC Catalyst Services, Universal Plant Services, Inc., Turner Industries Group, LLC, Team, Inc., Cust-O-Fab, Inc., Dunn Heat Exchangers, Inc., and Wyatt Field Service Company, LLC, among others. The key competitive factors in the industrial services market consist of: (a) availability of skilled workforce; (b) technical expertise; (c) service, quality, and ability to respond quickly; (d) price; and (e) safety record. Due to our technical capabilities, skilled workforce, and safety record, we believe that we are in a strong competitive position in the industrial services markets that we serve. Because of the complex tasks associated with turnaround projects, and the precision and cost investment required in manufacturing heat exchangers, we believe that the barriers to entry in this business are significant.

Human Capital

At December 31, 2022, we employed approximately 35,500 people, approximately 32,000 of whom were located within the United States and approximately 3,500 of whom were located in the United Kingdom.

Based on the most recent information available from our latest filing with the U.S. Equal Employment Opportunity Commission, the gender demographic of our U.S. employees was 90% male and 10% female. Additionally, based on such information, our U.S. employees had the following race and ethnicity demographics:

Employee Demographic % of Total White 69 % Hispanic / Latinx 18 % Black / African American 8 % Asian 2 % Multiracial, Native American, Native Hawaiian, and Pacific Islander 3 %

Approximately 60% of our employees are represented by various unions pursuant to approximately 450 collective bargaining agreements between our individual subsidiaries or trade associations and local unions, as well as two collective bargaining agreements that are national or regional in scope. We believe that our relations with our labor unions are generally positive.

Our ability to execute complex projects for our customers, and to perform all of our services with the excellence that makes us an industry leader, depends on our success in attracting and retaining skilled labor in a competitive market. We therefore strive to be and remain an employer of choice for the most talented employees in each of the industries and markets in which we operate. This begins with offering competitive employee compensation and benefits packages, specifically designed to meet the unique needs of each individual in our organization, which include:

•Health and Welfare Plans: All full-time employees who do not participate in union plans are offered a range of choices among medical, dental and vision plans, life, accident, dependent and disability insurance, and pre-tax health spending accounts that include employer contributions.

•Retirement Savings: We help provide our employees with financial security by offering a 401(k) Savings Plan and an Employee Stock Purchase Plan, both of which include company matching contributions.

•Degree Assistance: Eligible employees may apply for reimbursement for job-related courses or courses taken as part of a curriculum for a business or job-related degree at an accredited institution.

•Employee Assistance Program: Through our Employee Assistance Program, we offer our employees, and their dependents or household members, access to services and counseling on a variety of personal, professional, legal, and financial matters, at no cost. Most recently, we started offering college counseling services for the children of our employees.

Key to our attraction and retention of employees is our commitment to our EMCOR Values and our focus on employee safety and diversity, equity, and inclusion. Our Board of Directors and senior leadership engage in oversight and management, respectively, of our significant human capital initiatives. Our Board of Directors is regularly briefed and provides input on key human capital initiatives and metrics.

Commitment to Core Values

We are committed to our EMCOR Values of Mission First: Integrity, Discipline, and Transparency and People Always: Mutual Respect and Trust, Commitment to Safety, and Teamwork. We constantly strive to ensure these values are reflected in how we do business every day, from our corporate culture and “tone at the top,” established by our Board of Directors and management team, to the critical work performed by all of our people at every level throughout our organization. We reinforce our EMCOR Values through many ongoing initiatives. Our EMCOR Values are embodied in our policies and procedures, including our Code of Business Ethics and Conduct. We also regularly provide training on these values, both at time of hire and on an ongoing, periodic basis. In addition, to develop and reinforce our values company-wide, and empower our leaders to perform at the highest levels, senior leaders are invited to our Leadership for Results course at Babson College and our Leading with Character program at the Thayer Leadership Development Group at West Point.

Workplace Safety

We believe that our focus on employee safety and well-being is reflected in our results. In a year in which our employees worked approximately 77.5 million hours, the Company’s Total Recordable Incident Rate in 2022 was approximately 1.2, which was approximately 55% lower than the most recently available industry average of 2.70. This represents our fourteenth consecutive year with a Total Recordable Incident Rate which was less than half the industry average. Our position as an industry leader in safety begins with a strong culture of care and vigilance embodied in our EMCOR Values and is supported by a comprehensive suite of training, resources, and analytics. These include: (a) our signature Be There for Life! Zero Injuries Program and Be Vigilant! Campaign, (b) incident and injury prevention planning, including in-person and online training tools, adoption of new technology, and best practice guides available through our company intranet, (c) enterprise level reporting and analysis of leading and lagging indicators, (d) a 24-hour incident reporting hotline, and (e) a company-wide program to share and champion best safety practices across our range of businesses.

Diversity, Equity, and Inclusion

We believe that a diverse workforce is important to the long-term success of our business. We actively seek to increase the diversity of our workforce and to practice our commitment to diversity and inclusion in hiring, development, and training. This extends to our senior leadership and Board of Directors, where we require that any slate of recruited candidates for a named executive officer or other corporate officer position, and new management-supported director nominees, include individuals from underrepresented demographics. We have also designed and implemented policies and practices to promote a workplace free from discrimination, including our Affirmative Action and Equal Opportunity Policy, the implementation, effectiveness, and reporting requirements of which are overseen by our designated Affirmative Action Officer.

We strive to help all our employees realize their full potential with an equal opportunity to succeed. We work to unlock the full potential of all employees at every level through: (a) the EMCOR Manager Certificate Program, which promotes supervisory management skills, (b) our Degree Assistance Program, which provides tuition reimbursement for continuing education, and (c) the resources available to all employees on our online learning platform, the EMCOR Learning Center, which includes thousands of on-demand training courses on a wide range of topics.

In furtherance of our EMCOR Values, all EMCOR employees are required to complete diversity and inclusion training, and our current and future leaders undergo implicit association and unconscious bias training.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the SEC. These filings are available to the public over the internet at the SEC’s website at http://www.sec.gov.

Our Internet address is www.emcorgroup.com. We make available, free of charge, through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. References to our website addressed in this report are provided as a convenience and do not constitute, and should not be viewed as, an incorporation by reference of the information contained on, or available through, the website. Therefore, such information should not be considered part of this report.

Our Board of Directors has an audit committee, a compensation and personnel committee, and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers, and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, can be obtained on our website, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

Overview

We are one of the largest specialty contractors in the United States and a leading provider of electrical and mechanical construction and facilities services, building services, and industrial services. In 2021, we had revenues of approximately $9.9 billion. Our services are provided to a broad range of commercial, industrial, utility, and institutional customers through approximately 90 operating subsidiaries, which specialize principally in providing construction services relating to electrical and mechanical systems in all types of facilities and in providing various services relating to the operation, maintenance, and management of those facilities. Such operating subsidiaries are organized into the following reportable segments:

•United States electrical construction and facilities services

•United States mechanical construction and facilities services

•United States building services

•United States industrial services

•United Kingdom building services

Our operating subsidiaries offer comprehensive and diverse solutions on a broad scale and have a solid base of customers, including many long-standing relationships. We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, construction managers, developers, property managers, and other subcontractors. Our industrial services are generally provided directly to refineries and petrochemical plants.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2021 revenues, approximately 95% were generated in the United States and approximately 5% were generated in foreign countries, substantially all in the United Kingdom. In 2021, approximately 60% of our revenues were derived from our construction operations, approximately 30% of our revenues were derived from our building services operations and approximately 10% of our revenues were derived from our industrial services operations. For additional information regarding our revenues, see Note 3 - Revenue from Contracts with Customers of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

We believe that our range of service offerings, technical capability, and strong project execution, along with our safety culture and financial resources, differentiate us from our competition and position us to benefit from future capital spending by our customers. Our strategies of expanding our portfolio of service offerings for existing and potential customers and increasing or enhancing our presence in core end markets, along with our commitment to industry-leading best practices and technological and training capabilities, place us in the position to capitalize on opportunities and trends in the industries we serve and expand our operations to select new markets.

Increasingly, our services are focused on delivering sustainable energy solutions, enhancements in energy efficiency, reductions in waste and emissions, and improvements in the safety and comfort of our customers’ facilities.

The broad scope of our operations is more particularly described below. For detailed segment financial information refer to Note 18 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

Operations

United States electrical and mechanical construction and facilities services operations:

Our electrical and mechanical construction services primarily involve the design, integration, installation, start-up, operation and maintenance, and provision of services relating to:

•Systems for electrical power transmission, distribution, and generation, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems, and related switch gear and controls;

•Sustainable energy solutions such as solar, photovoltaic, and wind, as well as the installation of electric vehicle charging stations;

•Premises electrical and lighting systems, including fixtures and controls;

•Process instrumentation in the refining, chemical processing, and food processing industries;

•Low-voltage systems, such as fire alarm, security, and process control systems;

•Voice and data communications, including fiber optic and low voltage cabling, distributed antenna systems, audiovisual systems, and wireless access points;

•Roadway and transit lighting and signaling and fiber optic lines;

•Heating, ventilation, air conditioning, and refrigeration, including both traditional mechanical systems as well as geothermal solutions;

•Clean-room process ventilation systems;

•Fire protection and suppression systems;

•Plumbing, process and high-purity piping systems;

•Controls and filtration systems;

•Water and wastewater treatment systems;

•Central plant heating and cooling systems;

•Crane and rigging services;

•Millwright services; and

•Steel fabrication, erection, and welding services.

The electrical and mechanical construction services industry has experienced growth due principally to the increased content, complexity, and sophistication of electrical and mechanical systems resulting, in part, from growth in digital processing, cloud computing, and data storage. In addition, facilities of all types require extensive electrical distribution systems, sophisticated power supplies, networks of low-voltage and fiber-optic communications cabling, and various mechanical, plumbing, and fire protection and suppression systems. Moreover, the need for substantial environmental controls within a building, due to the heightened need to maintain extensive computer systems at optimal temperatures, and the demand for increased energy efficiency, have continued to expand opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Our electrical and mechanical construction services generally fall into one of three categories: (a) large installation projects, with contracts often in the multi-million dollar range, that involve: (i) the construction of manufacturing facilities, data centers, warehousing and distribution facilities, and commercial buildings, (ii) institutional and public works projects, or (iii) the fit-out of large blocks of space within commercial buildings, (b) large and medium sized capital and maintenance projects for commercial, manufacturing, pharmaceutical, healthcare, oil and gas, industrial, and petrochemical clients and (c) smaller installation projects, of a short duration, typically involving fit-out, renovation, and retrofit work. We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States electrical and mechanical construction operations accounted for about 60% of our 2021 total revenues. Of such revenues, approximately 34% were generated by our electrical construction operations and approximately 66% were generated by our mechanical construction operations.

We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for commercial purposes (such as office buildings, data centers, convention centers, sports stadiums, and shopping malls); (b) for manufacturing and industrial purposes (such as pharmaceutical plants, steel, pulp and paper mills, food processing, automotive and semiconductor manufacturing facilities, power generation (including sustainable energy solutions such as solar and wind), oil and gas refineries, and chemical processing plants); (c) for transportation purposes (such as highways, bridges, airports, and transit systems); (d) for institutional purposes (such as educational and correctional facilities and research laboratories); (e) for healthcare purposes; (f) for water and wastewater purposes; and (g) for hospitality purposes (such as resorts, hotels, and gaming facilities). Our largest projects, which typically range in size from $10 million up to and occasionally exceeding $200 million, represented approximately 38% of our electrical and mechanical construction services revenues in 2021. Depending on the size and complexity of these projects, they may span multiple years and typically require significant technical and management skills and the financial strength to obtain performance bonds, which are often a condition to bidding for and winning these projects.

Our projects of less than $10 million accounted for approximately 62% of our electrical and mechanical construction services revenues in 2021. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use, upgrade or replace aging systems, or increase energy efficiency. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, the demand for more energy efficient systems, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

United States and United Kingdom building services operations:

Our building services, which are provided to a wide range of facilities, including commercial, utility, institutional, and governmental facilities, include:

•Mobile mechanical maintenance and services for mechanical, electrical, plumbing, fire safety, and building automation systems;

•Small modification and retrofit projects;

•Program development, management, and maintenance for energy systems, including LEED Certified solutions to assist our customers in reducing energy consumption;

•Technical consulting and diagnostic services;

•Services aimed at improving indoor air quality;

•Installation and support for building systems;

•Commercial and government site-based operations and maintenance;

•Facility management, maintenance, and services;

•Floor care and janitorial services, including enhanced cleaning and sanitization services;

•Landscaping, lot sweeping, and snow removal;

•Other building services, including reception, security, and catering services;

•Vendor management and call center services;

•Military base operations support services;

•Infrastructure and building projects for federal, state, and local governmental agencies; and

•Outage services to utilities and industrial plants.

While not all of the above services are performed in both countries, we provide building services throughout the United States and United Kingdom. Our building services operations have built upon our traditional electrical and mechanical construction operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a local, regional, and national basis.

Our building services operations, which generated approximately 30% of our 2021 total revenues, provide services to owners, operators, tenants, and managers of all types of facilities both on a contractual basis for a specified period of time and on an individual task order basis. Of our building services revenues for 2021, approximately 83% were generated in the United States and approximately 17% were generated in the United Kingdom.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of their facilities, including their mechanical, electrical, building automation, voice and data, and other systems, and the need for increased reliability, energy efficiency, and air filtration and sanitization. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include federal and state governments, institutional organizations, utilities, independent power producers, healthcare providers, and major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, and manufacturing, as well as large retailers and other businesses with geographically dispersed locations.

We provide building services at a number of prominent buildings, including those that house the Secret Service, the Federal Deposit Insurance Corporation, the Government Accountability Office, and the Department of Health and Human Services, as well as other government facilities, including the NASA Jet Propulsion Laboratory. We also provide building services, as a prime contractor or a subcontractor, to U.S. military bases, including the Defense Intelligence Agency located on Joint Base Anacostia-Bolling, and are involved in a joint venture providing building services to NASA’s Armstrong Flight Research Center. The agreements pursuant to which this division provides services to the federal government are frequently for a base period and a number of option years exercisable at the sole discretion of the government, are often subject to renegotiation by the government in terms of scope of services, and are subject to termination by the government prior to the expiration of the applicable term.

United States industrial services operations:

Our industrial services are primarily provided to customers within the oil, gas, and petrochemical industries and consist of:

•Refinery turnaround planning and engineering services;

•Specialty welding services;

•Overhaul and maintenance of critical process units in refineries and petrochemical plants;

•Specialty technical services for refineries and petrochemical plants;

•Instrumentation and electrical services for energy infrastructure;

•On-site repairs, maintenance, and service of heat exchangers, towers, vessels, and piping;

•Design, manufacturing, repair, and hydro blast cleaning of shell and tube heat exchangers and related equipment; and

•Renewable energy services, including large scale solar projects, energy storage, and waste to biogas solutions.

Our industrial services business, which generated approximately 10% of our 2021 total revenues, is a recognized leader in the refinery turnaround market and has a presence in the petrochemical market. Demand for these services is highly dependent on the strength of the oil and gas and related industrial markets. Our industrial services operations perform turnaround and maintenance services for critical units of refineries and petrochemical plants to upgrade, repair, and maintain them. Such services include: (a) engineering and planning in advance of complex refinery turnarounds; (b) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers, and related mechanical equipment) during refinery and petrochemical plant shut downs; (c) replacement and new construction capital projects for refineries and petrochemical plants; (d) instrumentation and electrical services for energy infrastructure; and (e) other related specialty services such as: (i) welding (including pipe welding) and fabrication; (ii) heater, boiler, and reformer repairs and replacements; converter repair and revamps; and vessel, exchanger and tower services; (iii) tower and column repairs in refineries and petrochemical plants; (iv) installation and repair of refractory materials for critical units in process plants to protect equipment from corrosion, erosion, and extreme temperatures; and (v) acid-proofing services to protect critical components at refineries from chemical exposure. These businesses also design and manufacture highly engineered shell and tube heat exchangers and provide maintenance, repair, and cleaning services for heat exchangers both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services.

In addition to these traditional industrial services, we are working to leverage our expertise in industrial services to construct and maintain carbon capture technologies and renewable energy projects.

Competition

Across our operations, we compete with national, regional, and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

The electrical and mechanical construction services industry is highly fragmented and our competition includes thousands of small companies across the United States. In addition, there are a number of larger public companies focused on providing either electrical and/or mechanical construction services, such as APi Group Corporation, Comfort Systems USA, Inc., Dycom Industries, Inc., IES Holdings, Inc., MasTec, Inc., MYR Group, Inc., and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability, and financial strength. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure and the ability to control project costs; (e) relationships with customers; (f) price; (g) geographic diversity; (h) experience in specialized markets; (i) the ability to obtain surety bonding; and (j) adequate working capital or access to bank credit. We believe our financial position, operating results, access to bank credit and surety bonding, technical expertise, and safety record, among other factors, give us an advantage over many of our competitors. However, relatively few barriers exist to prevent entry into the electrical and mechanical construction services industry.

While the building services industry is also highly fragmented, with most competitors operating in a specific geographic region, a number of large corporations such as Amentum Services, Inc., IAP Worldwide Services, Inc., Fluor Corporation, J&J Worldwide Services, Cushman & Wakefield plc, CBRE Group, Inc., Jones Lang LaSalle Incorporated, Sodexo, Inc., Aramark, and ABM Industries Incorporated are engaged in this field, as are large original equipment manufacturers such as Carrier Global Corporation and Trane Technologies plc. In addition, we compete with several regional firms serving all or portions of the markets we target, such as BrightView Holdings, Inc., Kellermeyer Bergensons Services, LLC, SMS Assist, LLC, and Ferandino & Son, Inc. Our principal competitors in the United Kingdom include CBRE Group, Inc., Bouygues UK Ltd., ISS UK Ltd., and Mitie Group plc. The key competitive factors in the building services industry include: (a) availability of qualified personnel and managers; (b) service quality and technical expertise; (c) cost structure and the ability to control project costs; (d) price; and (e) geographic diversity. Due to our size, our technical capability and management experience, and our geographic presence, we believe our building services operations are in a strong competitive position. However, there are relatively few barriers to entry into the building services industry.

The market for providing industrial services includes large national providers, as well as numerous regional companies. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufacturers. Competitors within this industry include JVIC Catalyst Services, Universal Plant Services, Inc., Turner Industries Group, LLC, Team, Inc., Cust-O-Fab, Inc., Dunn Heat Exchangers, Inc., and Wyatt Field Service Company, LLC, among others. The key competitive factors in the industrial services market consist of: (a) availability of skilled workforce; (b) technical expertise; (c) service, quality, and ability to respond quickly; (d) price; and (e) safety record. Due to our technical capabilities, skilled workforce, and safety record, we believe that we are in a strong competitive position in the industrial services markets that we serve. Because of the complex tasks associated with turnaround projects, and the precision and cost investment required in manufacturing heat exchangers, we believe that the barriers to entry in this business are significant.

Human Capital

At December 31, 2021, we employed approximately 34,000 people, approximately 30,000 of whom were located within the United States and approximately 4,000 of whom were located in the United Kingdom.

Based on the most recent information available from our latest filing with the U.S. Equal Employment Opportunity Commission, the gender demographic of our U.S. employees was 90% male and 10% female. Additionally, based on such information, our U.S. employees had the following race and ethnicity demographics:

Employee Demographic % of Total White 70 % Hispanic / Latinx 17 % Black / African American 8 % Asian 2 % Multiracial, Native American, Native Hawaiian, and Pacific Islander 3 %

Approximately 60% of our employees are represented by various unions pursuant to nearly 450 collective bargaining agreements between our individual subsidiaries or trade associations and local unions, as well as two collective bargaining agreements that are national or regional in scope. We believe that our relations with our labor unions are generally positive.

Our ability to execute complex projects for our customers, and to perform all of our services with the excellence that makes us an industry leader, depends on our success in attracting and retaining skilled labor in a competitive market. We therefore strive to be and remain an employer of choice for the most talented employees in each of the industries and markets in which we operate. This begins with offering competitive employee compensation and benefits packages, specifically designed to meet the unique needs of each individual in our organization, which include:

•Health and Welfare Plans: All full-time employees who do not participate in union plans are offered a range of choices among medical, dental and vision plans, life, accident, dependent and disability insurance, and pre-tax health spending accounts that include employer contributions.

•Retirement Savings: We help provide our employees with financial security by offering a 401(k) Savings Plan and an Employee Stock Purchase Plan, both of which include company matching contributions.

•Degree Assistance: Eligible employees may apply for reimbursement for job-related courses or courses taken as part of a curriculum for a business or job-related degree at an accredited institution.

•Employee Assistance Program: Through our Employee Assistance Program, we offer our employees, and their dependents or household members, access to services and counseling on a variety of personal, professional, legal, and financial matters, at no cost.

Key to our attraction and retention of employees is our commitment to our EMCOR Values and our focus on employee safety and diversity, equity, and inclusion. Our Board of Directors and senior leadership engage in oversight and management, respectively, of our significant human capital initiatives. Our Board of Directors is regularly briefed and provides input on key human capital initiatives and metrics.

Commitment to Core Values

We are committed to our EMCOR Values of Mission First: Integrity, Discipline, and Transparency and People Always: Mutual Respect and Trust, Commitment to Safety, and Teamwork. We constantly strive to ensure these values are reflected in how we do business every day, from our corporate culture and “tone at the top,” established by our Board of Directors and management team, to the critical work performed by all of our people at every level throughout our organization. We reinforce our EMCOR Values through many ongoing initiatives. Our EMCOR Values are embodied in our policies and procedures, including our Code of Business Ethics and Conduct. We also regularly provide training on these values, both at time of hire and on an ongoing, periodic basis. In addition, to develop and reinforce our values company-wide, and empower our leaders to perform at the highest levels, senior leaders are invited to our Leadership for Results course at Babson College and our Leading with Character program at the Thayer Leadership Development Group at West Point.

Workplace Safety

We believe that our focus on employee safety and well-being is reflected in our results. In a year in which our employees worked a total of approximately 76 million hours, the second highest in our history, the Company’s Total Recordable Incident Rate in 2021 was approximately 1.06, which was more than 60% lower than the most recently available industry average of 2.70. This represents our thirteenth consecutive year with a Total Recordable Incident Rate which was less than half the industry average. Our position as an industry leader in safety begins with a strong culture of care and vigilance embodied in our EMCOR Values and is supported by a comprehensive suite of training, resources, and analytics. These include: (a) our signature Be There for Life! Zero Injuries Program and Be Vigilant! Campaign, (b) incident and injury prevention planning, including in-person and online training tools, adoption of new technology, and best practice guides available through our company intranet, (c) enterprise level reporting and analysis of leading and lagging indicators, (d) a 24-hour incident reporting hotline, and (e) a company-wide program to share and champion best safety practices across our range of businesses.

Diversity, Equity, and Inclusion

We believe that a diverse workforce is important to the long-term success of our business. We actively seek to increase the diversity of our workforce and to practice our commitment to diversity and inclusion in hiring, development, and training. This extends to our senior leadership and Board of Directors, where we require that any slate of candidates for a named executive officer or other corporate officer position, and new management-supported director nominees, include individuals from underrepresented demographics. We have also designed and implemented policies and practices to promote a workplace free from discrimination, including our Affirmative Action and Equal Opportunity Policy, the implementation, effectiveness, and reporting requirements of which are overseen by our designated Affirmative Action Officer.

We strive to help all our employees realize their full potential with an equal opportunity to succeed. We work to unlock the full potential of all employees at every level through: (a) the EMCOR Manager Certificate Program, which promotes supervisory management skills, (b) our Degree Assistance Program, which provides tuition reimbursement for continuing education, and (c) the resources available to all employees on our online learning platform, the EMCOR Learning Center, which includes thousands of on-demand training courses on a wide range of topics.

In furtherance of our EMCOR Values, all EMCOR employees are required to complete diversity & inclusion training, and our current and future leaders undergo implicit association and unconscious bias training.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the SEC. These filings are available to the public over the internet at the SEC’s website at http://www.sec.gov.

Our Internet address is www.emcorgroup.com. We make available, free of charge, through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. References to our website addressed in this report are provided as a convenience and do not constitute, and should not be viewed as, an incorporation by reference of the information contained on, or available through, the website. Therefore, such information should not be considered part of this report.

Our Board of Directors has an audit committee, a compensation and personnel committee, and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers, and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, can be obtained free of charge on our website, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States. In addition, we provide a number of building services and industrial services. In 2020, we had revenues of approximately $8.8 billion. Our services are provided to a broad range of commercial, industrial, utility, and institutional customers through approximately 85 operating subsidiaries. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in all types of facilities and in providing various services relating to the operation, maintenance, and management of facilities, including refineries and petrochemical plants.

Our electrical and mechanical construction services primarily involve the design, integration, installation, start-up, operation and maintenance, and provision of services relating to:

•Electrical power transmission and distribution systems;

•Premises electrical and lighting systems;

•Process instrumentation in the refining, chemical processing, food processing, and mining industries;

•Low-voltage systems, such as fire alarm, security, and process control systems;

•Voice and data communications systems;

•Roadway and transit lighting and fiber optic lines;

•Heating, ventilation, air conditioning, refrigeration, and clean-room process ventilation systems;

•Fire protection systems;

•Plumbing, process and high-purity piping systems;

•Controls and filtration systems;

•Water and wastewater treatment systems;

•Central plant heating and cooling systems;

•Crane and rigging services;

•Millwright services; and

•Steel fabrication, erection, and welding services.

Our building services, which are provided to a wide range of facilities, including commercial, utility, institutional, and governmental facilities, include:

•Commercial and government site-based operations and maintenance;

•Facility management, maintenance, and services

•Outage services to utilities and industrial plants;

•Military base operations support services;

•Mobile mechanical maintenance and services;

•Services aimed at improving indoor air quality;

•Floor care and janitorial services;

•Landscaping, lot sweeping, and snow removal;

•Other building services, including reception, security, and catering services;;

•Vendor management;

•Call center services;

•Installation and support for building systems;

•Program development, management, and maintenance for energy systems;

•Technical consulting and diagnostic services;

•Infrastructure and building projects for federal, state, and local governmental agencies and bodies; and

•Small modification and retrofit projects.

Our industrial services are primarily provided to customers within the oil, gas, and petrochemical industries and consist of:

•On-site repairs, maintenance, and service of heat exchangers, towers, vessels, and piping;

•Design, manufacturing, repair, and hydro blast cleaning of shell and tube heat exchangers and related equipment;

•Refinery turnaround planning and engineering services;

•Specialty welding services;

•Overhaul and maintenance of critical process units in refineries and petrochemical plants; and

•Specialty technical services for refineries and petrochemical plants.

We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, construction managers, developers, property managers, and other subcontractors. Our industrial services are generally provided directly to refineries and petrochemical plants. As of December 31, 2020, we had approximately 33,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2020 revenues, approximately 95% were generated in the United States and approximately 5% were generated in foreign countries, substantially all in the United Kingdom. In 2020, approximately 62% of revenues were derived from our construction operations, approximately 29% of revenues were derived from our building services operations and approximately 9% of revenues were derived from our industrial services operations.

During the third quarter of 2014, we ceased construction operations in the United Kingdom. The results of the construction operations of our United Kingdom segment for all periods are presented as discontinued operations.

The broad scope of our operations is more particularly described below. For information regarding the revenues, operating income and total assets of each of our segments with respect to each of the last three years, and our revenues and assets attributable to the United States and the United Kingdom for the last three years, see Note 19 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Operations

The electrical and mechanical construction services industry has experienced growth due principally to the increased content, complexity, and sophistication of electrical and mechanical systems resulting, in part, from growth in digital processing, and cloud computing and data storage. In addition, facilities of all types require extensive electrical distribution systems, sophisticated power supplies, networks of low-voltage and fiber-optic communications cabling, and various mechanical, plumbing, and fire protection and suppression systems. Moreover, the need for substantial environmental controls within a building, due to the heightened need to maintain extensive computer systems at optimal temperatures, and the demand for increased energy efficiency, have over the years expanded opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Our electrical and mechanical construction services primarily involve the design, integration, installation, and start-up of, and provision of services relating to: (a) electrical power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems, and related switch gear and controls; (b) premises electrical and lighting systems, including fixtures and controls; (c) process instrumentation in the refining, chemical processing, food processing, and mining industries; (d) low-voltage systems, such as fire alarm, security, and process control systems; (e) voice and data communications systems, including fiber-optic and low-voltage cabling, distributed antenna systems, and audiovisual systems; (f) roadway and transit lighting and signaling; and (g) fiber-optic lines; (h) heating, ventilation, air conditioning, refrigeration, and clean-room process ventilation systems; (i) fire protection systems; (j) plumbing, process, and high-purity piping systems; (k) controls and filtration systems; (l) water and wastewater treatment systems; (m) central plant heating and cooling systems; (n) cranes and rigging; (o) millwrighting; and (p) steel fabrication, erection, and welding.

Our electrical and mechanical construction services generally fall into one of three categories: (a) large installation projects, with contracts often in the multi-million dollar range, that involve: (i) the construction of manufacturing facilities, data centers, and commercial buildings, (ii) institutional and public works projects, or (iii) the fit-out of large blocks of space within commercial buildings, (b) large and medium sized capital and maintenance projects for commercial, manufacturing, pharmaceutical, healthcare, oil and gas, industrial, and petrochemical clients and (c) smaller installation projects, of a short duration, typically involving fit-out, renovation, and retrofit work. We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems, in several metropolitan areas. In addition, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States electrical and mechanical construction operations accounted for about 62% of our 2020 total revenues. Of such revenues, approximately 36% were generated by our electrical construction operations and approximately 64% were generated by our mechanical construction operations.

We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for commercial purposes (such as office buildings, data centers, convention centers, sports stadiums, and shopping malls); (b) for manufacturing and industrial purposes (such as pharmaceutical plants, steel, pulp and paper mills, food processing, automotive and semiconductor manufacturing facilities, power generation (including sustainable energy solutions such as solar and wind), oil and gas refineries, and chemical processing plants); (c) for transportation purposes (such as highways, bridges, airports, and transit systems); (d) for institutional purposes (such as educational and correctional facilities and research laboratories); (e) for healthcare purposes; (f) for water and wastewater purposes; and (g) for hospitality purposes (such as resorts, hotels, and gaming facilities). Our largest projects, which typically range in size from $10 million up to and occasionally exceeding $200 million, represented approximately 35% of our electrical and mechanical construction services revenues in 2020. Depending on the size and complexity of these projects, they may span multiple years and typically require significant technical and management skills and the financial strength to obtain performance bonds, which are often a condition to bidding for and winning these projects.

Our projects of less than $10 million accounted for approximately 65% of our electrical and mechanical construction services revenues in 2020. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use, replace aging systems, or increase energy efficiency. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, the demand for more energy efficient systems, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

We have a diverse customer base with many long-standing relationships. We perform construction services pursuant to contracts with owners (such as corporations, municipalities, and other governmental entities), general contractors, systems suppliers, construction managers, developers, other subcontractors, and tenants of commercial properties.

In addition to our electrical and mechanical construction services, we provide a number of building services throughout the United States and United Kingdom. Our building services operations have built upon our traditional electrical and mechanical construction operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a regional and national basis.

Our building services operations provide a broad range of services, including mobile mechanical maintenance and services for mechanical, electrical, plumbing, and building automation systems; commercial and government site-based operations and maintenance; indoor air quality improvement services; facility management, maintenance, and services, including outage services to utilities and manufacturing facilities; military base operations support services; floor care and janitorial services; landscaping, lot sweeping and snow removal; other building services, including reception, security, and catering services; vendor management; call center services; installation and support for building systems; program development, management, and maintenance with respect to energy systems; technical consulting and diagnostic services; infrastructure and building projects for federal, state, and local governmental agencies and bodies; and small modification and retrofit projects.

Our building services operations, which generated approximately 29% of our 2020 total revenues, provide services to owners, operators, tenants, and managers of all types of facilities both on a contractual basis for a specified period of time and on an individual task order basis. Of our building services revenues for 2020, approximately 83% were generated in the United States and approximately 17% were generated in the United Kingdom.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, building automation, voice and data, and other systems, and the need for increased reliability, energy efficiency, and air filtration and sanitization. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include federal and state governments, institutional organizations, utilities, independent power producers, healthcare providers, and major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, and manufacturing, as well as large retailers and other businesses with geographically dispersed locations throughout the United States.

We provide building services at a number of prominent buildings, including those that house the Secret Service, the Federal Deposit Insurance Corporation, the General Accountability Office, and the Department of Health and Human Services, as well as other government facilities, including the NASA Jet Propulsion Laboratory. We also provide building services, as a prime contractor or a subcontractor, to a number of military bases, including base operations support services to the Army’s Carlisle Barracks in Pennsylvania, and are involved in a joint venture providing building services to NASA’s Armstrong Flight Research Center. The agreements pursuant to which this division provides services to the federal government are frequently for a base period and a number of option years exercisable at the sole discretion of the government, are often subject to renegotiation by the government in terms of scope of services, and are subject to termination by the government prior to the expiration of the applicable term.

Our industrial services business, which generated approximately 9% of our 2020 total revenues, is a recognized leader in the refinery turnaround market and has a presence in the petrochemical market. Our industrial services operations perform turnaround and maintenance services for critical units of refineries and petrochemical plants to upgrade, repair, and maintain them. Such services include: (a) engineering and planning services in advance of complex refinery turnarounds; (b) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers, and related mechanical equipment) during refinery and petrochemical plant shut downs; (c) replacement and new construction capital projects for refineries and petrochemical plants; and (d) other related specialty services such as (i) welding (including pipe welding) and fabrication; (ii) heater, boiler, and reformer repairs and replacements; converter repair and revamps; and vessel, exchanger and tower services; (iii) tower and column repairs in refineries and petrochemical plants; (iv) installation and repair of refractory materials for critical units in process plants to protect equipment from corrosion, erosion, and extreme temperatures; and (v) acid-proofing services to protect critical components at refineries from chemical exposure. In addition, these businesses design and manufacture highly engineered shell and tube heat exchangers and provide maintenance, repair, and cleaning services for heat exchangers both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services. Demand for these services is highly dependent on the strength of the oil and gas and related industrial markets.

Competition

Across our operations, we compete with national, regional, and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

The electrical and mechanical construction services industry is highly fragmented and our competition includes thousands of small companies across the United States. In addition, there are a few larger public companies focused on providing either electrical and/or mechanical construction services, such as IES Holdings, Inc., Comfort Systems USA, Inc. and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability, and financial strength. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure and the ability to control project costs; (e) relationships with customers; (f) price; (g) geographic diversity; (h) experience in specialized markets; (i) the ability to obtain surety bonding; and (j) adequate working capital or access to bank credit. We believe our financial position, operating results, access to bank credit and surety bonding, technical expertise, and safety record, among other factors, give us a significant competitive advantage. However, relatively few barriers exist to prevent entry into the electrical and mechanical construction services industry.

While the building services industry is also highly fragmented, with most competitors operating in a specific geographic region, a number of large U.S. based corporations such as Amentum Services, Inc., Johnson Controls International plc., Fluor Corporation, J&J Worldwide Services, Cushman & Wakefield plc, CBRE Group, Inc., Jones Lang LaSalle Incorporated, Sodexo, Inc., Aramark Corporation, and ABM Industries Incorporated are engaged in this field, as are large original equipment manufacturers such as Carrier Global Corporation and Trane Technologies Inc. In addition, we compete with several regional firms serving all or portions of the markets we target, such as BrightView, Holdings, Inc., Kellermeyer Bergensons Services, LLC, SMS Assist, LLC, and Ferandino & Son, Inc. Our principal competitors in the United Kingdom include CBRE Group, Inc., Bouygues UK Ltd., ISS UK Ltd., and MITIE Group plc. The key competitive factors in the building services industry include: (a) availability of qualified personnel and managers; (b) service quality and technical expertise; (c) cost structure and the ability to control project costs; (d) price; and (e) geographic diversity. Due to our size, our technical capability and management experience, and our geographic presence, we believe our building services operations are in a strong competitive position. However, there are relatively few barriers to entry into the building services industry.

The market for providing industrial services includes large national providers, as well as numerous regional companies. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufactures. Competitors within this industry include JVIC Catalyst Services, Matrix Service Company, Universal Plant Services, Inc., Turner Industries, Team, Inc., Cust-O-Fab, Inc., Dunn Heat Exchangers, Inc., and Wyatt Field Service Company, among others. The key competitive factors in the industrial services market consist of: (a) availability of skilled workforce, (b) technical expertise, (c) service, quality, and ability to respond quickly, (d) price, and (e) safety record. Due to our technical capabilities, skilled workforce, and safety record, we believe that we are in a strong competitive position in the industrial services markets that we serve. Because of the complex tasks associated with turnarounds, and the precision required in manufacturing heat exchangers, we believe that the barriers to entry in this business are significant.

Human Capital

At December 31, 2020, we employed approximately 33,000 people, 29,000 of whom were located within the United States and 4,000 of whom were located in the United Kingdom.

Based on the most recent information available from our latest filing with the U.S. Equal Employment Opportunity Commission, the gender demographic of our U.S. employees was 89% male and 11% female. Additionally, based on such information, our U.S. employees had the following race and ethnicity demographics:

Employee Demographic % of Total White 69 % Hispanic / Latinx 20 % Black / African American 7 % Asian 2 % Multiracial, Native American, Native Hawaiian, and Pacific Islander 2 %

Approximately 59% of our employees are represented by various unions pursuant to approximately 400 collective bargaining agreements between our individual subsidiaries and local unions, as well as two collective bargaining agreements that are national in scope. We believe that our employee relations are generally good.

Our ability to execute complex projects for our customers, and to perform all of our services with the excellence that makes us an industry leader, depends on our success in attracting and retaining skilled labor in a competitive market. We therefore strive to be and remain an employer of choice for the most talented employees in each of the industries and markets in which we operate. This begins with offering competitive employee compensation and benefits packages, specifically designed to meet the unique needs of each individual in our diverse organization, which include:

•Health and Welfare Plans: All full-time employees who do not participate in union plans are offered a range of choices among medical, dental and vision plans, life, accident, dependent and disability insurance, and pre-tax health spending accounts that include employer contributions.

•Retirement Savings: We help provide our employees with financial security by offering a 401(k) Savings Plan and an Employee Stock Purchase Plan, both of which include company matching contributions.

•Degree Assistance: Eligible employees may apply for reimbursement for job-related courses or courses taken as part of a curriculum for a business or job-related degree at an accredited institution.

•Employee Assistance Program: Through our Employee Assistance Program, we offer our employees, and their dependents or household members, access to services and counseling on a variety of personal, professional, legal, and financial matters, at no cost.

Key to our attraction and retention of employees is our commitment to our EMCOR Values and our focus on employee safety and diversity, equity, and inclusion. Our Board of Directors and senior leadership engage in oversight and management, respectively, of our significant human capital initiatives. Our Board of Directors is regularly briefed and provides input on key human capital initiatives and metrics.

Commitment to Core Values

We are committed to our EMCOR Values of Mission First: Integrity, Discipline, and Transparency and People Always: Mutual Respect and Trust, Commitment to Safety, and Teamwork. We constantly strive to ensure these values are reflected in how we do business every day, from our corporate culture and “tone at the top,” established by our Board of Directors and management team, to the critical work performed by all of our people at every level throughout our organization. We reinforce our EMCOR Values through many ongoing initiatives. Our EMCOR Values are embodied in our policies and procedures, including our Code of Business Ethics and Conduct. We also regularly provide training on these values, both at time of hire and on an ongoing, periodic basis. In addition, to develop and reinforce our values company-wide, and empower our leaders to perform at the highest levels, senior leaders are invited to our Leadership for Results course at Babson College and our Leading with Character program at the Thayer Leadership Development Group at West Point.

Workplace Safety

We believe that our focus on employee safety and well-being is reflected in our results. In a year in which our employees worked a total of approximately 73 million hours, the second highest in our history, the Company’s Total Recordable Incident Rate in 2020 was approximately 1.20, which was nearly 60% lower than the most recently available industry average of 2.90. This represents our twelfth consecutive year with a Total Recordable Incident Rate which was less than half the industry average. Our position as an industry leader in safety begins with a strong culture of care and vigilance embodied in our EMCOR Values and is supported by a comprehensive suite of training, resources, and analytics. These include: (a) our signature Be There for Life! Zero Injuries Program and Be Vigilant! Campaign, (b) in-person and online training tools and best practice guides available through our company intranet, (c) a 24-hour incident reporting hotline, and (d) a cross-company Change the Way We Work Program to share and champion best safety practices across our range of businesses.

Diversity, Equity, and Inclusion

We believe that a diverse workforce is important to the long-term success of our business. We actively seek to increase the diversity of our workforce and to practice our commitment to diversity and inclusion in hiring, development, and training. This extends to our senior leadership and Board of Directors, where we require that any slate of candidates for a named executive officer or other corporate officer position, and new management-supported director nominees, include individuals from underrepresented demographics. We have also designed and implemented policies and practices to promote a workplace free from discrimination, including our Affirmative Action and Equal Opportunity Policy, the implementation, effectiveness, and reporting requirements of which are overseen by our designated Affirmative Action Officer.

We strive to help all our employees realize their full potential with an equal opportunity to succeed. We work to unlock the full potential of all employees at every level through: (a) the EMCOR Manager Certificate Program, which promotes supervisory management skills, (b) our Degree Assistance Program, which provides tuition reimbursement for continuing education, and (c) the resources available to all employees on our online learning platform, the EMCOR Learning Center, which includes thousands of on-demand training courses on a wide range of topics.

In furtherance of our EMCOR Values, all EMCOR employees are required to complete annual diversity & inclusion training, and our current and future leaders undergo implicit association and unconscious bias training.

Remaining Unsatisfied Performance Obligations

Our remaining unsatisfied performance obligations (“remaining performance obligations”) at December 31, 2020 were $4.59 billion. Remaining performance obligations increase with awards of new contracts and decrease as we perform work and recognize revenue on existing contracts. We include a project within our remaining performance obligations at such time as the project is awarded and agreement on contract terms has been reached. Our remaining performance obligations include amounts related to contracts for which a fixed price contract value is not assigned when a reasonable estimate of total transaction price can be made.

Remaining performance obligations include unrecognized revenues to be realized from uncompleted construction contracts. Although many of our construction contracts are subject to cancellation at the election of our customers, in accordance with industry practice, we do not limit the amount of unrecognized revenue included within remaining performance obligations for these contracts as the risk of cancellation is very low due to the inherent substantial economic penalty that our customers would incur upon cancellation or termination. We believe our reported remaining performance obligations for our construction contracts are firm and contract cancellations have not had a material adverse effect on us.

Remaining performance obligations also include unrecognized revenues expected to be realized over the remaining term of service contracts. However, to the extent a service contract includes a cancellation clause which allows for the termination of such contract by either party without a substantive penalty, the remaining contract term, and therefore, the amount of unrecognized revenues included within remaining performance obligations, is limited to the notice period required for the termination.

Our remaining performance obligations are comprised of: (a) original contract amounts, (b) change orders for which we have received written confirmations from our customers, (c) pending change orders for which we expect to receive confirmations in the ordinary course of business, (d) claim amounts that we have made against customers for which we have determined we have a legal basis under existing contractual arrangements and as to which the variable consideration constraint does not apply, and (e) other forms of variable consideration to the extent that such variable consideration has been included within the transaction price of our contracts. Such claim and other variable consideration amounts were immaterial for all periods presented.

We estimate that approximately 83% of our remaining performance obligations as of December 31, 2020 will be recognized as revenues during 2021.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC’s website at http://www.sec.gov.

Our Internet address is www.emcorgroup.com. We make available, free of charge, through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. References to our website addressed in this report are provided as a convenience and do not constitute, and should not be viewed as, an incorporation by reference of the information contained on, or available through, the website. Therefore, such information should not be considered part of this report.

Our Board of Directors has an audit committee, a compensation and personnel committee, and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers, and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, can be obtained free of charge on our website, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers, or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States. In addition, we provide a number of building services and industrial services. In 2019, we had revenues of approximately $9.2 billion. Our services are provided to a broad range of commercial, industrial, utility and institutional customers through approximately 80 operating subsidiaries and joint venture entities. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in all types of facilities and in providing various services relating to the operation, maintenance and management of facilities, including refineries and petrochemical plants.

Our electrical and mechanical construction services primarily involve the design, integration, installation, start-up, operation and maintenance, and provision of services relating to:

• Electric power transmission and distribution systems;

• Premises electrical and lighting systems;

• Process instrumentation in the refining, chemical processing, food processing and mining industries;

• Low-voltage systems, such as fire alarm, security and process control systems;

• Voice and data communications systems;

• Roadway and transit lighting and fiber optic lines;

• Heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems;

• Fire protection systems;

• Plumbing, process and high-purity piping systems;

• Controls and filtration systems;

• Water and wastewater treatment systems;

• Central plant heating and cooling systems;

• Crane and rigging services;

• Millwright services; and

• Steel fabrication, erection, and welding services.

Our building services operations, which are provided to a wide range of facilities, including commercial, utility, institutional and governmental facilities, include:

• Commercial and government site-based operations and maintenance;

• Facility maintenance and services, including reception, security and catering services;

• Outage services to utilities and industrial plants;

• Military base operations support services;

• Mobile mechanical maintenance and services;

• Floor care and janitorial services;

• Landscaping, lot sweeping and snow removal;

• Facilities management;

• Vendor management;

• Call center services;

• Installation and support for building systems;

• Program development, management and maintenance for energy systems;

• Technical consulting and diagnostic services;

• Infrastructure and building projects for federal, state and local governmental agencies and bodies; and

• Small modification and retrofit projects.

Our industrial services are primarily provided to customers within the oil and gas industry and consist of:

• On-site repairs, maintenance and service of heat exchangers, towers, vessels and piping;

• Design, manufacturing, repair and hydro blast cleaning of shell and tube heat exchangers and related equipment;

• Refinery turnaround planning and engineering services;

• Specialty welding services;

• Overhaul and maintenance of critical process units in refineries and petrochemical plants;

• Specialty technical services for refineries and petrochemical plants; and

• Construction, maintenance, and support services within the upstream and midstream sectors.

We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, construction managers, developers, property managers and other subcontractors. Our industrial services are generally provided directly to refineries and petrochemical plants. As of December 31, 2019, we had approximately 36,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2019 revenues, approximately 95% were generated in the United States and approximately 5% were generated in foreign countries, substantially all in the United Kingdom. In 2019, approximately 60% of revenues were derived from our construction operations, approximately 28% of revenues were derived from our building services operations and approximately 12% of revenues were derived from our industrial services operations.

During the third quarter of 2014, we ceased construction operations in the United Kingdom. The results of the construction operations of our United Kingdom segment for all periods are presented as discontinued operations.

The broad scope of our operations is more particularly described below. For information regarding the revenues, operating income and total assets of each of our segments with respect to each of the last three years, and our revenues and assets attributable to the United States and the United Kingdom for the last three years, see Note 19 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Operations

The electrical and mechanical construction services industry continues to experience growth due principally to the increased content, complexity, and sophistication of electrical and mechanical systems resulting, in part, from growth in digital processing, and cloud computing and data storage. In addition, facilities of all types require extensive electrical distribution systems, sophisticated power supplies, and networks of low-voltage and fiber-optic communications cabling. Moreover, the need for substantial environmental controls within a building, due to the heightened need to maintain extensive computer systems at optimal temperatures, and the demand for energy savings, have over the years expanded opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Our electrical and mechanical construction services primarily involve the design, integration, installation and start-up of, and provision of services relating to: (a) electric power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems and related switch gear and controls; (b) premises electrical and lighting systems, including fixtures and controls; (c) process instrumentation in the refining, chemical processing, food processing and mining industries; (d) low-voltage systems, such as fire alarm, security and process control systems; (e) voice and data communications systems, including fiber-optic and low-voltage cabling; (f) roadway and transit lighting and fiber-optic lines; (g) heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; (h) fire protection systems; (i) plumbing, process and high-purity piping systems; (j) controls and filtration systems; (k) water and wastewater treatment systems; (l) central plant heating and cooling systems; (m) cranes and rigging; (n) millwrighting; and (o) steel fabrication, erection and welding.

Our electrical and mechanical construction services generally fall into one of three categories: (a) large installation projects with contracts often in the multi-million dollar range that involve the construction of manufacturing and commercial buildings and institutional and public works projects or the fit-out of large blocks of space within commercial buildings, (b) large and medium sized capital and maintenance projects for manufacturing, petrochemical, oil and gas, industrial and commercial clients and (c) smaller installation projects typically involving fit-out, renovation and retrofit work.

Our United States electrical and mechanical construction operations accounted for about 60% of our 2019 total revenues. Of such revenues, approximately 40% were generated by our electrical construction operations and approximately 60% were generated by our mechanical construction operations.

We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for institutional purposes (such as educational and correctional facilities and research laboratories); (b) for manufacturing purposes (such as pharmaceutical plants, steel, pulp and paper mills, food processing, automotive and semiconductor manufacturing facilities and power generation); (c) for transportation purposes (such as highways, bridges, airports and transit systems); (d) for commercial purposes (such as office buildings, data centers, convention centers, sports stadiums and shopping malls); (e) for hospitality purposes (such as resorts, hotels and gaming facilities); (f) for water and wastewater purposes; (g) for healthcare purposes; (h) for process facilities (such as oil and gas refineries and chemical processing plants); and (i) for oil and gas pipeline compressor stations and terminal and metering facilities. Our largest projects, which typically range in size from $10.0 million up to and occasionally exceeding $150.0 million and are frequently multi-year projects, represented approximately 34% of our electrical and mechanical construction services revenues in 2019.

Our projects of less than $10.0 million accounted for approximately 66% of our electrical and mechanical construction services revenues in 2019. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

We have a broad customer base with many long-standing relationships. We perform construction services pursuant to contracts with owners (such as corporations, municipalities and other governmental entities), general contractors, systems suppliers, construction managers, developers, other subcontractors, and tenants of commercial properties. Institutional and public works projects are frequently long-term complex projects that require significant technical and management skills and the financial strength to obtain bid and performance bonds, which are often a condition to bidding for and winning these projects.

We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, in the United States, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States building services segment offers a broad range of services, including operation, maintenance and service of mechanical, electrical, plumbing, and building automation systems; commercial and government site-based operations and maintenance; facility maintenance and services, including outage services to utilities and manufacturing facilities; military base operations support services; mobile mechanical maintenance and services; floor care and janitorial services; landscaping, lot sweeping and snow removal; facilities management; vendor management; call center services; installation and support for building systems; program development, management and maintenance with respect to energy systems; technical consulting and diagnostic

services; infrastructure and building projects for federal, state and local governmental agencies and bodies; and small modification and retrofit projects.

Our building services operations, which generated approximately 28% of our 2019 total revenues, provide services to owners, operators, tenants and managers of all types of facilities both on a contractual basis for a specified period of time and on an individual task order basis. Of our 2019 building services revenues, approximately 83% were generated in the United States and approximately 17% were generated in the United Kingdom.

Our building services operations have built upon our traditional electrical and mechanical services operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a regional and national basis.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, building automation, voice and data, and other systems, and the need for increased reliability, especially in mechanical, electrical, and building automation systems. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include federal and state governments, institutional organizations, utilities, independent power producers, healthcare providers, and major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, and manufacturing, as well as large retailers and other businesses with geographically dispersed portfolios throughout the United States.

We currently provide building services in a majority of the states in the United States to commercial, industrial, institutional and governmental customers and as part of our operations are responsible for: (a) the oversight of all or most of the facilities operations, including repair and maintenance; (b) servicing, upgrade and retrofit of HVAC, electrical, plumbing and industrial piping and sheet metal systems in existing facilities; (c) interior and exterior services, including floor care and janitorial services, landscaping, lot sweeping and snow removal; (d) diagnostic and solution engineering for building systems and their components; and (e) maintenance and support services to manufacturers and power producers.

We provide building services at a number of prominent buildings, including those that house the Secret Service, the Federal Deposit Insurance Corporation, the General Accountability Office (GAO), and the Department of Health and Human Services, as well as other government facilities, including the NASA Jet Propulsion Laboratory. We also provide building services, as a prime contractor or a subcontractor, to a number of military bases, including base operations support services to the Navy National Capital Region and the Army’s Carlisle Barracks in Pennsylvania, and are involved in a joint venture providing building services to NASA’s Armstrong Flight Research Center in Edwards, California. The agreements pursuant to which this division provides services to the federal government are frequently for a base period and a number of option years exercisable at the sole discretion of the government, are often subject to renegotiation by the government in terms of scope of services, and are subject to termination by the government prior to the expiration of the applicable term.

Our United Kingdom subsidiary primarily focuses on building services and currently provides a broad range of services under multi-year agreements to public and private sector customers, including utilities, airlines, airports, real estate property managers, manufacturers, governmental agencies and the finance sector.

Our industrial services operations, which generated approximately 12% of our 2019 total revenues, is a recognized leader in the refinery turnaround market and has a growing presence in the petrochemical market. Our industrial services businesses perform a broad range of turnaround and maintenance services for critical units of refineries and petrochemical plants so as to upgrade, repair, and maintain them. Such services include turnaround and maintenance services relating to: (a) engineering and planning services in advance of complex refinery turnarounds; (b) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers and related mechanical equipment) during refinery and petrochemical plant shut downs; (c) replacement and new construction capital projects for refineries and petrochemical plants; and (d) other related specialty services such as (i) welding (including pipe welding) and fabrication; (ii) heater, boiler, and reformer repairs and replacements; converter repair and revamps; and vessel, exchanger and tower services; (iii) tower and column repairs in refineries and petrochemical plants; (iv) installation and repair of refractory materials for critical units in process plants so as to protect equipment from corrosion, erosion, and extreme temperatures; and (v) acid-proofing services to protect critical components at refineries from chemical exposure. In addition, these businesses: (a) provide maintenance, repair and cleaning services for highly engineered shell and tube heat exchangers for refineries and petrochemical plants both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services; (b) design and manufacture new highly engineered shell and tube heat exchangers; and (c) provide construction, maintenance, and support services to customers within the upstream and midstream sectors.

Competition

In our construction services, building services and industrial services businesses, we compete with national, regional and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

We believe that the electrical and mechanical construction services industry is highly fragmented and our competition includes thousands of small companies across the United States. In the United States, there are a few public companies focused on providing either electrical and/or mechanical construction services, such as Integrated Electrical Services, Inc., Comfort Systems USA, Inc. and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability and financial strength. Because we have total assets, annual revenues, access to bank credit and surety bonding, and expertise significantly greater than most of our competitors, we believe we have a significant competitive advantage over our competitors in providing electrical and mechanical construction services. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure; (e) relationships with customers; (f) geographic diversity; (g) the ability to control project costs; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital; (k) access to bank credit; and (l) price. However, there are relatively few significant barriers to entry to several types of our construction services.

While the building services industry is also highly fragmented, with most competitors operating in a specific geographic region, a number of large United States based corporations such as AECOM Technology Corporation, Johnson Controls, Inc., Fluor Corp., J&J Worldwide Services, Cushman & Wakefield Inc., CBRE Group, Inc., Jones Lang LaSalle Incorporated, Sodexo, Inc., Aramark Corporation and ABM Industries Incorporated are engaged in this field, as are large original equipment manufacturers such as Carrier Corp. and Trane Inc. In addition, we compete with several regional firms serving all or portions of the markets we target, such as Brickman Valley Crest, Inc., Kellermeyer Bergensons Services, Inc., SMS Assist, LLC and Ferandino & Sons, Inc. Our principal services competitors in the United Kingdom include CBRE Group, Inc., Bouygues UK Ltd., ISS UK Ltd., and MITIE Group plc. The key competitive factors in the building services business include price, service, quality, technical expertise, geographic scope and the availability of qualified personnel and managers. Due to our size, both financial and geographic, and our technical capability and management experience, we believe we are in a strong competitive position in the building services business. However, there are relatively few barriers to entry to most of our building services businesses.

The market for providing industrial services includes large national providers, as well as numerous regional companies. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufactures. Competitors within this industry include JV Industrial Companies Ltd., Matrix Service Company, United Plant Services, Inc., Turner Industries, Team, Inc., Cust-O-Fab, Dunn Heat, Wyatt Field Service Company, and DeepWell Energy Services, LLC, among others. The key competitive factors in the industrial services market consist of service, quality, ability to respond quickly, technical expertise, price, safety record and availability of qualified personnel. Due to our technical capabilities, safety record and skilled workforce, we believe that we are in a strong competitive position in the industrial services markets that we serve. Because of the complex tasks associated with turnarounds and the precision required in manufacturing heat exchangers, we believe that the barriers to entry in this business are significant.

Employees

At December 31, 2019, we employed approximately 36,000 people, approximately 59% of whom are represented by various unions pursuant to approximately 400 collective bargaining agreements between our individual subsidiaries and local unions. We believe that our employee relations are generally good. Only two of these collective bargaining agreements are national or regional in scope.

Remaining Unsatisfied Performance Obligations

Our remaining unsatisfied performance obligations (“remaining performance obligations”) at December 31, 2019 were $4.04 billion. Remaining performance obligations increase with awards of new contracts and decrease as we perform work and recognize revenue on existing contracts. We include a project within our remaining performance obligations at such time as the project is awarded and agreement on contract terms has been reached. Our remaining performance obligations include amounts related to contracts for which a fixed price contract value is not assigned when a reasonable estimate of total transaction price can be made.

Remaining performance obligations include unrecognized revenues to be realized from uncompleted construction contracts. Although many of our construction contracts are subject to cancellation at the election of our customers, in accordance with industry practice, we do not limit the amount of unrecognized revenue included within remaining performance obligations for these contracts due to the inherent substantial economic penalty that would be incurred by our customers upon cancellation. We believe our

reported remaining performance obligations for our construction contracts are firm and contract cancellations have not had a material adverse effect on us.

Remaining performance obligations also include unrecognized revenues expected to be realized over the remaining term of service contracts. However, to the extent a service contract includes a cancellation clause which allows for the termination of such contract by either party without a substantive penalty, the remaining contract term, and therefore, the amount of unrecognized revenues included within remaining performance obligations, is limited to the notice period required for the termination.

Our remaining performance obligations are comprised of: (a) original contract amounts, (b) change orders for which we have received written confirmations from our customers, (c) pending change orders for which we expect to receive confirmations in the ordinary course of business, (d) claim amounts that we have made against customers for which we have determined we have a legal basis under existing contractual arrangements and as to which the variable consideration constraint does not apply, and (e) other forms of variable consideration to the extent that such variable consideration has been included within the transaction price of our contracts. Such claim and other variable consideration amounts were immaterial for all periods presented.

We estimate that approximately 84% of our remaining performance obligations as of December 31, 2019 will be recognized as revenues during 2020.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC’s website at http://www.sec.gov. You may also read and copy any document we file at the SEC’s Public Reference Room located at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the Public Reference Room.

Our Internet address is www.emcorgroup.com. We make available free of charge through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. References to our website addressed in this report are provided as a convenience and do not constitute, and should not be viewed as, an incorporation by reference of the information contained on, or available through, the website. Therefore, such information should not be considered part of this report.

Our Board of Directors has an audit committee, a compensation and personnel committee and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, can be obtained free of charge on our website, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States. In addition, we provide a number of building services and industrial services. In 2018, we had revenues of approximately $8.1 billion. Our services are provided to a broad range of commercial, industrial, utility and institutional customers through approximately 80 operating subsidiaries and joint venture entities. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in all types of facilities and in providing various services relating to the operation, maintenance and management of facilities, including refineries and petrochemical plants.

Our electrical and mechanical construction services primarily involve the design, integration, installation, start-up, operation and maintenance, and provision of services relating to:

• Electric power transmission and distribution systems;

• Premises electrical and lighting systems;

• Process instrumentation in the refining, chemical processing, food processing and mining industries;

• Low-voltage systems, such as fire alarm, security and process control systems;

• Voice and data communications systems;

• Roadway and transit lighting and fiber optic lines;

• Heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems;

• Fire protection systems;

• Plumbing, process and high-purity piping systems;

• Controls and filtration systems;

• Water and wastewater treatment systems;

• Central plant heating and cooling systems;

• Crane and rigging services;

• Millwright services; and

• Steel fabrication, erection, and welding services.

Our building services operations, which are provided to a wide range of facilities, including commercial, utility, institutional and governmental facilities, include:

• Commercial and government site-based operations and maintenance;

• Facility maintenance and services, including reception, security and catering services;

• Outage services to utilities and industrial plants;

• Military base operations support services;

• Mobile mechanical maintenance and services;

• Floor care and janitorial services;

• Landscaping, lot sweeping and snow removal;

• Facilities management;

• Vendor management;

• Call center services;

• Installation and support for building systems;

• Program development, management and maintenance for energy systems;

• Technical consulting and diagnostic services;

• Infrastructure and building projects for federal, state and local governmental agencies and bodies; and

• Small modification and retrofit projects.

Our industrial services are provided to refineries and petrochemical plants and include:

• On-site repairs, maintenance and service of heat exchangers, towers, vessels and piping;

• Design, manufacturing, repair and hydro blast cleaning of shell and tube heat exchangers and related equipment;

• Refinery turnaround planning and engineering services;

• Specialty welding services;

• Overhaul and maintenance of critical process units in refineries and petrochemical plants; and

• Specialty technical services for refineries and petrochemical plants.

We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, construction managers, developers, property managers and other subcontractors. Our industrial services are generally provided directly to refineries and petrochemical plants. Worldwide, as of December 31, 2018, we had approximately 33,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2018 revenues, approximately 95% were generated in the United States and approximately 5% were generated in foreign countries, substantially all in the United Kingdom. In 2018, approximately 61% of revenues were derived from our construction operations, approximately 28% of revenues were derived from our building services operations and approximately 11% of revenues were derived from our industrial services operations.

During the third quarter of 2014, we ceased construction operations in the United Kingdom. The results of the construction operations of our United Kingdom segment for all periods are presented as discontinued operations.

The broad scope of our operations is more particularly described below. For information regarding the revenues, operating income and total assets of each of our segments with respect to each of the last three years, and our revenues and assets attributable to the United States and the United Kingdom for the last three years, see Note 18 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Operations

The electrical and mechanical construction services industry has grown over the years due principally to the increased content, complexity and sophistication of electrical and mechanical systems, as well as the installation of more technologically advanced voice and data communications, lighting, and environmental control systems in all types of facilities, in large part due to the integration of digital processing and information technology. For these reasons, buildings need extensive electrical distribution systems. In addition, advanced voice and data communication systems require sophisticated power supplies and extensive low-voltage and fiber-optic communications cabling. Moreover, the need for substantial environmental controls within a building, due to the heightened need for climate control to maintain extensive computer systems at optimal temperatures, and the demand for energy savings and environmental controls in individual spaces have over the years expanded opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Our electrical and mechanical construction services primarily involve the design, integration, installation and start-up of, and provision of services relating to: (a) electric power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems and related switch gear and controls; (b) premises electrical and lighting systems, including fixtures and controls; (c) process instrumentation in the refining, chemical processing, food processing and mining industries; (d) low-voltage systems, such as fire alarm, security and process control systems; (e) voice and data communications systems, including fiber-optic and low-voltage cabling; (f) roadway and transit lighting and fiber-optic lines; (g) heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; (h) fire protection systems; (i) plumbing, process and high-purity piping systems; (j) controls and filtration systems; (k) water and wastewater treatment systems; (l) central plant heating and cooling systems; (m) cranes and rigging; (n) millwrighting; and (o) steel fabrication, erection and welding.

Our electrical and mechanical construction services generally fall into one of three categories: (a) large installation projects with contracts often in the multi-million dollar range that involve construction of manufacturing and commercial buildings and institutional and public works projects or the fit-out of large blocks of space within commercial buildings, (b) large and medium sized capital and maintenance projects for manufacturing, petrochemical, oil, industrial and commercial clients and (c) smaller installation projects typically involving fit-out, renovation and retrofit work.

Our United States electrical and mechanical construction operations accounted for about 61% of our 2018 worldwide revenues. Of such revenues, approximately 39% were generated by our electrical construction operations and approximately 61% were generated by our mechanical construction operations.

We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for institutional purposes (such as educational and correctional facilities and research laboratories); (b) for manufacturing purposes (such as pharmaceutical plants, steel, pulp and paper mills, chemical, food, automotive and semiconductor manufacturing facilities and power generation); (c) for transportation purposes (such as highways, bridges, airports and transit systems); (d) for commercial purposes (such as office buildings, data centers, convention centers, sports stadiums and shopping malls); (e) for hospitality purposes (such as resorts, hotels and gaming facilities); (f) for water and wastewater purposes; (g) for healthcare purposes; (h) for process facilities (such as oil and gas refineries and chemical processing plants); and (i) for oil and gas pipeline compressor stations and terminal and metering facilities. Our largest projects, which typically range in size from $10.0 million up to and occasionally exceeding $150.0 million and are frequently multi-year projects, represented approximately 30% of our worldwide construction services revenues in 2018.

Our projects of less than $10.0 million accounted for approximately 70% of our worldwide construction services revenues in 2018. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

We have a broad customer base with many long-standing relationships. We perform construction services pursuant to contracts with owners (such as corporations, municipalities and other governmental entities), general contractors, systems suppliers, construction managers, developers, other subcontractors and tenants of commercial properties. Institutional and public works projects are frequently long-term complex projects that require significant technical and management skills and the financial strength to obtain bid and performance bonds, which are often a condition to bidding for and winning these projects.

We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, in the United States, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States building services segment offers a broad range of services, including operation, maintenance and service of electrical and mechanical systems; commercial and government site-based operations and maintenance; facility maintenance and services, including outage services to utilities and manufacturing facilities; military base operations support services; mobile mechanical maintenance and services; floor care and janitorial services; landscaping, lot sweeping and snow removal; facilities management; vendor management; call center services; installation and support for building systems; program development,

management and maintenance with respect to energy systems; technical consulting and diagnostic services; infrastructure and building projects for federal, state and local governmental agencies and bodies; and small modification and retrofit projects.

Our building services operations, which generated approximately 28% of our 2018 worldwide revenues, provide services to owners, operators, tenants and managers of all types of facilities both on a contractual basis for a specified period of time and on an individual task order basis. Of our 2018 building services revenues, approximately 82% were generated in the United States and approximately 18% were generated in the United Kingdom.

Our building services operations have built upon our traditional electrical and mechanical services operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a regional and national basis.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, voice and data and other systems, and the need for increased reliability, especially in electrical and mechanical systems. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include federal and state governments, institutional organizations, utilities, independent power producers, healthcare providers, and major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, and manufacturing, as well as large retailers and other businesses with geographically dispersed portfolios throughout the United States.

We currently provide building services in a majority of the states in the United States to commercial, industrial, institutional and governmental customers and as part of our operations are responsible for: (a) the oversight of all or most of the facilities operations, including repair and maintenance; (b) servicing, upgrade and retrofit of HVAC, electrical, plumbing and industrial piping and sheet metal systems in existing facilities; (c) interior and exterior services, including floor care and janitorial services, landscaping, lot sweeping and snow removal; (d) diagnostic and solution engineering for building systems and their components; and (e) maintenance and support services to manufacturers and power producers.

We provide building services at a number of preeminent buildings, including those that house the Secret Service, the Federal Deposit Insurance Corporation, the National Foreign Affairs Training Center, and the Department of Health and Human Services, as well as other government facilities, including the NASA Jet Propulsion Laboratory. We also provide building services to a number of military bases, including base operations support services to the Navy National Capital Region and the Army’s Fort Huachuca in Arizona, and are involved in a joint venture providing building services to NASA’s Armstrong Flight Research Center in Edwards, California. The agreements pursuant to which this division provides services to the federal government are frequently for a base period and a number of option years exercisable at the sole discretion of the government, are often subject to renegotiation by the government in terms of scope of services, and are subject to termination by the government prior to the expiration of the applicable term.

Our United Kingdom subsidiary primarily focuses on building services and currently provides a broad range of services under multi-year agreements to public and private sector customers, including utilities, airlines, airports, real estate property managers, manufacturers, governmental agencies and the finance sector.

Our industrial services business, which generated approximately 11% of our 2018 worldwide revenues, is a recognized leader in the refinery turnaround market and has a growing presence in the petrochemical market. Our industrial services business: (a) provides maintenance, repair and cleaning services for highly engineered shell and tube heat exchangers for refineries and petrochemical plants both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services, and (b) designs and manufactures new highly engineered shell and tube heat exchangers. We also perform a broad range of turnaround and maintenance services for critical units of refineries so as to upgrade, repair and maintain them. Such services include turnaround and maintenance services relating to: (i) engineering and planning services in advance of complex refinery turnarounds; (ii) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers and related mechanical equipment) during refinery and petrochemical plant shut downs; (iii) replacement and new construction capital projects for refineries and petrochemical plants; and (iv) other related specialty services such as (a) welding (including pipe welding) and fabrication; (b) heater, boiler, and reformer repairs and replacements; converter repair and revamps; and vessel, exchanger and tower services; (c) tower and column repairs in refineries and petrochemical facilities; (d) installation and repair of refractory materials for critical units in process plants so as to protect equipment from corrosion, erosion, and extreme temperatures; and (e) acid-proofing services to protect critical components at refineries from chemical exposure.

Competition

In our construction services, building services and industrial services businesses, we compete with national, regional and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

We believe that the electrical and mechanical construction services industry is highly fragmented and our competition includes thousands of small companies across the United States. In the United States, there are a few public companies focused on providing either electrical and/or mechanical construction services, such as Integrated Electrical Services, Inc., Comfort Systems USA, Inc. and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability and financial strength. Because we have total assets, annual revenues, access to bank credit and surety bonding, and expertise significantly greater than most of our competitors, we believe we have a significant competitive advantage over our competitors in providing electrical and mechanical construction services. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure; (e) relationships with customers; (f) geographic diversity; (g) the ability to control project costs; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital; (k) access to bank credit; and (l) price. However, there are relatively few significant barriers to entry to several types of our construction services business.

While the building services industry is also highly fragmented, with most competitors operating in a specific geographic region, a number of large United States based corporations such as AECOM Technology Corporation, Johnson Controls, Inc., Fluor Corp., J&J Worldwide Services, Cushman & Wakefield Inc., CB Richard Ellis, Inc., Jones Lang LaSalle Incorporated, Sodexo, Inc., Aramark Corporation and ABM Industries Incorporated are engaged in this field, as are large original equipment manufacturers such as Carrier Corp. and Trane Inc. In addition, we compete with several regional firms serving all or portions of the markets we target, such as Brickman Valley Crest, Inc., Kellermeyer Bergensons Services, Inc., SMS Assist, LLC and Ferandino & Sons, Inc. Our principal services competitors in the United Kingdom include ISS UK Ltd. and MITIE Group plc. The key competitive factors in the building services business include price, service, quality, technical expertise, geographic scope and the availability of qualified personnel and managers. Due to our size, both financial and geographic, and our technical capability and management experience, we believe we are in a strong competitive position in the building services business. However, there are relatively few barriers to entry to most of our building services businesses.

In our industrial services business, we are one of the leading North American providers of maintenance and repair services for, and manufacturing of, highly engineered shell and tube heat exchangers and related equipment and a leader in providing specialized services to refineries and petrochemical plants. The market for providing these services and products to refineries and petrochemical plants is highly fragmented and includes large national industrial services providers, as well as numerous regional companies, including JV Industrial Companies Ltd., Matrix Service Company, Starcon, Turner Industries, Team, Inc., Cust-O-Fab, Dunn Heat, and Wyatt Field Service Company, among others. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufacturers. The key competitive factors in the industrial services market include service, quality, ability to respond quickly, technical expertise, price, safety record and availability of qualified personnel. Due to our technical capabilities, safety record and skilled workforce, we believe that we are in a strong competitive position in the industrial services markets that we serve. Because of the complex tasks associated with turnarounds and the precision required in manufacturing heat exchangers, we believe that the barriers to entry in this business are significant.

Employees

At December 31, 2018, we employed approximately 33,000 people, approximately 57% of whom are represented by various unions pursuant to approximately 400 collective bargaining agreements between our individual subsidiaries and local unions. We believe that our employee relations are generally good. Only two of these collective bargaining agreements are national or regional in scope.

Remaining Unsatisfied Performance Obligations

Our remaining unsatisfied performance obligations (“remaining performance obligations”) at December 31, 2018 were $3.96 billion. Remaining performance obligations increase with awards of new contracts and decrease as we perform work and recognize revenue on existing contracts. We include a project within our remaining performance obligations at such time as the project is awarded and agreement on contract terms has been reached. Our remaining performance obligations include amounts related to contracts for which a fixed price contract value is not assigned when a reasonable estimate of total transaction price can be made.

Remaining performance obligations include unrecognized revenues to be realized from uncompleted construction contracts. Although many of our construction contracts are subject to cancellation at the election of our customers, in accordance with industry practice, we do not limit the amount of unrecognized revenue included within remaining performance obligations due to the

inherent substantial economic penalty that would be incurred by our customers upon cancellation. We believe our reported remaining performance obligations for our construction contracts are firm and contract cancellations have not had a material adverse effect on us.

Remaining performance obligations also include unrecognized revenues expected to be realized over the remaining term of service contracts. However, to the extent a service contract includes a cancellation clause which allows for the termination of such contract by either party without a substantive penalty, the remaining contract term, and therefore, the amount of unrecognized revenues included within remaining performance obligations, is limited to the notice period required for the termination.

Our remaining performance obligations are comprised of: (a) original contract amounts, (b) change orders for which we have received written confirmations from our customers, (c) pending change orders for which we expect to receive confirmations in the ordinary course of business, (d) claim amounts that we have made against customers for which we have determined we have a legal basis under existing contractual arrangements and as to which the variable consideration constraint does not apply, and (e) other forms of variable consideration to the extent that such variable consideration has been included within the transaction price of our contracts. Such claim and other variable consideration amounts were immaterial for all periods presented.

We estimate that 83% of our remaining performance obligations as of December 31, 2018 will be recognized as revenues during 2019.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC’s website at http://www.sec.gov. You may also read and copy any document we file at the SEC’s Public Reference Room located at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the Public Reference Room.

Our Internet address is www.emcorgroup.com. We make available free of charge through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. References to our website addressed in this report are provided as a convenience and do not constitute, and should not be viewed as, an incorporation by reference of the information contained on, or available through, the website. Therefore, such information should not be considered part of this report.

Our Board of Directors has an audit committee, a compensation and personnel committee and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, can be obtained free of charge on our website, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States. In addition, we provide a number of building services and industrial services. In 2017, we had revenues of approximately $7.7 billion. Our services are provided to a broad range of commercial, industrial, utility and institutional customers through approximately 75 operating subsidiaries and joint venture entities. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in all types of facilities and in providing various services relating to the operation, maintenance and management of facilities, including refineries and petrochemical plants.

We design, integrate, install, start-up, operate and maintain various electrical and mechanical systems, including:

• Electric power transmission and distribution systems;

• Premises electrical and lighting systems;

• Process instrumentation in the refining, chemical process, food process and mining industries;

• Low-voltage systems, such as fire alarm, security and process control systems;

• Voice and data communications systems;

• Roadway and transit lighting and fiber optic lines;

• Heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems;

• Fire protection systems;

• Plumbing, process and high-purity piping systems;

• Controls and filtration systems;

• Water and wastewater treatment systems;

• Central plant heating and cooling systems;

• Crane and rigging services;

• Millwright services; and

• Steel fabrication, erection, and welding services.

Our building services operations, which are provided to a wide range of facilities, including commercial, utility, institutional and governmental facilities, include:

• Commercial and government site-based operations and maintenance;

• Facility maintenance and services, including reception, security and catering services;

• Outage services to utilities and industrial plants;

• Military base operations support services;

• Mobile mechanical maintenance and services;

• Floor care and janitorial services;

• Landscaping, lot sweeping and snow removal;

• Facilities management;

• Vendor management;

• Call center services;

• Installation and support for building systems;

• Program development, management and maintenance for energy systems;

• Technical consulting and diagnostic services;

• Infrastructure and building projects for federal, state and local governmental agencies and bodies; and

• Small modification and retrofit projects.

Our industrial services are provided to refineries and petrochemical plants and include:

• On-site repairs, maintenance and service of heat exchangers, towers, vessels and piping;

• Design, manufacturing, repair and hydro blast cleaning of shell and tube heat exchangers and related equipment;

• Refinery turnaround planning and engineering services;

• Specialty welding services;

• Overhaul and maintenance of critical process units in refineries and petrochemical plants; and

• Specialty technical services for refineries and petrochemical plants.

We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, property managers and other subcontractors. Our industrial services are generally provided directly to refineries and petrochemical plants. Worldwide, as of December 31, 2017, we had approximately 32,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2017 revenues, approximately 96% were generated in the United States and approximately 4% were generated in foreign countries, substantially all in the United Kingdom. In 2017, approximately 63% of revenues were derived from our construction operations, approximately 27% of revenues were derived from our building services operations and approximately 10% of revenues were derived from our industrial services operations.

During the third quarter of 2014, we ceased construction operations in the United Kingdom. The results of the construction operations of our United Kingdom segment for all periods are presented as discontinued operations.

The broad scope of our operations is more particularly described below. For information regarding the revenues, operating income and total assets of each of our segments with respect to each of the last three years, and our revenues and assets attributable to the United States and the United Kingdom for the last three years, see Note 17 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Operations

The electrical and mechanical construction services industry has grown over the years due principally to the increased content, complexity and sophistication of electrical and mechanical systems, as well as the installation of more technologically advanced voice and data communications, lighting, and environmental control systems in all types of facilities, in large part due to the integration of digital processing and information technology. For these reasons, buildings need extensive electrical distribution systems. In addition, advanced voice and data communication systems require sophisticated power supplies and extensive low-voltage and fiber-optic communications cabling. Moreover, the need for substantial environmental controls within a building, due to the heightened need for climate control to maintain extensive computer systems at optimal temperatures, and the demand for energy savings and environmental controls in individual spaces have over the years expanded opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Electrical and mechanical construction services primarily involve the design, integration, installation and start-up of, and provision of services relating to: (a) electric power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems and related switch gear and controls; (b) premises electrical and lighting systems, including fixtures and controls; (c) process instrumentation in the refining, chemical process, food process and mining industries; (d) low-voltage systems, such as fire alarm, security and process control systems; (e) voice and data communications systems, including fiber-optic and low-voltage cabling; (f) roadway and transit lighting and fiber-optic lines; (g) heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; (h) fire protection systems; (i) plumbing, process and high-purity piping systems; (j) controls and filtration systems; (k) water and wastewater treatment systems; (l) central plant heating and cooling systems; (m) cranes and rigging; (n) millwrighting; and (o) steel fabrication, erection and welding.

Electrical and mechanical construction services generally fall into one of three categories: (a) large installation projects with contracts often in the multi-million dollar range that involve construction of manufacturing and commercial buildings and institutional and public works projects or the fit-out of large blocks of space within commercial buildings, (b) large and medium sized capital and maintenance projects for manufacturing, petrochemical, oil, industrial and commercial clients and (c) smaller installation projects typically involving fit-out, renovation and retrofit work.

Our United States electrical and mechanical construction operations accounted for about 63% of our 2017 revenues. Of such revenues, approximately 38% were generated by our electrical construction operations and approximately 62% were generated by our mechanical construction operations.

We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for institutional purposes (such as educational and correctional facilities and research laboratories); (b) for manufacturing purposes (such as pharmaceutical plants, steel, pulp and paper mills, chemical, food, automotive and semiconductor manufacturing facilities and power generation); (c) for transportation purposes (such as highways, bridges, airports and transit systems); (d) for commercial purposes (such as office buildings, data centers, convention centers, sports stadiums and shopping malls); (e) for hospitality purposes (such as resorts, hotels and casinos); (f) for water and wastewater purposes; (g) for healthcare purposes; (h) for process facilities (such as oil and gas refineries and chemical processing plants); and (i) for oil and gas pipeline compressor stations and terminal and metering facilities. Our largest projects, which typically range in size from $10.0 million up to and occasionally exceeding $150.0 million and are frequently multi-year projects, represented approximately 30% of our worldwide construction services revenues in 2017.

Our projects of less than $10.0 million accounted for approximately 70% of our worldwide construction services revenues in 2017. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

We have a broad customer base with many long-standing relationships. We perform construction services pursuant to contracts with owners (such as corporations, municipalities and other governmental entities), general contractors, systems suppliers, construction managers, developers, other subcontractors and tenants of commercial properties. Institutional and public works projects are frequently long-term complex projects that require significant technical and management skills and the financial strength to obtain bid and performance bonds, which are often a condition to bidding for and winning these projects.

We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, in the United States, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States building services segment offers a broad range of services, including operation, maintenance and service of electrical and mechanical systems; commercial and government site-based operations and maintenance; facility maintenance and services, including outage services to utilities and manufacturing facilities; military base operations support services; mobile mechanical maintenance and services; floor care and janitorial services; landscaping, lot sweeping and snow removal; facilities management; vendor management; call center services; installation and support for building systems; program development,

management and maintenance with respect to energy systems; technical consulting and diagnostic services; infrastructure and building projects for federal, state and local governmental agencies and bodies; and small modification and retrofit projects.

Our building services operations, which generated approximately 27% of our 2017 revenues, provide services to owners, operators, tenants and managers of all types of facilities both on a contractual basis for a specified period of time and on an individual task order basis. Of our 2017 building services revenues, approximately 84% were generated in the United States and approximately 16% were generated in the United Kingdom.

Our building services operations have built upon our traditional electrical and mechanical services operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a regional and national basis.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, voice and data and other systems, and the need for increased reliability, especially in electrical and mechanical systems. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include federal and state governments, institutional organizations, utilities, independent power producers, healthcare providers, and major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, publishing and other manufacturing, and large retailers and other businesses with geographically dispersed portfolios throughout the United States.

We currently provide building services in a majority of the states in the United States to commercial, industrial, institutional and governmental customers and as part of our operations are responsible for: (a) the oversight of all or most of the facilities operations of a business, including operation and maintenance; (b) servicing, upgrade and retrofit of HVAC, electrical, plumbing and industrial piping and sheet metal systems in existing facilities; (c) interior and exterior services, including floor care and janitorial services, landscaping, lot sweeping and snow removal; (d) diagnostic and solution engineering for building systems and their components; and (e) maintenance and support services to manufacturers and power producers.

In the Washington D.C. metropolitan area, we provide building services at a number of preeminent buildings, including those that house the Secret Service, the Federal Deposit Insurance Corporation, the National Foreign Affairs Training Center, and the Department of Health and Human Services, as well as other government facilities, including the NASA Jet Propulsion Laboratory in Pasadena, California. We also provide building services to a number of military bases, including base operations support services to the Navy National Capital Region and the Army’s Fort Huachuca in Arizona, and are involved in a joint venture providing building services to NASA’s Armstrong Flight Research Center in Edwards, California. The agreements pursuant to which this division provides services to the federal government are frequently for a base year and a number of option years exercisable at the sole discretion of the government, are often subject to renegotiation by the government in terms of scope of services, and are subject to termination by the government prior to the expiration of the applicable term.

Our United Kingdom subsidiary primarily focuses on building services and currently provides a broad range of services under multi-year agreements to public and private sector customers, including utilities, airlines, airports, real estate property managers, manufacturers, governmental agencies and the finance sector.

Our industrial services business, which generated approximately 10% of our 2017 revenues, is a recognized leader in the refinery turnaround market and has a growing presence in the petrochemical market. Our industrial services business: (a) provides after-market maintenance, repair and cleaning services for highly engineered shell and tube heat exchangers for refineries and petrochemical plants both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services, and (b) designs and manufactures new highly engineered shell and tube heat exchangers. We also perform a broad range of turnaround and maintenance services for critical units of refineries so as to upgrade, repair and maintain them. Such services include turnaround and maintenance services relating to: (i) engineering and planning services in advance of complex refinery turnarounds; (ii) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers and related mechanical equipment) during refinery and petrochemical plant shut downs; (iii) replacement and new construction capital projects for refineries and petrochemical plants; and (iv) other related specialty services such as (a) welding (including pipe welding) and fabrication; heater, boiler, and reformer repairs and replacements; converter repair and revamps; and vessel, exchanger and tower services; (b) tower and column repairs in refineries and petrochemical facilities; (c) installation and repair of refractory materials for critical units in process plants so as to protect equipment from corrosion, erosion, and extreme temperatures; and (d) acid-proofing services to protect critical components at refineries from chemical exposure.

Competition

In our construction services, building services and industrial services businesses, we compete with national, regional and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

We believe that the electrical and mechanical construction services businesses are highly fragmented and our competition includes thousands of small companies across the United States. In the United States, there are a few public companies focused on providing either electrical and/or mechanical construction services, such as Integrated Electrical Services, Inc., Comfort Systems USA, Inc. and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability and financial strength. Because we have total assets, annual revenues, access to bank credit and surety bonding, and expertise significantly greater than most of our competitors, we believe we have a significant competitive advantage over our competitors in providing electrical and mechanical construction services. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure; (e) relationships with customers; (f) geographic diversity; (g) the ability to control project costs; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital; (k) access to bank credit; and (l) price. However, there are relatively few significant barriers to entry to several types of our construction services business.

While the building services business is also highly fragmented, with most competitors operating in a specific geographic region, a number of large United States based corporations such as AECOM Technology Corporation, Johnson Controls, Inc., Fluor Corp., J&J Worldwide Services, Cushman & Wakefield Inc., CB Richard Ellis, Inc., Jones Lang LaSalle Incorporated, Sodexo, Inc., Aramark Corporation and ABM Industries Incorporated are engaged in this field, as are large original equipment manufacturers such as Carrier Corp. and Trane Inc. In addition, we compete with several regional firms serving all or portions of the markets we target, such as Brickman Valley Crest, Inc., Kellermeyer Bergensons Services, Inc., SMS Assist, LLC and Ferandino & Sons, Inc. Our principal services competitors in the United Kingdom include ISS UK Ltd. and MITIE Group plc. The key competitive factors in the building services business include price, service, quality, technical expertise, geographic scope and the availability of qualified personnel and managers. Due to our size, both financial and geographic, and our technical capability and management experience, we believe we are in a strong competitive position in the building services business. However, there are relatively few barriers to entry to most of our building services businesses.

In our industrial services business, we are one of the leading North American providers of after-market maintenance and repair services for, and manufacturing of, highly engineered shell and tube heat exchangers and related equipment and a leader in providing specialized services to refineries and petrochemical plants. The market for providing these services and products to refineries and petrochemical plants is highly fragmented and includes large national industrial services providers, as well as numerous regional companies, including JV Industrial Companies Ltd., Matrix Service Company, Starcon, Turner Industries, Team, Inc., Cust-O-Fab, Dunn Heat, and Wyatt Field Service Company. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufacturers. The key competitive factors in the industrial services market include service, quality, ability to respond quickly, technical expertise, price, safety record and availability of qualified personnel. Due to our technical capabilities, safety record and skilled workforce, we believe that we are in a strong competitive position in the industrial services market we serve. Because of the complex tasks associated with turnarounds and the precision required in the manufacture of heat exchangers, we believe that the barriers to entry in this business are significant.

Employees

At December 31, 2017, we employed approximately 32,000 people, approximately 57% of whom are represented by various unions pursuant to approximately 400 collective bargaining agreements between our individual subsidiaries and local unions. We believe that our employee relations are generally good. Only two of these collective bargaining agreements are national or regional in scope.

Backlog

Our backlog at December 31, 2017 was $3.79 billion compared to $3.90 billion of backlog at December 31, 2016. Backlog increases with awards of new contracts and decreases as we perform work on existing contracts. Backlog is not a term recognized under United States generally accepted accounting principles; however, it is a common measurement used in our industry. We include a project within our backlog at such time as a contract is awarded and agreement on contract terms has been reached. Backlog includes unrecognized revenues to be realized from uncompleted construction contracts plus unrecognized revenues expected to be realized over the remaining term of services contracts. However, we do not include in backlog contracts for which we are paid on a time and material basis and a fixed amount cannot be determined, and if the remaining term of a services contract exceeds 12 months, the unrecognized revenues attributable to such contract included in backlog are limited to only the next 12

months of revenues provided for in the contract award. Our backlog also includes amounts related to services contracts for which a fixed price contract value is not assigned when a reasonable estimate of total revenues can be made from budgeted amounts agreed to with our customers. Our backlog is comprised of: (a) original contract amounts, (b) change orders for which we have received written confirmations from our customers, (c) pending change orders for which we expect to receive confirmations in the ordinary course of business and (d) claim amounts that we have made against customers for which we have determined we have a legal basis under existing contractual arrangements and as to which we consider recovery to be probable. Such claim amounts were immaterial for all periods presented. Our backlog does not include anticipated revenues from unconsolidated joint ventures or variable interest entities nor anticipated revenues from pass-through costs on contracts for which we are acting in the capacity of an agent and which are reported on the net basis. We believe our backlog is firm, although many contracts are subject to cancellation at the election of our customers. Historically, cancellations have not had a material adverse effect on us. We estimate that 85% of our backlog as of December 31, 2017 will be recognized as revenues during 2018.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC’s website at http://www.sec.gov. You may also read and copy any document we file at the SEC’s Public Reference Room located at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the Public Reference Room.

Our Internet address is www.emcorgroup.com. We make available free of charge through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. References to our website addressed in this report are provided as a convenience and do not constitute, and should not be viewed as, an incorporation by reference of the information contained on, or available through, the website. Therefore, such information should not be considered part of this report.

Our Board of Directors has an audit committee, a compensation and personnel committee and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, can be obtained free of charge from our website, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States. In addition, we provide a number of building services and industrial services. In 2016, we had revenues of approximately $7.6 billion. Our services are provided to a broad range of commercial, industrial, utility and institutional customers through approximately 75 operating subsidiaries and joint venture entities. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in all types of non-residential and certain residential facilities and in providing various services relating to the operation, maintenance and management of facilities, including refineries and petrochemical plants.

During the third quarter of 2014, we ceased construction operations in the United Kingdom. The results of the construction operations of our United Kingdom segment for all periods are presented as discontinued operations.

We design, integrate, install, start-up, operate and maintain various electrical and mechanical systems, including:

• Electric power transmission and distribution systems;

• Premises electrical and lighting systems;

• Process instrumentation in the refining, chemical process, food process and mining industries;

• Low-voltage systems, such as fire alarm, security and process control systems;

• Voice and data communications systems;

• Roadway and transit lighting and fiber optic lines;

• Heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems;

• Fire protection systems;

• Plumbing, process and high-purity piping systems;

• Controls and filtration systems;

• Water and wastewater treatment systems;

• Central plant heating and cooling systems;

• Crane and rigging services;

• Millwright services; and

• Steel fabrication, erection, and welding services.

Our building services operations, which are provided to a wide range of facilities, including commercial, utility, institutional and governmental facilities, include:

• Commercial and government site-based operations and maintenance;

• Facility maintenance and services, including reception, security and catering services;

• Outage services to utilities and industrial plants;

• Military base operations support services;

• Mobile mechanical maintenance and services;

• Floor care and janitorial services;

• Landscaping, lot sweeping and snow removal;

• Facilities management;

• Vendor management;

• Call center services;

• Installation and support for building systems;

• Program development, management and maintenance for energy systems;

• Technical consulting and diagnostic services;

• Infrastructure and building projects for federal, state and local governmental agencies and bodies; and

• Small modification and retrofit projects.

Our industrial services are provided to refineries and petrochemical plants and include:

• On-site repairs, maintenance and service of heat exchangers, towers, vessels and piping;

• Design, manufacturing, repair and hydro blast cleaning of shell and tube heat exchangers and related equipment;

• Refinery turnaround planning and engineering services;

• Specialty welding services;

• Overhaul and maintenance of critical process units in refineries and petrochemical plants; and

• Specialty technical services for refineries and petrochemical plants.

We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, property managers and other subcontractors. Our industrial services are generally provided directly to refineries and petrochemical plants. Worldwide, as of December 31, 2016, we had approximately 31,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2016 revenues, approximately 96% were generated in the United States and approximately 4% were generated in foreign countries, substantially all in the United Kingdom. In 2016, approximately 34% of revenues were derived from new construction projects, 21% were derived from renovation and retrofit of customers’ existing facilities, 31% were derived from building services, and 14% were derived from industrial services.

The broad scope of our operations is more particularly described below. For information regarding the revenues, operating income and total assets of each of our segments with respect to each of the last three years, and our revenues and assets attributable to the United States and the United Kingdom for the last three years, see Note 17 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Operations

The electrical and mechanical construction services industry has grown over the years due principally to the increased content, complexity and sophistication of electrical and mechanical systems, as well as the installation of more technologically advanced voice and data communications, lighting, and environmental control systems in all types of facilities, in large part due to the integration of digital processing and information technology. For these reasons, buildings need extensive electrical distribution systems. In addition, advanced voice and data communication systems require sophisticated power supplies and extensive low-voltage and fiber-optic communications cabling. Moreover, the need for substantial environmental controls within a building, due to the heightened need for climate control to maintain extensive computer systems at optimal temperatures, and the demand for energy savings and environmental controls in individual spaces have over the years expanded opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Electrical and mechanical construction services primarily involve the design, integration, installation and start-up, and provision of services relating to: (a) electric power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems and related switch gear and controls; (b) premises electrical and lighting systems, including fixtures and controls; (c) process instrumentation in the refining, chemical process, food process and mining industries; (d) low-voltage systems, such as fire alarm, security and process control systems; (e) voice and data communications systems, including fiber-optic and low-voltage cabling; (f) roadway and transit lighting and fiber-optic lines; (g) heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; (h) fire protection systems; (i) plumbing, process and high-purity piping systems; (j) controls and filtration systems; (k) water and wastewater treatment systems; (l) central plant heating and cooling systems; (m) cranes and rigging; (n) millwrighting; and (o) steel fabrication, erection and welding.

Electrical and mechanical construction services generally fall into one of three categories: (a) large installation projects with contracts often in the multi-million dollar range that involve construction of manufacturing and commercial buildings and institutional and public works projects or the fit-out of large blocks of space within commercial buildings, (b) large and medium sized capital and maintenance projects for manufacturing, petrochemical, oil and industrial clients and (c) smaller installation projects typically involving fit-out, renovation and retrofit work.

Our United States electrical and mechanical construction services accounted for about 54% of our 2016 revenues, approximately 62% of which were related to new construction and approximately 38% of which were related to renovation and retrofit projects.

We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for institutional purposes (such as educational and correctional facilities and research laboratories); (b) for manufacturing purposes (such as pharmaceutical plants, steel, pulp and paper mills, chemical, food, automotive and semiconductor manufacturing facilities and power generation); (c) for transportation purposes (such as highways, bridges, airports and transit systems); (d) for commercial purposes (such as office buildings, data centers, convention centers, sports stadiums and shopping malls); (e) for hospitality purposes (such as resorts, hotels and casinos); (f) for water and wastewater purposes; (g) for healthcare purposes; (h) for process facilities such as oil and gas refineries and chemical processing plants; and (i) for oil and gas pipeline compressor stations and terminal and metering facilities. Our largest projects, which typically range in size from $10.0 million up to and occasionally exceeding $150.0 million and are frequently multi-year projects, represented approximately 29% of our worldwide construction services revenues in 2016.

Our projects of less than $10.0 million accounted for approximately 71% of our worldwide construction services revenues in 2016. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

We have a broad customer base with many long-standing relationships. We perform construction services pursuant to contracts with owners (such as corporations, municipalities and other governmental entities), general contractors, systems suppliers, construction managers, developers, other subcontractors and tenants of commercial properties. Institutional and public works projects are frequently long-term complex projects that require significant technical and management skills and the financial strength to obtain bid and performance bonds, which are often a condition to bidding for and winning these projects.

We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, in the United States, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States building services segment offers a broad range of services, including operation, maintenance and service of electrical and mechanical systems; commercial and government site-based operations and maintenance; facility maintenance and services, including outage services to utilities and manufacturing facilities; military base operations support services; mobile mechanical maintenance and services; floor care and janitorial services; landscaping, lot sweeping and snow removal; facilities management; vendor management; call center services; installation and support for building systems; program development, management and maintenance with respect to energy systems; technical consulting and diagnostic services; infrastructure and building projects for federal, state and local governmental agencies and bodies; and small modification and retrofit projects.

These building services, which generated approximately 31% of our 2016 revenues, are provided to owners, operators, tenants and managers of all types of facilities both on a contract basis for a specified period of time and on an individual task order basis. Of our 2016 building services revenues, approximately 89% were generated in the United States and approximately 11% were generated in the United Kingdom.

Our building services operations have built upon our traditional electrical and mechanical services operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a regional and national basis.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, voice and data and other systems, and the need for increased reliability, especially in electrical and mechanical systems. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include federal and state governments, utilities, independent power producers, and major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, publishing and other manufacturing, and large retailers and other businesses with geographically dispersed portfolios throughout the United States.

We currently provide building services in a majority of the states in the United States to commercial, industrial, institutional and governmental customers and as part of our operations are responsible for: (a) the oversight of all or most of the facilities operations of a business, including operation and maintenance; (b) servicing, upgrade and retrofit of HVAC, electrical, plumbing and industrial piping and sheet metal systems in existing facilities; (c) interior and exterior services, including floor care and janitorial services, landscaping, lot sweeping and snow removal; (d) diagnostic and solution engineering for building systems and their components; and (e) maintenance and support services to manufacturers and power producers.

In the Washington D.C. metropolitan area, we provide building services at a number of preeminent buildings, including those that house the Secret Service, The Federal Deposit Insurance Corporation, the National Foreign Affairs Training Center, and the Department of Health and Human Services, as well as other government facilities, including the NASA Jet Propulsion Laboratory in Pasadena, California. We also provide building services to a number of military bases, including base operations support services to the Navy National Capital Region and the Army’s Fort Huachuca, Arizona, and are involved in a joint venture providing building services to the Naval Support Activity Mid-South Base in Tennessee. The agreements pursuant to which this division provides services to the federal government are frequently for a base year and a number of option years exercisable at the sole discretion of the government, are often subject to renegotiation by the government in terms of scope of services, and are subject to termination by the government prior to the expiration of the applicable term.

Our United Kingdom subsidiary primarily focuses on building services and currently provides a broad range of services under multi-year agreements to public and private sector customers, including airlines, airports, real estate property managers, manufacturers and governmental agencies.

Our industrial services business, which generated approximately 14% of our 2016 revenues, is a recognized leader in the refinery turnaround market and has a growing presence in the petrochemical market. In July 2013, we acquired RepconStrickland, Inc., expanding services we provide to our refinery and petrochemical customers and significantly increasing the size of our industrial services business. Our industrial services business: (a) provides after-market maintenance, repair and cleaning services for highly engineered shell and tube heat exchangers for refineries and petrochemical plants both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services, and (b) designs and manufactures new highly engineered shell and tube heat exchangers. We also perform a broad range of turnaround and maintenance services for critical units of refineries so as to upgrade, repair and maintain them. Such services include turnaround and maintenance services relating to: (i) engineering and planning services in advance of complex refinery turnarounds; (ii) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers and related mechanical equipment) during refinery and petrochemical plant shut downs; (iii) replacement and new construction capital projects for refineries and petrochemical plants; and (iv) other related specialty technical services such as (a) welding (including pipe welding) and fabrication; heater, boiler, and reformer repairs and replacements; converter repair and revamps; and vessel, exchanger and tower services; (b) tower and column repairs in refineries and petrochemical facilities; (c) installation and repair of refractory materials for critical units in process plants so as to protect equipment from corrosion, erosion, and extreme temperatures; and (d) acid-proofing services to protect critical components at refineries from chemical exposure.

Competition

In our construction services, building services and industrial services businesses, we compete with national, regional and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

We believe that the electrical and mechanical construction services businesses are highly fragmented and our competition includes thousands of small companies across the United States. In the United States, there are a few public companies focused on providing either electrical and/or mechanical construction services, such as Integrated Electrical Services, Inc., Comfort Systems USA, Inc. and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability and financial strength. Because we have total assets, annual revenues, access to bank credit and surety bonding and expertise significantly greater than most of our competitors, we believe we have a significant competitive advantage over our competitors in providing electrical and mechanical construction services. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure; (e) relationships with customers; (f) geographic diversity; (g) the ability to control project costs; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital; (k) access to bank credit; and (l) price. However, there are relatively few significant barriers to entry to several types of our construction services business.

While the building services business is also highly fragmented, with most competitors operating in a specific geographic region, a number of large United States based corporations such as AECOM Technology Corporation, Johnson Controls, Inc., Fluor Corp., J&J Worldwide Services, Cushman & Wakefield Inc., CB Richard Ellis, Inc., Jones Lang LaSalle Incorporated, Sodexo, Inc., Aramark Corporation and ABM Industries Incorporated are engaged in this field, as are large original equipment manufacturers such as Carrier Corp. and Trane Inc. In addition, we compete with several regional firms serving all or portions of the markets we target, such as Brickman Valley Crest, Inc., Kellermeyer Bergensons Services, Inc., SMS Assist, LLC and Ferandino & Sons, Inc. Our principal services competitors in the United Kingdom include ISS UK Ltd. and MITIE Group plc. The key competitive factors in the building services business include price, service, quality, technical expertise, geographic scope and the availability of qualified personnel and managers. Due to our size, both financial and geographic, and our technical capability and management experience, we believe we are in a strong competitive position in the building services business. However, there are relatively few barriers to entry to most of our building services businesses.

In our industrial services business, we are a leading North American provider of after-market maintenance and repair services for, and manufacturing of, highly engineered shell and tube heat exchangers and related equipment and a leader in providing specialized services to refineries and petrochemical plants. The market for providing these services and products to refineries and petrochemical plants is highly fragmented and includes large national industrial services providers, as well as numerous regional companies, including JV Industrial Companies Ltd., Matrix Service Company, Starcon, Turner Industries, Team, Inc., Cust-O-Fab, Dunn Heat, and Wyatt Field Service Company. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufacturers. The key competitive factors in the industrial services market include service, quality, ability to respond quickly, technical expertise, price, safety record and availability of qualified personnel. Due to our technical capabilities, safety record and skilled workforce, we believe that we are in a strong competitive position in the industrial services market we serve. Because of the complex tasks associated with turnarounds and the precision required in the manufacture of heat exchangers, we believe that the barriers to entry in this business are significant.

Employees

At December 31, 2016, we employed approximately 31,000 people, approximately 55% of whom are represented by various unions pursuant to approximately 400 collective bargaining agreements between our individual subsidiaries and local unions. We believe that our employee relations are generally good. Only two of these collective bargaining agreements are national or regional in scope.

Backlog

Our backlog at December 31, 2016 was $3.90 billion compared to $3.77 billion of backlog at December 31, 2015. Backlog increases with awards of new contracts and decreases as we perform work on existing contracts. Backlog is not a term recognized under United States generally accepted accounting principles; however, it is a common measurement used in our industry. We include a project within our backlog at such time as a contract is awarded and agreement on contract terms has been reached. Backlog includes unrecognized revenues to be realized from uncompleted construction contracts plus unrecognized revenues expected to be realized over the remaining term of services contracts. However, we do not include in backlog contracts for which we are paid on a time and material basis and a fixed amount cannot be determined, and if the remaining term of a services contract exceeds 12 months, the unrecognized revenues attributable to such contract included in backlog are limited to only the next 12

months of revenues provided for in the contract award. Our backlog also includes amounts related to services contracts for which a fixed price contract value is not assigned when a reasonable estimate of total revenues can be made from budgeted amounts agreed to with our customers. Our backlog is comprised of: (a) original contract amounts, (b) change orders for which we have received written confirmations from our customers, (c) pending change orders for which we expect to receive confirmations in the ordinary course of business and (d) claim amounts that we have made against customers for which we have determined we have a legal basis under existing contractual arrangements and as to which we consider recovery to be probable. Such claim amounts were immaterial for all periods presented. Our backlog does not include anticipated revenues from unconsolidated joint ventures or variable interest entities and anticipated revenues from pass-through costs on contracts for which we are acting in the capacity of an agent and which are reported on the net basis. We believe our backlog is firm, although many contracts are subject to cancellation at the election of our customers. Historically, cancellations have not had a material adverse effect on us. We estimate that 84% of our backlog as of December 31, 2016 will be recognized as revenues during 2017.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC’s website at http://www.sec.gov. You may also read and copy any document we file at the SEC’s Public Reference Room located at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the Public Reference Room.

Our Internet address is www.emcorgroup.com. We make available free of charge through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. References to our website addressed in this report are provided as a convenience and do not constitute, and should not be viewed as, an incorporation by reference of the information contained on, or available through, the website. Therefore, such information should not be considered part of this report.

Our Board of Directors has an audit committee, a compensation and personnel committee and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, can be obtained free of charge from our website, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States. In addition, we provide a number of building services and industrial services. In 2015, we had revenues of approximately $6.7 billion. Our services are provided to a broad range of commercial, industrial, utility and institutional customers through approximately 70 operating subsidiaries and joint venture entities. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in all types of non-residential and certain residential facilities and in providing various services relating to the operation, maintenance and management of facilities, including refineries and petrochemical plants.

Due to a historical pattern of losses in the construction operations of our United Kingdom segment and our negative assessment of construction market conditions in the United Kingdom for the foreseeable future, we announced during the quarter ended June 30, 2013 our decision to withdraw from the construction market in the United Kingdom. During the third quarter of 2014, we ceased construction operations in the United Kingdom. The results of the construction operations of our United Kingdom segment for all periods are presented as discontinued operations.

We design, integrate, install, start-up, operate and maintain various electrical and mechanical systems, including:

• Electric power transmission and distribution systems;

• Premises electrical and lighting systems;

• Low-voltage systems, such as fire alarm, security and process control systems;

• Voice and data communications systems;

• Roadway and transit lighting and fiber optic lines;

• Heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems;

• Fire protection systems;

• Plumbing, process and high-purity piping systems;

• Controls and filtration systems;

• Water and wastewater treatment systems;

• Central plant heating and cooling systems;

• Crane and rigging services;

• Millwright services; and

• Steel fabrication, erection, and welding services.

Our building services operations, which are provided to a wide range of facilities, including commercial, utility, institutional and governmental facilities, include:

• Commercial and government site-based operations and maintenance;

• Facility maintenance and services, including reception, security and catering services;

• Outage services to utilities and industrial plants;

• Military base operations support services;

• Mobile mechanical maintenance and services;

• Floor care and janitorial services;

• Landscaping, lot sweeping and snow removal;

• Facilities management;

• Vendor management;

• Call center services;

• Installation and support for building systems;

• Program development, management and maintenance for energy systems;

• Technical consulting and diagnostic services;

• Infrastructure and building projects for federal, state and local governmental agencies and bodies; and

• Small modification and retrofit projects.

Our industrial services are provided to refineries and petrochemical plants and include:

• On-site repairs, maintenance and service of heat exchangers, towers, vessels and piping;

• Design, manufacturing, repair and hydro blast cleaning of shell and tube heat exchangers and related equipment;

• Refinery turnaround planning and engineering services;

• Specialty welding services;

• Overhaul and maintenance of critical process units in refineries and petrochemical plants; and

• Specialty technical services for refineries and petrochemical plants.

We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, property managers and other subcontractors. Our industrial services generally are provided directly to refineries and petrochemical plants. Worldwide, as of December 31, 2015, we had approximately 29,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2015 revenues, approximately 94% were generated in the United States and approximately 6% were generated in foreign countries, substantially all in the United Kingdom. In 2015, approximately 33% of revenues were derived from new construction projects, 18% were derived from renovation and retrofit of customer’s existing facilities, 35% were derived from our building services operations, and 14% were derived from our industrial services operations.

The broad scope of our operations is more particularly described below. For information regarding the revenues, operating income and total assets of each of our segments with respect to each of the last three years, and our revenues and assets attributable to the United States and the United Kingdom for the last three years, see Note 17 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Operations

The electrical and mechanical construction services industry has grown over the years due principally to the increased content, complexity and sophistication of electrical and mechanical systems, as well as the installation of more technologically advanced voice and data communications, lighting, and environmental control systems in all types of facilities in large part due to the integration of digital processing and information technology. For these reasons, buildings need extensive electrical distribution systems. In addition, advanced voice and data communication systems require sophisticated power supplies and extensive low-voltage and fiber-optic communications cabling. Moreover, the need for substantial environmental controls within a building, due to the heightened need for climate control to maintain extensive computer systems at optimal temperatures, and the demand for energy savings and environmental controls in individual spaces have over the years expanded opportunities for our electrical and

mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Electrical and mechanical construction services primarily involve the design, integration, installation and start-up, and provision of services relating to: (a) electric power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems and related switch gear and controls; (b) premises electrical and lighting systems, including fixtures and controls; (c) low-voltage systems, such as fire alarm, security and process control systems; (d) voice and data communications systems, including fiber-optic and low-voltage cabling; (e) roadway and transit lighting and fiber-optic lines; (f) heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; (g) fire protection systems; (h) plumbing, process and high-purity piping systems; (i) controls and filtration systems; (j) water and wastewater treatment systems; (k) central plant heating and cooling systems; (l) cranes and rigging; (m) millwrighting; and (n) steel fabrication, erection and welding.

Electrical and mechanical construction services generally fall into one of two categories: (a) large installation projects with contracts often in the multi-million dollar range that involve construction of manufacturing and commercial buildings and institutional and public works projects or the fit-out of large blocks of space within commercial buildings and (b) smaller installation projects typically involving fit-out, renovation and retrofit work.

Our United States electrical and mechanical construction services operations accounted for about 51% of our 2015 revenues, approximately 65% of which were related to new construction and approximately 35% of which were related to renovation and retrofit projects. Due to a historical pattern of losses in the construction operations of our United Kingdom segment and our negative assessment of construction market conditions in the United Kingdom for the foreseeable future, we announced during the quarter ended June 30, 2013 our decision to withdraw from the construction market in the United Kingdom. During the third quarter of 2014, we ceased construction operations in the United Kingdom. The results of the construction operations of our United Kingdom segment for all periods are presented as discontinued operations. Accordingly, we focus in the United Kingdom principally on building services.

We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for institutional purposes (such as educational and correctional facilities and research laboratories); (b) for manufacturing purposes (such as pharmaceutical plants, steel, pulp and paper mills, chemical, food, automotive and semiconductor manufacturing facilities and power generation); (c) for transportation purposes (such as highways, bridges, airports and transit systems); (d) for commercial purposes (such as office buildings, data centers, convention centers, sports stadiums and shopping malls); (e) for hospitality purposes (such as resorts, hotels and casinos); (f) for water and wastewater purposes; and (g) for healthcare purposes. Our largest projects, which typically range in size from $10.0 million up to and occasionally exceeding $150.0 million and are frequently multi-year projects, represented approximately 27% of our worldwide construction services revenues in 2015.

Our projects of less than $10.0 million accounted for approximately 73% of our worldwide construction services revenues in 2015. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

We have a broad customer base with many long-standing relationships. We perform construction services pursuant to contracts with owners, such as corporations, municipalities and other governmental entities, general contractors, systems suppliers, construction managers, developers, other subcontractors and tenants of commercial properties. Institutional and public works projects are frequently long-term complex projects that require significant technical and management skills and the financial strength to obtain bid and performance bonds, which are often a condition to bidding for and winning these projects.

We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, in the United States, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States building services segment offers a broad range of services, including operation, maintenance and service of electrical and mechanical systems; commercial and government site-based operations and maintenance; facility maintenance and

services, including outage services to utilities and manufacturing facilities; military base operations support services; mobile mechanical maintenance and services; floor care and janitorial services; landscaping, lot sweeping and snow removal; facilities management; vendor management; call center services; installation and support for building systems; program development, management and maintenance with respect to energy systems; technical consulting and diagnostic services; infrastructure and building projects for federal, state and local governmental agencies and bodies; and small modification and retrofit projects.

These building services, which generated approximately 35% of our 2015 revenues, are provided to owners, operators, tenants and managers of all types of facilities both on a contract basis for a specified period of time and on an individual task order basis. Of our 2015 building services revenues, approximately 87% were generated in the United States and approximately 13% were generated in the United Kingdom.

Our building services operations have built upon our traditional electrical and mechanical services operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a regional and national basis.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, voice and data and other systems, and the need for increased reliability, especially in electrical and mechanical systems. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include federal and state governments, utilities, independent power producers, pulp and paper producers, and major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, publishing and other manufacturing, and large retailers and other businesses with geographically dispersed portfolios throughout the United States.

We currently provide building services in a majority of the states in the United States to commercial, industrial, institutional and governmental customers and as part of our operations are responsible for: (a) the oversight of all or most of the facilities operations of a business, including operation and maintenance; (b) servicing, upgrade and retrofit of HVAC, electrical, plumbing and industrial piping and sheet metal systems in existing facilities; (c) interior and exterior services, including floor care and janitorial services, landscaping, lot sweeping and snow removal; (d) diagnostic and solution engineering for building systems and their components; and (e) maintenance and support services to manufacturers and power producers.

In the Washington D.C. metropolitan area, we provide building services at a number of preeminent buildings, including those that house the Secret Service, The Federal Deposit Insurance Corporation, the National Foreign Affairs Training Center, and the Department of Health and Human Services, as well as other government facilities including the NASA Jet Propulsion Laboratory in Pasadena, California. We also provide building services to a number of military bases, including base operations support services to the Navy National Capital Region and the Army’s Fort Huachuca, Arizona, and are also involved in a joint venture providing building services to the Naval Support Activity Mid-South Base in Tennessee. The agreements pursuant to which this division provides services to the federal government are frequently for a base year and a number of option years exercisable at the sole discretion of the government, are often subject to renegotiation by the government in terms of scope of services, and are subject to termination by the government prior to the expiration of the applicable term.

Our United Kingdom subsidiary primarily focuses on building services and currently provides a broad range of services under multi-year agreements to public and private sector customers, including airlines, airports, real estate property managers, manufacturers and governmental agencies.

Our industrial services business is a recognized leader in the refinery turnaround market and has a growing presence in the petrochemical market. In July 2013, we acquired RepconStrickland, Inc. expanding services we provide to our refinery and petrochemical customers and significantly increasing the size of our industrial services business. Our industrial services business: (a) provides after-market maintenance, repair and cleaning services for highly engineered shell and tube heat exchangers for refineries and petrochemical plants both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services, and (b) designs and manufactures new highly engineered shell and tube heat exchangers. We also perform a broad range of turnaround and maintenance services for critical units of refineries so as to upgrade, repair and maintain them. Such services include turnaround and maintenance services relating to: (i) engineering and planning services in advance of complex refinery turnarounds, (ii) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers and related mechanical equipment) during refinery and petrochemical plant shut downs, (iii) replacement and new construction capital projects for refineries and petrochemical plants, and (iv) other related specialty technical services such as (a) welding, including pipe welding, and fabrication; heater, boiler, and reformer repairs and replacements; converter repair and revamps; and vessel, exchanger and tower services; (b) tower and column repairs in refineries and petrochemical facilities; (c) installation and repair of refractory materials for critical units in process plants so as to protect

equipment from corrosion, erosion, and extreme temperatures; and (d) acid-proofing services to protect critical components at refineries from chemical exposure.

Competition

In our construction services, building services and industrial services businesses, we compete with national, regional and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

We believe that the electrical and mechanical construction services businesses are highly fragmented and our competition includes thousands of small companies across the United States. In the United States, there are a few public companies focused on providing either electrical and/or mechanical construction services, such as Integrated Electrical Services, Inc., Comfort Systems USA, Inc. and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability and financial strength. Because we have total assets, annual revenues, access to bank credit and surety bonding and expertise significantly greater than most of our competitors, we believe we have a significant competitive advantage over our competitors in providing electrical and mechanical construction services. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure; (e) relationships with customers; (f) geographic diversity; (g) the ability to control project costs; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital; (k) access to bank credit; and (l) price. However, there are relatively few significant barriers to entry to several types of our construction services business.

While the building services business is also highly fragmented with most competitors operating in a specific geographic region, a number of large United States based corporations such as AECOM Technology Corporation, Johnson Controls, Inc., Fluor Corp., J&J Worldwide Services, Cushman & Wakefield Inc., CB Richard Ellis, Inc., Jones Lang LaSalle Incorporated, Sodexo, Inc., Aramark Corporation and ABM Industries Incorporated are engaged in this field, as are large original equipment manufacturers such as Carrier Corp. and Trane Inc. In addition, we compete with several regional firms serving all or portions of the markets we target, such as Brickman Valley Crest, Inc., Kellermeyer Bergensons Services, Inc., SMS Assist, LLC and Ferandino & Sons, Inc. Our principal services competitors in the United Kingdom include ISS UK Ltd. and MITIE Group plc. The key competitive factors in the building services business include price, service, quality, technical expertise, geographic scope and the availability of qualified personnel and managers. Due to our size, both financial and geographic, and our technical capability and management experience, we believe we are in a strong competitive position in the building services business. However, there are relatively few barriers to entry to most of our building services businesses.

In our industrial services business, we are a leading North American provider of after-market maintenance and repair services for, and manufacturing of, highly engineered shell and tube heat exchangers and related equipment and a leader in providing specialized services to refineries and petrochemical plants. The market for providing these services and products to refineries and petrochemical plants is highly fragmented and includes large national industrial services providers, as well as numerous regional companies, including JV Industrial Companies Ltd., Matrix Service Company, Starcon, Turner Industries, Team, Inc., Cust-O-Fab, Dunn Heat, and Wyatt Field Service Company. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufacturers. The key competitive factors in the industrial services market include service, quality, ability to respond quickly, technical expertise, price, safety record and availability of qualified personnel. Due to our technical capabilities, safety record and skilled workforce, we believe that we are in a strong competitive position in the industrial services market we serve. Because of the complex tasks associated with turnarounds and the precision required in the manufacture of heat exchangers, we believe that the barriers to entry in this business are significant.

Employees

At December 31, 2015, we employed approximately 29,000 people, approximately 56% of whom are represented by various unions pursuant to more than 375 collective bargaining agreements between our individual subsidiaries and local unions. We believe that our employee relations are generally good. Only two of these collective bargaining agreements are national or regional in scope.

Backlog

Our backlog at December 31, 2015 was $3.77 billion compared to $3.63 billion of backlog at December 31, 2014. Backlog increases with awards of new contracts and decreases as we perform work on existing contracts. Backlog is not a term recognized under United States generally accepted accounting principles; however, it is a common measurement used in our industry. We include a project within our backlog at such time as a contract is awarded and agreement on contract terms has been reached. Backlog includes unrecognized revenues to be realized from uncompleted construction contracts plus unrecognized revenues expected to be realized over the remaining term of services contracts. However, we do not include in backlog contracts for which

we are paid on a time and material basis and a fixed amount cannot be determined, and if the remaining term of a services contract exceeds 12 months, the unrecognized revenues attributable to such contract included in backlog are limited to only the next 12 months of revenues provided for in the contract award. Our backlog also includes amounts related to services contracts for which a fixed price contract value is not assigned when a reasonable estimate of total revenues can be made from budgeted amounts agreed to with our customer. Our backlog is comprised of: (a) original contract amounts, (b) change orders for which we have received written confirmations from our customers, (c) pending change orders for which we expect to receive confirmations in the ordinary course of business and (d) claim amounts that we have made against customers for which we have determined we have a legal basis under existing contractual arrangements and as to which we consider recovery to be probable. Such claim amounts were immaterial for all periods presented. Our backlog does not include anticipated revenues from unconsolidated joint ventures or variable interest entities and anticipated revenues from pass-through costs on contracts for which we are acting in the capacity of an agent and which are reported on the net basis. We believe our backlog is firm, although many contracts are subject to cancellation at the election of our customers. Historically, cancellations have not had a material adverse effect on us. We estimate that 79% of our backlog as of December 31, 2015 will be recognized as revenues during 2016.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC’s website at http://www.sec.gov. You may also read and copy any document we file at the SEC’s Public Reference Room located at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the Public Reference Room.

Our Internet address is www.emcorgroup.com. We make available free of charge through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. References to our website addressed in this report are provided as a convenience and do not constitute, and should not be viewed as, an incorporation by reference of the information contained on, or available through, the website. Therefore, such information should not be considered part of this report.

Our Board of Directors has an audit committee, a compensation and personnel committee and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, can be obtained free of charge from our website, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States. In addition, we provide a number of building services and industrial services. In 2014, we had revenues of approximately $6.4 billion. Our services are provided to a broad range of commercial, industrial, utility and institutional customers through approximately 70 operating subsidiaries and joint venture entities. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in all types of non-residential and certain residential facilities and in providing various services relating to the operation, maintenance and management of facilities, including refineries and petrochemical plants.

During the third quarter of 2013, we completed the acquisition of RepconStrickland, Inc. (“RSI”), a leading provider of turnaround and specialty services to the North American refinery and petrochemical markets, and its results are included in our United States industrial services segment.

Due to recurring losses over the last several years in the construction operations of our United Kingdom segment and our negative assessment of construction market conditions in the United Kingdom for the foreseeable future, we announced during the quarter ended June 30, 2013 our decision to withdraw from the construction market in the United Kingdom. During the third quarter of 2014, we ceased construction operations in the United Kingdom. The results of the construction operations of our United Kingdom segment for all periods are presented as discontinued operations. The segment formally named the United Kingdom construction and building services segment has been renamed the United Kingdom building services segment. In addition, the results of operations for all periods presented reflect discontinued operations accounting due to the disposition in August 2011 of our Canadian subsidiary.

We design, integrate, install, start-up, operate and maintain various electrical and mechanical systems, including:

• Electric power transmission and distribution systems;

• Premises electrical and lighting systems;

• Low-voltage systems, such as fire alarm, security and process control systems;

• Voice and data communications systems;

• Roadway and transit lighting and fiber optic lines;

• Heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems;

• Fire protection systems;

• Plumbing, process and high-purity piping systems;

• Controls and filtration systems;

• Water and wastewater treatment systems;

• Central plant heating and cooling systems;

• Crane and rigging services;

• Millwright services; and

• Steel fabrication, erection, and welding services.

Our building services operations, which are provided to a wide range of facilities, including commercial, utility, institutional and governmental facilities, include:

• Commercial and government site-based operations and maintenance;

• Facility maintenance and services, including reception, security and catering services;

• Outage services to utilities and industrial plants;

• Military base operations support services;

• Mobile mechanical maintenance and services;

• Floor care and janitorial services;

• Landscaping, lot sweeping and snow removal;

• Facilities management;

• Vendor management;

• Call center services;

• Installation and support for building systems;

• Program development, management and maintenance for energy systems;

• Technical consulting and diagnostic services;

• Infrastructure and building projects for federal, state and local governmental agencies and bodies; and

• Small modification and retrofit projects.

Our industrial services are provided to refineries and petrochemical plants and include:

• On-site repairs, maintenance and service of heat exchangers, towers, vessels and piping;

• Design, manufacturing, repair and hydro blast cleaning of shell and tube heat exchangers and related equipment;

• Refinery turnaround planning and engineering services;

• Specialty welding services;

• Overhaul and maintenance of critical process units in refineries and petrochemical plants; and

• Specialty technical services for refineries and petrochemical plants.

We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, property managers and other subcontractors. Our industrial services generally are provided directly to refineries and petrochemical plants. Worldwide, as of December 31, 2014, we had approximately 27,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2014 revenues, approximately 95% were generated in the United States and approximately 5% were generated in foreign countries, substantially all in the United Kingdom. In 2014, approximately 33% of revenues were derived from new construction projects, 19% were derived from renovation and retrofit of customer’s existing facilities, 35% were derived from our building services operations, and 13% were derived from our industrial services operations.

The broad scope of our operations is more particularly described below. For information regarding the revenues, operating income and total assets of each of our segments with respect to each of the last three years, and our revenues and assets attributable to the United States and the United Kingdom for the last three years, see Note 17 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Operations

The electrical and mechanical construction services industry has grown over the years due principally to the increased content, complexity and sophistication of electrical and mechanical systems, as well as the installation of more technologically advanced voice and data communications, lighting, and environmental control systems in all types of facilities in large part due to the integration of digital processing and information technology. For these reasons, buildings need extensive electrical distribution systems. In addition, advanced voice and data communication systems require sophisticated power supplies and extensive low-voltage and fiber-optic communications cabling. Moreover, the need for substantial environmental controls within a building, due to the heightened need for climate control to maintain extensive computer systems at optimal temperatures, and the demand for energy savings and environmental controls in individual spaces have over the years expanded opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Electrical and mechanical construction services primarily involve the design, integration, installation and start-up, and provision of services relating to: (a) electric power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems and related switch gear and controls; (b) premises electrical and lighting systems, including fixtures and controls; (c) low-voltage systems, such as fire alarm, security and process control systems; (d) voice and data communications systems, including fiber-optic and low-voltage cabling; (e) roadway and transit lighting and fiber-optic lines; (f) heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; (g) fire protection systems; (h) plumbing, process and high-purity piping systems; (i) controls and filtration systems; (j) water and wastewater treatment systems; (k) central plant heating and cooling systems; (l) cranes and rigging; (m) millwrighting; and (n) steel fabrication, erection and welding.

Electrical and mechanical construction services generally fall into one of two categories: (a) large installation projects with contracts often in the multi-million dollar range that involve construction of manufacturing and commercial buildings and institutional and public works projects or the fit-out of large blocks of space within commercial buildings and (b) smaller installation projects typically involving fit-out, renovation and retrofit work.

Our United States electrical and mechanical construction services operations accounted for about 50% of our 2014 revenues, approximately 64% of which were related to new construction and approximately 36% of which were related to renovation and retrofit projects. Due to recurring losses over the last several years in the construction operations of our United Kingdom segment and our negative assessment of construction market conditions in the United Kingdom for the foreseeable future, we announced during the quarter ended June 30, 2013 our decision to withdraw from the construction market in the United Kingdom. During the third quarter of 2014, we ceased construction operations in the United Kingdom. The results of the construction operations of our United Kingdom segment for all periods are presented as discontinued operations. We plan to focus in the United Kingdom solely on building services.

We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for institutional purposes (such as educational and correctional facilities and research laboratories); (b) for manufacturing purposes (such as pharmaceutical plants, steel, pulp and paper mills, chemical, food, automotive and semiconductor manufacturing facilities and power generation); (c) for transportation purposes (such as highways, airports and transit systems); (d) for commercial purposes (such as office buildings, data centers, convention centers, sports stadiums and shopping malls); (e) for hospitality purposes (such as resorts, hotels and casinos); (f) for water and wastewater purposes; and (g) for healthcare purposes. Our largest projects, which typically range in size from $10.0 million up to and occasionally exceeding $150.0 million and are frequently multi-year projects, represented approximately 27% of our worldwide construction services revenues in 2014.

Our projects of less than $10.0 million accounted for approximately 73% of our worldwide construction services revenues in 2014. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

We have a broad customer base with many long-standing relationships. We perform construction services pursuant to contracts with owners, such as corporations, municipalities and other governmental entities, general contractors, systems suppliers, construction managers, developers, other subcontractors and tenants of commercial properties. Institutional and public works

projects are frequently long-term complex projects that require significant technical and management skills and the financial strength to obtain bid and performance bonds, which are often a condition to bidding for and winning these projects.

We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, in the United States, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States building services segment offers a broad range of services, including operation, maintenance and service of electrical and mechanical systems; commercial and government site-based operations and maintenance; facility maintenance and services, including outage services to utilities and manufacturing facilities; military base operations support services; mobile mechanical maintenance and services; floor care and janitorial services; landscaping, lot sweeping and snow removal; facilities management; vendor management; call center services; installation and support for building systems; program development, management and maintenance with respect to energy systems; technical consulting and diagnostic services; infrastructure and building projects for federal, state and local governmental agencies and bodies; and small modification and retrofit projects.

These building services, which generated approximately 35% of our 2014 revenues, are provided to owners, operators, tenants and managers of all types of facilities both on a contract basis for a specified period of time and on an individual task order basis. Of our 2014 building services revenues, approximately 88% were generated in the United States and approximately 12% were generated in the United Kingdom.

Our building services operations have built upon our traditional electrical and mechanical services operations, facilities services activities of our electrical and mechanical contracting subsidiaries, and our client relationships, as well as acquisitions, to expand the scope of services being offered and to develop packages of services for customers on a regional and national basis.

Demand for our building services is often driven by customers’ decisions to focus on their core competencies, customers’ programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, voice and data and other systems, and the need for increased reliability, especially in electrical and mechanical systems. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our building services business include federal and state governments, utilities, independent power producers, pulp and paper producers, and major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, publishing and other manufacturing, and large retailers and other businesses with multiple locations throughout the United States.

We currently provide building services in a majority of the states in the United States to commercial, industrial, institutional and governmental customers and as part of our operations are responsible for: (a) the oversight of all or most of the facilities operations of a business, including operation and maintenance; (b) servicing, upgrade and retrofit of HVAC, electrical, plumbing and industrial piping and sheet metal systems in existing facilities; (c) interior and exterior services, including floor care and janitorial services, landscaping, lot sweeping and snow removal; (d) diagnostic and solution engineering for building systems and their components; and (e) maintenance and support services to manufacturers and power producers.

In the Washington D.C. metropolitan area, we provide building services at a number of preeminent buildings, including those that house the Secret Service, The Federal Deposit Insurance Corporation, the National Foreign Affairs Training Center, and the Department of Health and Human Services, as well as other government facilities including the NASA Jet Propulsion Laboratory in Pasadena, California. We also provide building services to a number of military bases, including base operations support services to the Navy National Capital Region and the Army’s Fort Huachuca, Arizona, and are also involved in a joint venture providing building services to the Naval Support Activity Mid-South Base in Tennessee. The agreements pursuant to which this division provides services to the federal government are frequently for a term of five years, are subject to renegotiation of terms and prices by the government, and are subject to termination by the government prior to the expiration of the term.

Our United Kingdom subsidiary primarily focuses on building services and currently provides a broad range of services under multi-year agreements to public and private sector customers, including airlines, airports, real estate property managers, manufacturers and governmental agencies.

Our industrial services business is a recognized leader in the refinery turnaround market and has a growing presence in the petrochemical market. In July 2013, we acquired RepconStrickland, Inc. expanding services we provide to our refinery and petrochemical customers and significantly increasing the size of our industrial services business. Our industrial services business: (a) provides after-market maintenance, repair and cleaning services for highly engineered shell and tube heat exchangers for refineries and petrochemical plants both in the field and at our own shops, including tube and shell repairs, bundle repairs, and extraction services, and (b) designs and manufactures new highly engineered shell and tube heat exchangers. We also perform a

broad range of turnaround and maintenance services for critical units of refineries so as to upgrade, repair and maintain them. Such services include turnaround and maintenance services relating to: (i) engineering and planning services in advance of complex refinery turnarounds, (ii) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers and related mechanical equipment) during refinery and petrochemical plant shut downs, (iii) general revamps and capital projects for refineries and petrochemical plants, and (iv) other related specialty technical services such as (a) welding, including pipe welding, and fabrication; heater, boiler, and reformer repairs and revamps; converter repair and revamps; and vessel, exchanger and tower services; (b) tower and column repairs and revamps in refineries; (c) installation and repair of refractory materials for critical units in process plants so as to protect equipment from corrosion, erosion, and extreme temperatures; and (d) acid-proofing services to protect critical components at refineries from chemical exposure.

Competition

In our construction services, building services and industrial services businesses, we compete with national, regional and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area, as well as with certain foreign companies.

We believe that the electrical and mechanical construction services businesses are highly fragmented and our competition includes thousands of small companies across the United States. In the United States, there are a few public companies focused on providing either electrical and/or mechanical construction services, such as Integrated Electrical Services, Inc., Comfort Systems USA, Inc. and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability and financial strength. Because we have total assets, annual revenues, access to bank credit and surety bonding and expertise significantly greater than most of our competitors, we believe we have a significant competitive advantage over our competitors in providing electrical and mechanical construction services. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure; (e) relationships with customers; (f) geographic diversity; (g) the ability to control project costs; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital; (k) access to bank credit; and (l) price. However, there are relatively few significant barriers to entry to several types of our construction services business.

While the building services business is also highly fragmented with most competitors operating in a specific geographic region, a number of large United States based corporations such as AECOM Technology Corporation, Johnson Controls, Inc., Fluor Corp., J&J Worldwide Services, DTZ, CB Richard Ellis, Inc., Jones Lang LaSalle and ABM Facility Services are engaged in this field, as are large original equipment manufacturers such as Carrier Corp. and Trane Air Conditioning. In addition, we compete with several regional firms serving all or portions of the markets we target, such as Brickman Valley Crest, Inc., Kellermeyer Bergensons Services, Inc., SMS Assist, LLC and Ferandino & Sons, Inc. Our principal services competitors in the United Kingdom include ISS UK Ltd. and MITIE Group plc. The key competitive factors in the building services business include price, service, quality, technical expertise, geographic scope and the availability of qualified personnel and managers. Due to our size, both financial and geographic, and our technical capability and management experience, we believe we are in a strong competitive position in the building services business. However, there are relatively few barriers to entry to most of our building services businesses.

In our industrial services business, we are the leading North American provider of after-market maintenance and repair services for, and manufacturing of, highly engineered shell and tube heat exchangers and related equipment and a leader in providing specialized services to refineries and petrochemical plants. The market for providing these services and products to refineries and petrochemical plants is highly fragmented and includes large national industrial services providers, as well as numerous regional companies, including JV Industrial Companies Ltd., Matrix Service Company, Starcon, Turner Industries, Team, Inc., Cust-O-Fab, Dunn Heat, and Wyatt Field Service Company. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufacturers. The key competitive factors in the industrial services market include service, quality, ability to respond quickly, technical expertise, price, safety record and availability of qualified personnel. Due to our technical capabilities, safety record and skilled workforce, we believe that we are in a strong competitive position in the industrial services market we serve. Because of the complex tasks associated with turnarounds and precision required in the manufacture of heat exchangers, we believe that the barriers to entry in this business are significant.

Employees

At December 31, 2014, we employed approximately 27,000 people, approximately 55% of whom are represented by various unions pursuant to more than 375 collective bargaining agreements between our individual subsidiaries and local unions. We believe that our employee relations are generally good. Only two of these collective bargaining agreements are national or regional in scope.

Backlog

Our backlog at December 31, 2014 was $3.63 billion compared to $3.34 billion of backlog at December 31, 2013. Backlog increases with awards of new contracts and decreases as we perform work on existing contracts. Backlog is not a term recognized under United States generally accepted accounting principles; however, it is a common measurement used in our industry. We include a project within our backlog at such time as a contract is awarded. Backlog includes unrecognized revenues to be realized from uncompleted construction contracts plus unrecognized revenues expected to be realized over the remaining term of services contracts. However, we do not include in backlog contracts for which we are paid on a time and material basis and a fixed amount cannot be determined, and if the remaining term of a services contract exceeds 12 months, the unrecognized revenues attributable to such contract included in backlog are limited to only the next 12 months of revenues provided for in the contract award. Our backlog also includes amounts related to services contracts for which a fixed price contract value is not assigned when a reasonable estimate of total revenues can be made from budgeted amounts agreed to with our customer. Our backlog is comprised of: (a) original contract amounts, (b) change orders for which we have received written confirmations from our customers, (c) pending change orders for which we expect to receive confirmations in the ordinary course of business and (d) claim amounts that we have made against customers for which we have determined we have a legal basis under existing contractual arrangements and as to which we consider recovery to be probable. Such claim amounts were immaterial for all periods presented. Our backlog does not include anticipated revenues from unconsolidated joint ventures or variable interest entities and anticipated revenues from pass-through costs on contracts for which we are acting in the capacity of an agent and which are reported on the net basis. We believe our backlog is firm, although many contracts are subject to cancellation at the election of our customers. Historically, cancellations have not had a material adverse effect on us. We estimate that 82% of our backlog as of December 31, 2014 will be recognized as revenues during 2015.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC’s web site at http://www.sec.gov. You may also read and copy any document we file at the SEC’s Public Reference Room located at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the Public Reference Room.

Our Internet address is www.emcorgroup.com. We make available free of charge through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC.

Our Board of Directors has an audit committee, a compensation and personnel committee, a nominating and corporate governance committee, and a risk oversight committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, can be obtained free of charge from our web site, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States. In addition, we provide a number of building services and industrial services. In 2013, we had revenues of approximately $6.4 billion. Our services are provided to a broad range of commercial, industrial, utility and institutional customers through approximately 70 operating subsidiaries and joint venture entities. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in all types of non-residential facilities and in providing various services relating to the operation, maintenance and management of facilities, including refineries and petrochemical plants.

During the third quarter of 2013, we completed the acquisition of RepconStrickland, Inc. ("RSI"), a leading provider of turnaround and specialty services to the North American refinery and petrochemical markets. In connection with the acquisition of RSI and to reflect changes in our internal reporting structure and the information used by management to make operating decisions and assess performance, we created a new segment that includes RSI and certain businesses that had been part of our United States facilities services segment. The new segment is called the United States industrial services segment and the segment formerly named the United States facilities services segment has been renamed the United States building services segment.

Our reportable segments have been restated in all periods presented to reflect the changes in our segments referred to above. The segment formally named the United Kingdom construction and facilities services segment has been renamed the United Kingdom construction and building services segment. In addition, the results of operations for all periods presented reflect: (a) discontinued operations accounting due to the disposition in August 2011 of our Canadian subsidiary and (b) certain reclassifications of prior period amounts from our United States building services segment to our United States mechanical construction and facilities services segment due to changes in our internal reporting structure.

We design, integrate, install, start-up, operate and maintain various electrical and mechanical systems, including:

• Electric power transmission and distribution systems;

• Premises electrical and lighting systems;

• Low-voltage systems, such as fire alarm, security and process control systems;

• Voice and data communications systems;

• Roadway and transit lighting and fiber optic lines;

• Heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems;

• Fire protection systems;

• Plumbing, process and high-purity piping systems;

• Controls and filtration systems;

• Water and wastewater treatment systems;

• Central plant heating and cooling systems;

• Crane and rigging services;

• Millwright services; and

• Steel fabrication, erection, and welding services.

Our building services operations, which are provided to a wide range of facilities, including commercial, utility, institutional and governmental facilities, include:

• Commercial and government site-based operations and maintenance;

• Facility maintenance and services;

• Outage services to utilities and industrial plants;

• Military base operations support services;

• Mobile mechanical maintenance and services;

• Floor care and janitorial services;

• Landscaping, lot sweeping and snow removal;

• Facilities management;

• Vendor management;

• Call center services;

• Installation and support for building systems;

• Program development, management and maintenance for energy systems;

• Technical consulting and diagnostic services;

• Infrastructure and building projects for federal, state and local governmental agencies and bodies;

• Small modification and retrofit projects; and

• Retrofit projects to comply with clean air laws.

Our industrial services are provided to refineries and petrochemical plants and include:

• On-site repairs, maintenance and service of heat exchangers, towers, vessels and piping;

• Design, manufacturing, repair and hydro blast cleaning of shell and tube heat exchangers and related equipment;

• Refinery turnaround planning and engineering services;

• Specialty welding services;

• Overhaul and maintenance of critical process units in refineries and petrochemical plants; and

• Specialty technical services for refineries and petrochemical plants.

We provide construction services and building services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide our construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, property managers and other subcontractors. Our industrial services generally are provided directly to refineries and petrochemical plants. Worldwide, as of December 31, 2013, we had over 27,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2013 revenues, approximately 93% were generated in the United States and approximately 7% were generated in foreign countries, substantially all in the United Kingdom. In 2013, approximately 36% of revenues were derived from new construction projects, 19% were derived from renovation and retrofit of customer's existing facilities, 37% were derived from building services operations, and 8% were derived from industrial services operations.

The broad scope of our operations is more particularly described below. For information regarding the revenues, operating income and total assets of each of our segments with respect to each of the last three years, and our revenues and assets attributable to the United States and the United Kingdom for the last three years, see Note 17 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Operations

The electrical and mechanical construction services industry has grown over the years due principally to the increased content, complexity and sophistication of electrical and mechanical systems, as well as the installation of more technologically advanced voice and data communications, lighting and environmental control systems in all types of facilities in large part due to the integration of digital processing and information technology. For these reasons, buildings need extensive electrical distribution systems. In addition, advanced voice and data communication systems require sophisticated power supplies and extensive low-voltage and fiber-optic communications cabling. Moreover, the need for substantial environmental controls within a building, due to the heightened need for climate control to maintain extensive computer systems at optimal temperatures, and the demand for energy savings and environmental control in individual spaces have over the years expanded opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Electrical and mechanical construction services primarily involve the design, integration, installation and start-up and provision of services relating to: (a) electric power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems and related switch gear and controls; (b) premises electrical and lighting systems, including fixtures and controls; (c) low-voltage systems, such as fire alarm, security and process control systems; (d) voice and data communications systems, including fiber-optic and low-voltage cabling; (e) roadway and transit lighting and fiber-optic lines; (f) heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; (g) fire protection systems; (h) plumbing, process and high-purity piping systems; (i) controls and filtration systems; (j) water and wastewater treatment systems; (k) central plant heating and cooling systems; (l) cranes and rigging; (m) millwrighting; and (n) steel fabrication, erection and welding.

Electrical and mechanical construction services generally fall into one of two categories: (a) large installation projects with contracts often in the multi-million dollar range that involve construction of manufacturing and commercial buildings and institutional and public works projects or the fit-out of large blocks of space within commercial buildings and (b) smaller installation projects typically involving fit-out, renovation and retrofit work.

Our United States electrical and mechanical construction services operations accounted for about 53% of our 2013 revenues, approximately 67% of which were related to new construction and approximately 33% of which were related to renovation and retrofit projects. Our United Kingdom electrical and mechanical construction services operations accounted for approximately 2% of our 2013 revenues, approximately 46% of which were related to new construction and approximately 54% of which were related to renovation and retrofit projects. However, in mid-2013, we announced our decision to end our construction operations in the United Kingdom due to recurring losses over the last several years and our negative assessment of construction market conditions in the United Kingdom. We plan to focus in the United Kingdom solely on building services.

We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for institutional purposes (such as educational and correctional facilities and research laboratories); (b) for manufacturing purposes (such as pharmaceutical plants, steel, pulp and paper mills, chemical, food, automotive and semiconductor manufacturing facilities and power generation); (c) for transportation purposes (such as highways, airports and transit systems); (d) for commercial purposes (such as office buildings, data centers, convention centers, sports stadiums, shopping malls and resorts); (e) for hospitality purposes (such as hotels and casinos); (f) for water and wastewater purposes; and (g) for healthcare purposes. Our largest projects, which typically range in size from $10.0 million up to and occasionally exceeding $150.0 million and are frequently multi-year projects, represented approximately 33% of our worldwide construction services revenues in 2013.

Our projects of less than $10.0 million accounted for approximately 67% of our worldwide construction services revenues in 2013. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, or changes in the customer's plant or office layout in the normal course of a customer's business.

We have a broad customer base with many long-standing relationships. We perform construction services pursuant to contracts with owners, such as corporations, municipalities and other governmental entities, general contractors, systems suppliers, construction managers, developers, other subcontractors and tenants of commercial properties. Institutional and public works

projects are frequently long-term complex projects that require significant technical and management skills and the financial strength to obtain bid and performance bonds, which are often a condition to bidding for and winning these projects.

We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, in the United States, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States building services segment offers a broad range of services, including operation, maintenance and service of electrical and mechanical systems; commercial and government site-based operations and maintenance; facility maintenance and services, including outage services to utilities and manufacturing facilities; military base operations support services; mobile mechanical maintenance and services; floor care and janitorial services; landscaping, lot sweeping and snow removal; facilities management; vendor management; call center services; installation and support for building systems; program development, management and maintenance with respect to energy systems; technical consulting and diagnostic services; infrastructure and building projects for federal, state and local governmental agencies and bodies; small modification and retrofit projects; and retrofit projects to comply with clean air laws.

These building services, which generated approximately 37% of our 2013 revenues, are provided to owners, operators, tenants and managers of all types of facilities both on a contract basis for a specified period of time and on an individual task order basis. Of our 2013 building services revenues, approximately 88% were generated in the United States and approximately 12% were generated in the United Kingdom.

Our building services operations have built upon our traditional electrical and mechanical services operations, facilities services activities of our electrical and mechanical contracting subsidiaries, and our client relationships, as well as acquisitions, to expand the scope of services being offered and to develop packages of services for customers on a regional and national basis.

Demand for our building services is often driven by customers' decisions to focus on their core competencies, customers' programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, voice and data and other systems, and the need for increased reliability, especially in electrical and mechanical systems. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer's core business. Clients of our building services business include federal and state governments, utilities, independent power producers, pulp and paper producers and major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, publishing and other manufacturing, and large retailers and other businesses with multiple locations throughout the United States.

We currently provide building services in a majority of the states in the United States to commercial, industrial, institutional and governmental customers and as part of our operations are responsible for: (a) the oversight of all or most of the facilities operations of a business, including operation and maintenance; (b) servicing, upgrade and retrofit of HVAC, electrical, plumbing and industrial piping and sheet metal systems in existing facilities; (c) interior and exterior services, including floor care and janitorial services, landscaping, lot sweeping and snow removal; (d) diagnostic and solution engineering for building systems and their components; and (e) maintenance and support services to manufacturers and power producers.

In the Washington D.C. metropolitan area, we provide building services at a number of preeminent buildings, including those that house the Secret Service, The Federal Deposit Insurance Corporation, the National Foreign Affairs Training Center, and the Department of Health and Human Services, as well as other government facilities including the NASA Jet Propulsion Laboratory in Pasadena, California. We also provide building services to a number of military bases, including base operations support services to the Navy National Capital Region and the Army's Fort Huachuca, Arizona, and are also involved in joint ventures providing building services to the Naval Base Kitsap in the State of Washington. The agreements pursuant to which this division provides services to the federal government are frequently for a term of five years, are subject to renegotiation of terms and prices by the government, and are subject to termination by the government prior to the expiration of the term.

Our United Kingdom subsidiary primarily focuses on building services and currently provides a broad range of services under multi-year agreements to public and private sector customers, including airlines, airports, real estate property managers, manufacturers and governmental agencies.

Our industrial services business is a recognized leader in the refinery turnaround market and has a growing presence in the petrochemical market. In July 2013, we acquired RepconStrickland, Inc. expanding services we provide to our refinery and petrochemical customers and significantly increasing the size of our industrial services business. Our industrial services business: (a) provides after-market maintenance, repair and cleaning services for highly engineered shell and tube heat exchangers for refineries and petrochemical plants both in the field and at our own shops, including tube and shell repairs, bundle repairs, and

extraction services, and (b) designs and manufactures new highly engineered shell and tube heat exchangers. We also perform a broad range of turnaround and maintenance services for critical units of refineries so as to upgrade, repair and maintain them. Such services include turnaround and maintenance services relating to: (i) engineering and planning services in advance of complex refinery turnarounds, (ii) overhaul and maintenance of critical process units (including hydrofluoric alkylation units, fluid catalytic cracking units, coking units, heaters, heat exchangers and related mechanical equipment) during refinery and petrochemical plant shut downs, (iii) general revamps and capital projects for refineries and petrochemical plants, and (iv) other related specialty technical services such as (a) welding, including pipe welding, and fabrication; heater, boiler, and reformer repairs and revamps; converter repair and revamps; and vessel, exchanger and tower services; (b) tower and column repairs and revamps in refineries; (c) installation and repair of refractory materials for critical units in process plants so as to protect equipment from corrosion, erosion, and extreme temperatures; and (d) acid-proofing services to protect critical components at refineries from chemical exposure.

Competition

In our construction services, building services and industrial services businesses, we compete with national, regional and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area.

We believe that the electrical and mechanical construction services businesses are highly fragmented and our competition includes thousands of small companies across the United States. In the United States, there are a few public companies focused on providing either electrical and/or mechanical construction services, such as Integrated Electrical Services, Inc., Comfort Systems USA, Inc. and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability and financial strength. Because we have total assets, annual revenues, net worth, access to bank credit and surety bonding and expertise significantly greater than most of our competitors, we believe we have a significant competitive advantage over our competitors in providing electrical and mechanical construction services. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure; (e) relationships with customers; (f) geographic diversity; (g) the ability to control project costs; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital; (k) access to bank credit; and (l) price. However, there are relatively few significant barriers to entry to several types of our construction services business.

While the building services business is also highly fragmented with most competitors operating in a specific geographic region, a number of large United States based corporations such as AECOM Technology Corporation, Johnson Controls, Inc., Fluor Corp., J&J Worldwide Services, DTZ, the Washington Division of URS Corporation, CB Richard Ellis, Inc., Jones Lang LaSalle and ABM Facility Services are engaged in this field, as are large original equipment manufacturers such as Carrier Corp. and Trane Air Conditioning. In addition, we compete with several regional firms serving all or portions of the markets we target, such as FM Facility Maintenance, Bergensons Property Services, Inc., SMS Assist, LLC and Ferandino & Sons, Inc. Our principal services competitors in the United Kingdom include ISS UK Ltd. and MITIE Group plc. The key competitive factors in the building services business include price, service, quality, technical expertise, geographic scope and the availability of qualified personnel and managers. Due to our size, both financial and geographic, and our technical capability and management experience, we believe we are in a strong competitive position in the building services business. However, there are relatively few barriers to entry to most of our building services businesses.

In our industrial services business, we are the leading North American provider of after-market maintenance and repair services for, and manufacturing of, highly engineered shell and tube heat exchangers and related equipment and a leader in providing specialized services to refineries and petrochemical plants. The market for providing these services and products to refineries and petrochemical plants is highly fragmented and includes large national industrial services providers, as well as numerous regional companies, including JV Industrial Companies Ltd., Matrix Service Company, Starcon, Turner Industries, Team, Inc., Cust-O-Fab, Dunn Heat, and Wyatt Field Service Company. In the manufacture of heat exchangers, we compete with both U.S. and foreign manufacturers. The key competitive factors in the industrial services market include service, quality, ability to respond quickly, technical expertise, price, safety record and availability of qualified personnel. Due to our technical capabilities, safety record and skilled workforce, we believe that we are in a strong competitive position in the industrial services market we serve. Because of the complex tasks associated with turnarounds and precision required in the manufacture of heat exchangers, we believe that the barriers to entry in this business are significant.

Employees

At December 31, 2013, we employed over 27,000 people, approximately 57% of whom are represented by various unions pursuant to more than 375 collective bargaining agreements between our individual subsidiaries and local unions. We believe that our employee relations are generally good. Only two of these collective bargaining agreements are national or regional in scope.

Backlog

Our backlog at December 31, 2013 was $3.36 billion compared to $3.37 billion of backlog at December 31, 2012. Backlog increases with awards of new contracts and decreases as we perform work on existing contracts. Backlog is not a term recognized under United States generally accepted accounting principles; however, it is a common measurement used in our industry. We include a project within our backlog at such time as a contract is awarded. Backlog includes unrecognized revenues to be realized from uncompleted construction contracts plus unrecognized revenues expected to be realized over the remaining term of services contracts. However, we do not include in backlog contracts for which we are paid on a time and material basis, and if the remaining term of a services contract exceeds 12 months, the unrecognized revenues attributable to such contract included in backlog are limited to only the next 12 months of revenues provided for in the initial contract award. Our backlog also includes amounts related to services contracts for which a fixed price contract value is not assigned; however, a reasonable estimate of total revenues can be made from budgeted amounts agreed to with our customer. Our backlog is comprised of: (a) original contract amounts, (b) change orders for which we have received written confirmations from our customers, (c) pending change orders for which we expect to receive confirmations in the ordinary course of business and (d) claim amounts that we have made against customers for which we have determined we have a legal basis under existing contractual arrangements and as to which we consider collection to be probable. Claim amounts recorded were immaterial for all periods presented. Our backlog does not include anticipated revenues from unconsolidated joint ventures or variable interest entities and anticipated revenues from pass-through costs on contracts for which we are acting in the capacity of an agent and which are reported on the net basis. We believe our backlog is firm, although many contracts are subject to cancellation at the election of our customers. Historically, cancellations have not had a material adverse effect on us. We estimate that 84% of our backlog as of December 31, 2013 will be recognized as revenues during 2014.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC's web site at http://www.sec.gov. You may also read and copy any document we file at the SEC's Public Reference Room located at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the Public Reference Room.

Our Internet address is www.emcorgroup.com. We make available free of charge through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC.

Our Board of Directors has an audit committee, a compensation and personnel committee, a nominating and corporate governance committee and a risk oversight committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, can be obtained free of charge from our web site, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States, the United Kingdom and in the world. In 2012, we had revenues of approximately $6.3 billion. We provide services to a broad range of commercial, industrial, utility and institutional customers through approximately 70 operating subsidiaries and joint venture entities. Our offices are located in the United States and the United Kingdom. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in facilities of all types and in providing comprehensive services for the operation, maintenance and management of substantially all aspects of such facilities, commonly referred to as “facilities services.”

We design, integrate, install, start-up, operate and maintain various electrical and mechanical systems, including:

• Electric power transmission and distribution systems;

• Premises electrical and lighting systems;

• Low-voltage systems, such as fire alarm, security and process control systems;

• Voice and data communications systems;

• Roadway and transit lighting and fiber optic lines;

• Heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems;

• Fire protection systems;

• Plumbing, process and high-purity piping systems;

• Controls and filtration systems;

• Water and wastewater treatment systems;

• Central plant heating and cooling systems;

• Crane and rigging services;

• Millwright services; and

• Steel fabrication, erection, and welding services.

Our facilities services operations, many of which support the operation of a customer's facilities, include:

• Industrial maintenance and services, including those for refineries and petrochemical plants;

• Outage services to utilities and industrial plants;

• Commercial and government site-based operations and maintenance;

• Military base operations support services;

• Mobile mechanical maintenance and services;

• Floor care and janitorial services;

• Landscaping, lot sweeping and snow removal;

• Facilities management;

• Vendor management;

• Call center services;

• Installation and support for building systems;

• Program development, management and maintenance for energy systems;

• Technical consulting and diagnostic services;

• Small modification and retrofit projects; and

• Retrofit projects to comply with clean air laws.

Facilities services are provided to a wide range of commercial, industrial, utility, institutional and governmental facilities.

We provide construction services and facilities services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide these services indirectly by acting as a subcontractor to general contractors, systems suppliers, property managers and other subcontractors. Worldwide, as of December 31, 2012, we had over 26,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2012 revenues, approximately 92% were generated in the United States and approximately 8% were generated in the United Kingdom. In 2012, approximately 39% of revenues were derived from new construction projects, 17% were derived from renovation and retrofit of customer's existing facilities, and 44% were derived from facilities services operations.

The broad scope of our operations is more particularly described below. For information regarding the revenues, operating income and total assets of each of our segments with respect to each of the last three years, and our revenues and assets attributable to the United States, the United Kingdom and all other foreign countries for the last three years, see Note 18 - Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Operations

The electrical and mechanical construction services industry has grown over the years due principally to the increased content, complexity and sophistication of electrical and mechanical systems, as well as the installation of more technologically advanced voice and data communications, lighting and environmental control systems in all types of facilities in large part due to the integration of digital processing and information technology. For these reasons, buildings need extensive electrical distribution systems. In addition, advanced voice and data communication systems require sophisticated power supplies and extensive low-voltage and fiber-optic communications cabling. Moreover, the need for substantial environmental controls within a building, due to the heightened need for climate control to maintain extensive computer systems at optimal temperatures, and the demand for energy savings and environmental control in individual spaces have over the years expanded opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Electrical and mechanical construction services primarily involve the design, integration, installation and start-up and provision of services relating to: (a) electric power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems and related switch gear and controls; (b) premises electrical and lighting systems, including fixtures and controls; (c) low-voltage systems, such as fire alarm, security and process control systems; (d) voice and data communications systems, including fiber-optic and low-voltage cabling; (e) roadway and transit lighting and fiber-optic lines; (f) heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; (g) fire protection systems; (h) plumbing, process and high-purity piping systems; (i) controls and filtration systems; (j) water and wastewater treatment systems; (k) central plant heating and cooling systems; (l) cranes and rigging; (m) millwrighting; and (n) steel fabrication, erection and welding.

Electrical and mechanical construction services generally fall into one of two categories: (a) large installation projects with contracts often in the multi-million dollar range that involve construction of industrial and commercial buildings and institutional and public works projects or the fit-out of large blocks of space within commercial buildings and (b) smaller installation projects typically involving fit-out, renovation and retrofit work.

Our United States electrical and mechanical construction services operations accounted for about 53% of our 2012 revenues, approximately 71% of which were related to new construction and approximately 29% of which were related to renovation and

retrofit projects. Our United Kingdom electrical and mechanical construction services operations accounted for approximately 3% of our 2012 revenues, approximately 53% of which were related to new construction and approximately 47% of which were related to renovation and retrofit projects. We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for institutional use (such as water and wastewater treatment facilities, hospitals, correctional facilities and research laboratories); (b) for industrial use (such as pharmaceutical plants, steel, pulp and paper mills, chemical, food, automotive and semiconductor manufacturing facilities and oil refineries); (c) for transportation projects (such as highways, airports and transit systems); (d) for commercial use (such as office buildings, data centers, hotels, casinos, convention centers, sports stadiums, shopping malls and resorts); and (e) for power generation and energy management projects. Our largest projects, which typically range in size from $10.0 million up to and occasionally exceeding $150.0 million and are frequently multi-year projects, represented approximately 33% of our worldwide construction services revenues in 2012.

Our projects of less than $10.0 million accounted for approximately 67% of our worldwide construction services revenues in 2012. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, or changes in the customer's plant or office layout in the normal course of a customer's business.

We have a broad customer base with many long-standing relationships. We perform services pursuant to contracts with owners, such as corporations, municipalities and other governmental entities, general contractors, systems suppliers, construction managers, developers, other subcontractors and tenants of commercial properties. Institutional and public works projects are frequently long-term complex projects that require significant technical and management skills and the financial strength to obtain bid and performance bonds, which are often a condition to bidding for and winning these projects.

We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, in the United States, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States facilities services operations provide facilities services to a wide range of commercial, industrial, utility, institutional and governmental facilities.

These facilities services, which generated approximately 44% of our 2012 revenues, are provided to owners, operators, tenants and managers of all types of facilities both on a contract basis for a specified period of time and on an individual task order basis. Of our 2012 facilities services revenues, approximately 88% were generated in the United States and approximately 12% were generated in the United Kingdom.

Our facilities services operations have built upon our traditional electrical and mechanical services operations, facilities services activities of our electrical and mechanical contracting subsidiaries, and our client relationships, as well as acquisitions, to expand the scope of services being offered and to develop packages of services for customers on a regional and national basis.

Our United States facilities services segment offers a broad range of facilities services, including operation, maintenance and service of electrical and mechanical systems; industrial maintenance and services, including outage services to utilities and industrial plants; commercial and government site-based operations and maintenance; military base operations support services; mobile mechanical maintenance and services; floor care and janitorial services; landscaping, lot sweeping and snow removal; facilities management; vendor management; call center services; installation and support for building systems; program development, management and maintenance with respect to energy systems; technical consulting and diagnostic services; infrastructure and building projects for federal, state and local governmental agencies and bodies; small modification and retrofit projects; and retrofit projects to comply with clean air laws.

Demand for our facilities services is often driven by customers' decisions to focus on their core competencies, customers' programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, voice and data and other systems, and the need for increased reliability, especially in electrical and mechanical systems. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer's core business. Clients of our facilities services business include federal and state governments, utilities, independent power producers, refineries, pulp and paper producers and major

corporations engaged in information technology, telecommunications, pharmaceuticals, petrochemicals, financial services, publishing and other manufacturing, and large retailers and other businesses with multiple locations throughout the United States.

We currently provide facilities services in a majority of the states in the United States to commercial, industrial, institutional and governmental customers and as part of our operations are responsible for: (a) the oversight of all or most of the facilities operations of a business, including operation and maintenance; (b) servicing, upgrade and retrofit of HVAC, electrical, plumbing and industrial piping and sheet metal systems in existing facilities; (c) interior and exterior services, including floor care and janitorial services, landscaping, lot sweeping and snow removal; (d) diagnostic and solution engineering for building systems and their components; (e) maintenance and support services to manufacturers and power producers; and (f) services for refineries and petrochemical plants.

In the Washington D.C. metropolitan area, we provide facilities services at a number of preeminent buildings, including those that house the Secret Service, the Federal Deposit Insurance Corporation, the National Affairs Training Center, and the Department of Health and Human Services, as well as other government facilities including the NASA Jet Propulsion Laboratory in Pasadena, California. We also provide facilities services to a number of military bases, including base operations support services to the Navy Capital Region and Fort Huachuca, Arizona, and are also involved in joint ventures providing facilities services to the Naval Base Kitsap in the State of Washington. The agreements pursuant to which this division provides services to the federal government are frequently for a term of five to ten years, are subject to renegotiation of terms and prices by the government, and are subject to termination by the government prior to the expiration of the term.

As part of our facilities services operations, we also provide aftermarket maintenance, repair and cleaning services for highly engineered shell and tube heat exchangers for refineries and the petrochemical industry both at our facilities and in the field. These services are tailored to meet customer needs for scheduled turnarounds or specialty callout service.

Our United Kingdom subsidiary also has a division that focuses on facilities services. This division currently provides a broad range of facilities services under multi-year agreements to public and private sector customers, including airlines, airports, real estate property managers, manufacturers and governmental agencies.

Competition

In both our construction services and facilities services businesses, we compete with national, regional and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area.

We believe that the electrical and mechanical construction services business is highly fragmented and our competition includes thousands of small companies across the United States and in the United Kingdom. In the United States, there are a few public companies focused on providing either electrical and/or mechanical construction services, such as Integrated Electrical Services, Inc., Comfort Systems USA, Inc. and Tutor Perini Corporation. Our principal competitors in the United Kingdom include Carillion plc and MITIE Group plc. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability and financial strength. Because we have total assets, annual revenues, net worth, access to bank credit and surety bonding and expertise significantly greater than most of our competitors, we believe we have a significant competitive advantage over our competitors in providing electrical and mechanical construction services. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure; (e) relationships with customers; (f) geographic diversity; (g) the ability to control project costs; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital; (k) access to bank credit; and (l) price. However, there are relatively few significant barriers to entry to several types of our construction services business.

While the facilities services business is also highly fragmented with most competitors operating in a specific geographic region, a number of large United States based corporations such as AECOM Technology Corporation, Johnson Controls, Inc., Fluor Corp., J&J Worldwide Services, UNICCO Service Company, the Washington Division of URS Corporation, CB Richard Ellis, Inc., Jones Lang LaSalle and ABM Facility Services are engaged in this field, as are large original equipment manufacturers such as Carrier Corp. and Trane Air Conditioning. In addition, we compete with several regional firms serving all or portions of the markets we target, such as FM Facility Maintenance, Bergensons Property Services, Inc., SMS Assist, LLC and Ferandino & Sons, Inc. With respect to our industrial services operations, we are a leading North American provider of aftermarket maintenance and repair services for highly engineered shell and tube heat exchangers. The key competitive factors in the facilities services business include price, service, quality, technical expertise, geographic scope and the availability of qualified personnel and managers. Due to our size, both financial and geographic, and our technical capability and management experience, we believe we are in a strong competitive position in the facilities services business. However, there are relatively few barriers to entry to most of our facilities services businesses.

Employees

At December 31, 2012, we employed over 26,000 people, approximately 58% of whom are represented by various unions pursuant to more than 375 collective bargaining agreements between our individual subsidiaries and local unions. We believe that our employee relations are generally good. Only two of these collective bargaining agreements are national or regional in scope.

Backlog

Our backlog at December 31, 2012 was $3.37 billion compared to $3.33 billion of backlog at December 31, 2011. Backlog increases with awards of new contracts and decreases as we perform work on existing contracts. Backlog is not a term recognized under United States generally accepted accounting principles; however, it is a common measurement used in our industry. Backlog includes unrecognized revenues to be realized from uncompleted construction contracts plus unrecognized revenues expected to be realized over the remaining term of the facilities services contracts. If the remaining term of a facilities services contract exceeds 12 months, the unrecognized revenues attributable to such contract included in backlog are limited to only the next 12 months of revenues.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC's web site at http://www.sec.gov. You may also read and copy any document we file at the SEC's Public Reference Room located at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the Public Reference Room.

Our Internet address is www.emcorgroup.com. We make available free of charge through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC.

Our Board of Directors has an audit committee, a compensation and personnel committee, and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, can be obtained free of charge from our web site, www.emcorgroup.com.

You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States, the United Kingdom and in the world. In 2011, we had revenues of approximately $5.6 billion. We provide services to a broad range of commercial, industrial, utility and institutional customers through approximately 70 operating subsidiaries and joint venture entities. Our offices are located in the United States and the United Kingdom. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in facilities of all types and in providing comprehensive services for the operation, maintenance and management of substantially all aspects of such facilities, commonly referred to as “facilities services.”

We design, integrate, install, start-up, operate and maintain various electrical and mechanical systems, including:

• Electric power transmission and distribution systems;

• Premises electrical and lighting systems;

• Low-voltage systems, such as fire alarm, security and process control systems;

• Voice and data communications systems;

• Roadway and transit lighting and fiber optic lines;

• Heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems;

• Fire protection systems;

• Plumbing, process and high-purity piping systems;

• Controls and filtration systems;

• Water and wastewater treatment systems;

• Central plant heating and cooling systems;

• Crane and rigging services;

• Millwright services; and

• Steel fabrication, erection, and welding services.

Our facilities services operations, many of which support the operation of a customer’s facilities, include:

• Industrial maintenance and services, including those for refineries and petrochemical plants;

• Outage services to utilities and industrial plants;

• Commercial and government site-based operations and maintenance;

• Military base operations support services;

Table of Contents

• Mobile mechanical maintenance and services;

• Floor care and janitorial services;

• Landscaping, lot sweeping and snow removal;

• Facilities management;

• Installation and support for building systems;

• Program development, management and maintenance for energy systems;

• Technical consulting and diagnostic services;

• Small modification and retrofit projects; and

• Retrofit projects to comply with clean air laws.

Facilities services are provided to a wide range of commercial, industrial, utility, institutional and governmental facilities.

We provide construction services and facilities services directly to corporations, municipalities and federal and state governmental entities, owners/developers, and tenants of buildings. We also provide these services indirectly by acting as a subcontractor to general contractors, systems suppliers, property managers and other subcontractors. Worldwide, as of December 31, 2011, we had over 25,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2011 revenues, approximately 91% were generated in the United States and approximately 9% were generated in the United Kingdom. In 2011, approximately 36% of revenues were derived from new construction projects, 20% were derived from renovation and retrofit of customer’s existing facilities, and 44% were derived from facilities services operations.

The broad scope of our operations is more particularly described below. For information regarding the revenues and operating income of each of our segments with respect to each of the last three years, total assets of each of our segments with respect to each of the last two years, and our revenues and assets attributable to the United States, the United Kingdom and all other foreign countries, see Note 19—Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Operations

The electrical and mechanical construction services industry has grown over the years due principally to the increased content, complexity and sophistication of electrical and mechanical systems, as well as the installation of more technologically advanced voice and data communications, lighting and environmental control systems in all types of facilities in large part due to the integration of digital processing and information technology in all types of projects. For these reasons, buildings need extensive electrical distribution systems. In addition, advanced voice and data communication systems require more sophisticated power supplies and extensive low-voltage and fiber-optic communications cabling. Moreover, the need for substantial environmental controls within a building, due to the heightened need for climate control to maintain extensive computer systems at optimal temperatures, and the demand for energy savings and environmental control in individual spaces have over the years expanded opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Electrical and mechanical construction services primarily involve the design, integration, installation and start-up and provision of services relating to: (a) electric power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems and related switch gear and controls; (b) premises

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electrical and lighting systems, including fixtures and controls; (c) low-voltage systems, such as fire alarm, security and process control systems; (d) voice and data communications systems, including fiber-optic and low-voltage cabling; (e) roadway and transit lighting and fiber-optic lines; (f) heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; (g) fire protection systems; (h) plumbing, process and high-purity piping systems; (i) controls and filtration systems; (j) water and wastewater treatment systems; (k) central plant heating and cooling systems; (l) cranes and rigging; (m) millwrighting; and (n) steel fabrication, erection and welding.

Electrical and mechanical construction services generally fall into one of two categories: (a) large installation projects with contracts often in the multi-million dollar range that involve construction of industrial and commercial buildings and institutional and public works projects or the fit-out of large blocks of space within commercial buildings and (b) smaller installation projects typically involving fit-out, renovation and retrofit work.

Our United States electrical and mechanical construction services operations accounted for about 52% of our 2011 revenues, of which revenues of approximately 65% were related to new construction and approximately 35% were related to renovation and retrofit projects. Our United Kingdom electrical and mechanical construction services operations accounted for approximately 4% of our 2011 revenues, of which revenues of approximately 54% were related to new construction and approximately 46% were related to renovation and retrofit projects. We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for institutional use (such as water and wastewater treatment facilities, hospitals, correctional facilities and research laboratories); (b) for industrial use (such as pharmaceutical plants, steel, pulp and paper mills, chemical, food, automotive and semiconductor manufacturing facilities and oil refineries); (c) for transportation projects (such as highways, airports and transit systems); (d) for commercial use (such as office buildings, data centers, hotels, casinos, convention centers, sports stadiums, shopping malls and resorts); and (e) for power generation and energy management projects. Our largest projects, which typically range in size from $10.0 million up to and occasionally exceeding $150.0 million and are frequently multi-year projects, represented approximately 31% of our construction services revenues in 2011.

Our projects of less than $10.0 million accounted for approximately 69% of our 2011 electrical and mechanical construction services revenues. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

We have a broad customer base with many long-standing relationships. We perform services pursuant to contracts with owners, such as corporations, municipalities and other governmental entities, general contractors, systems suppliers, construction managers, developers, other subcontractors and tenants of commercial properties. Institutional and public works projects are frequently long-term complex projects that require significant technical and management skills and the financial strength to obtain bid and performance bonds, which are often a condition to bidding for and winning these projects.

We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, in the United States, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States facilities services operations provide facilities services to a wide range of commercial, industrial, utility, institutional and governmental facilities.

These facilities services, which generated approximately 44% of our 2011 revenues, are provided to owners, operators, tenants and managers of all types of facilities both on a contract basis for a specified period of time and on an individual task order basis. Of our 2011 facilities services revenues, approximately 88% were generated in the United States and approximately 12% were generated in the United Kingdom.

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Our facilities services operations have built on our traditional electrical and mechanical services operations, facilities services activities of our electrical and mechanical contracting subsidiaries, and our client relationships, as well as acquisitions, to expand the scope of services being offered and to develop packages of services for customers on a regional and national basis.

Our United States facilities services segment offers a broad range of facilities services, including operation, maintenance and service of electrical and mechanical systems; industrial maintenance and services, including outage services to utilities and industrial plants; commercial and government site-based operations and maintenance; military base operations support services; mobile mechanical maintenance and services; floor care and janitorial services; landscaping, lot sweeping and snow removal; facilities management; installation and support for building systems; program development, management and maintenance with respect to energy systems; technical consulting and diagnostic services; infrastructure and building projects for federal, state and local governmental agencies and bodies; small modification and retrofit projects; and retrofit projects to comply with clean air laws.

Demand for our facilities services is often driven by customers’ decisions to focus on their own core competencies, customers’ programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, voice and data and other systems, and the need for increased reliability, especially in electrical and mechanical systems. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our facilities services business include the federal government, utilities, independent power producers, refineries, pulp and paper producers and major corporations engaged in information technology, telecommunications, pharmaceuticals, petrochemicals, financial services, publishing and other manufacturing, and large retailers and other businesses with multiple locations throughout the United States or regions of the country.

We currently provide facilities services in a majority of the states in the United States to commercial, industrial, institutional and governmental customers and as part of our operations are responsible for: (a) the oversight of all or most of the facilities operations of a business, including operation and maintenance; (b) the oversight of logistical processes; (c) servicing, upgrade and retrofit of HVAC, electrical, plumbing and industrial piping and sheet metal systems in existing facilities; (d) interior and exterior services, including floor care and janitorial services, landscaping, lot sweeping and snow removal; (e) diagnostic and solution engineering for building systems and their components; (f) maintenance and support services to manufacturers and power producers; and (g) services for refineries and petrochemical plants.

In the Washington D.C. metropolitan area, we provide facilities services at a number of preeminent buildings, including those that house the Secret Service, the Federal Deposit Insurance Corporation, the World Bank, the National Affairs Training Center, and the Department of Health and Human Services. We also provide facilities services to a number of military bases, including base operations support services to the Navy Capital Region, and are also involved in joint ventures providing facilities services to the Naval Base Kitsap in the State of Washington. The agreements pursuant to which this division provides services to the federal government are subject to renegotiation of terms and prices by the government, termination by the government prior to the expiration of the term, and non-renewal.

As part of our facilities services operations, we also provide aftermarket maintenance and repair services for highly engineered shell and tube heat exchangers for refineries and the petrochemical industry both at facilities and in the field. These services are tailored to meet customer needs for scheduled turnarounds or specialty callout service.

Our United Kingdom subsidiary also has a division that focuses on facilities services. This division currently provides a broad range of facilities services under multi-year agreements to public and private sector customers, including airlines, airports, real estate property managers, manufacturers and governmental agencies.

Competition

In both our construction services and facilities services businesses, we compete with national, regional and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area.

We believe that the electrical and mechanical construction services business is highly fragmented and our competition includes thousands of small companies across the United States and around the world. However, there are a few United States based public companies focused on providing either electrical and/or mechanical construction services, such as Integrated Electrical Services, Inc., Comfort Systems USA, Inc. and Tutor Perini Corporation. A majority of our revenues are derived from projects requiring

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competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability and financial strength. Because we have total assets, annual revenues, net worth, access to bank credit and surety bonding and expertise significantly greater than most of our competitors, we believe we have a significant competitive advantage over our competitors in providing electrical and mechanical construction services. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure; (e) relationships with customers; (f) geographic diversity; (g) the ability to control project costs; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital; (k) access to bank credit; and (l) price. However, there are relatively few significant barriers to entry to several types of our construction services business.

While the facilities services business is also highly fragmented with most competitors operating in a specific geographic region, a number of large United States based corporations such as Johnson Controls, Inc., Fluor Corp., UNICCO Service Company, the Washington Division of URS Corporation, CB Richard Ellis, Inc., Jones Lang LaSalle and ABM Facility Services are engaged in this field, as are large original equipment manufacturers such as Carrier Corp. and Trane Air Conditioning. In addition, we compete with several regional firms serving all or portions of the markets we target, such as FM Facility Maintenance, Bergensons Property Services, Inc., SMS Assist, LLC and Ferandino & Sons, Inc. With respect to our industrial services operations, we are a leading North American provider of aftermarket maintenance and repair services for highly engineered shell and tube heat exchangers. The key competitive factors in the facilities services business include price, service, quality, technical expertise, geographic scope and the availability of qualified personnel and managers. Due to our size, both financial and geographic, and our technical capability and management experience, we believe we are in a strong competitive position in the facilities services business.

Employees

At December 31, 2011, we employed over 25,000 people, approximately 61% of whom are represented by various unions pursuant to more than 400 collective bargaining agreements between our individual subsidiaries and local unions. We believe that our employee relations are generally good. Only two of these collective bargaining agreements are national or regional in scope.

Backlog

We had backlog as of December 31, 2011 of approximately $3.3 billion, compared with backlog of approximately $3.1 billion as of December 31, 2010, excluding backlog from our Canadian subsidiary, which we sold in August 2011. Backlog increases with awards of new contracts and decreases as we perform work on existing contracts. Backlog is not a term recognized under United States generally accepted accounting principles; however, it is a common measurement used in our industry. Backlog includes unrecognized revenues to be realized from uncompleted construction contracts plus unrecognized revenues expected to be realized over the remaining term of the facilities services contracts. However, if the remaining term of a facilities services contract exceeds 12 months, the unrecognized revenues attributable to such contract included in backlog are limited to only the next 12 months of revenues.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC’s web site at http://www.sec.gov. You may also read and copy any document we file at the SEC’s public reference room located at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the public reference room.

Our Internet address is www.emcorgroup.com. We make available free of charge through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC.

Our Board of Directors has an audit committee, a compensation and personnel committee, and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, can be obtained free of charge from our web site, www.emcorgroup.com.

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You may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and similar words refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States, Canada, the United Kingdom and in the world. In 2010, we had revenues of approximately $5.1 billion. We provide services to a broad range of commercial, industrial, utility and institutional customers through over 70 operating subsidiaries and joint venture entities. Our offices are located in the United States, Canada and the United Kingdom. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851-1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in facilities of all types and in providing comprehensive services for the operation, maintenance and management of substantially all aspects of such facilities, commonly referred to as “facilities services.”

We design, integrate, install, start-up, operate and maintain various electrical and mechanical systems, including:

• Electric power transmission and distribution systems; • Premises electrical and lighting systems; • Low-voltage systems, such as fire alarm, security and process control systems; • Voice and data communications systems; • Roadway and transit lighting and fiber optic lines; • Heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; • Fire protection systems; • Plumbing, process and high-purity piping systems; • Water and wastewater treatment systems; and • Central plant heating and cooling systems.

Our facilities services operations, many of which support the operation of a customer’s facilities, include:

• Industrial maintenance and services; • Outage services to utilities and industrial plants; • Commercial and government site-based operations and maintenance; • Military base operations support services; • Mobile maintenance and services; • Facilities management; • Installation and support for building systems; • Program development, management and maintenance for energy systems; • Shop and on-site field services for refineries and petrochemical plants; • Technical consulting and diagnostic services; • Infrastructure and building projects for federal, state and local governmental agencies and bodies; • Small modification and retrofit projects; and • Retrofit projects to comply with clean air laws.

Facilities services are provided to a wide range of commercial, industrial, utility and institutional facilities, including those to which we also provide construction services and others to which construction services are provided by others. Many of our varied

facilities services are often combined to provide integrated service packages, which include operations and maintenance, mobile mechanical services, energy management and facility improvement programs.

We provide construction services and facilities services directly to corporations, municipalities and other governmental entities, owners/developers, and tenants of buildings. We also provide these services indirectly by acting as a subcontractor to general contractors, systems suppliers, property managers and other subcontractors. Worldwide, as of December 31, 2010, we had over 24,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2010 revenues, approximately 86% were generated in the United States and approximately 14% were generated internationally. In 2010, approximately 42% of revenues were derived from new construction projects, 19% were derived from renovation and retrofit of customer’s existing facilities, and 39% were derived from facilities services operations.

The broad scope of our operations is more particularly described below. For information regarding the revenues and operating income of each of our segments with respect to each of the last three years, total assets of each of our segments with respect to each of the last two years, and our revenues and assets attributable to the United States, Canada, the United Kingdom and all other foreign countries, see Note 18 — Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data.

Operations

The electrical and mechanical construction services industry has grown over the years due principally to the increased content, complexity and sophistication of electrical and mechanical systems, as well as the installation of more technologically advanced voice and data communications, lighting and environmental control systems in all types of facilities in large part due to the integration of digital processing and information technology in all types of projects. For these reasons, buildings need extensive electrical distribution systems. In addition, advanced voice and data communication systems require more sophisticated power supplies and extensive low-voltage and fiber-optic communications cabling. Moreover, the need for substantial environmental controls within a building, due to the heightened need for climate control to maintain extensive computer systems at optimal temperatures, and the demand for energy savings and environmental control in individual spaces have over the years expanded opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Electrical and mechanical construction services primarily involve the design, integration, installation and start-up of: (a) electric power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems and related switch gear and controls; (b) premises electrical and lighting systems, including fixtures and controls; (c) low-voltage systems, such as fire alarm, security and process control systems; (d) voice and data communications systems, including fiber-optic and low-voltage cabling; (e) roadway and transit lighting and fiber-optic lines; (f) heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; (g) fire protection systems; (h) plumbing, process and high-purity piping systems; (i) water and wastewater treatment systems; and (j) central plant heating and cooling systems.

Electrical and mechanical construction services generally fall into one of two categories: (a) large installation projects with contracts often in the multi-million dollar range that involve construction of industrial and commercial buildings and institutional and public works facilities or the fit-out of large blocks of space within commercial buildings and (b) smaller installation projects typically involving fit-out, renovation and retrofit work.

Our United States electrical and mechanical construction services operations accounted for about 52% of our 2010 revenues, of which revenues of approximately 68% were related to new construction and approximately 32% were related to renovation and retrofit projects. Our United Kingdom and Canada electrical and mechanical construction services operations accounted for approximately 9% of our 2010 revenues, of which revenues of approximately 71% were related to new construction and approximately 29% were related to renovation and retrofit projects. We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects have included those: (a) for institutional use (such as water and wastewater treatment facilities, hospitals, correctional facilities and research laboratories); (b) for industrial use (such as pharmaceutical plants, steel, pulp and paper mills, chemical, food, automotive and semiconductor manufacturing facilities and oil refineries); (c) for transportation projects (such as highways, airports and transit systems); (d) for commercial use (such as office buildings, data centers, hotels, casinos, convention centers, sports stadiums, shopping malls and resorts); and (e) for power generation and energy management projects. Our largest projects, which typically range in size from $10.0 million up to and

occasionally exceeding $150.0 million and are frequently multi-year projects, represented approximately 39% of our construction services revenues in 2010.

Our projects of less than $10.0 million accounted for approximately 61% of our 2010 electrical and mechanical construction services revenues. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, trading floors in financial services businesses, new production lines in manufacturing plants and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, or changes in the customer’s plant or office layout in the normal course of a customer’s business.

We have a broad customer base with many long-standing relationships. We perform services pursuant to contracts with owners, such as corporations, municipalities and other governmental entities, general contractors, systems suppliers, construction managers, developers, other subcontractors and tenants of commercial properties. Institutional and public works projects are frequently long-term complex projects that require significant technical and management skills and the financial strength to obtain bid and performance bonds, which are often a condition to bidding for and winning these projects.

We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, in the United States, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States facilities services operations provide facilities services to a wide range of commercial, industrial and institutional facilities, including both those for which we have provided construction services and those for which construction services were provided by others. Facilities services are frequently bundled to provide integrated service packages and are provided on a mobile basis or by our employees based at customer sites. Through a recent acquisition of a government infrastructure project company headquartered in Jacksonville, Florida, we now offer diversified prime contracting services to federal and state government agencies and local municipalities.

These facilities services, which generated approximately 39% of our 2010 revenues, are provided to owners, operators, tenants and managers of all types of facilities both on a contract basis for a specified period of time and on an individual task order basis. Of our 2010 facilities services revenues, approximately 86% were generated in the United States and approximately 14% were generated internationally.

Our facilities services operations have built on our traditional electrical and mechanical services operations, facilities services activities at our electrical and mechanical contracting subsidiaries, and our client relationships, as well as acquisitions, to expand the scope of services being offered and to develop packages of services for customers on a regional and national basis.

Our United States facilities services segment offers a broad range of facilities services, including maintenance and service of electrical and mechanical systems, industrial maintenance and services, including outage services to utilities and industrial plants, commercial and government site-based operations and maintenance, military base operations support services, mobile maintenance and services, facilities management, installation and support for building systems, program development, management and maintenance of energy systems, technical consulting and diagnostic services, infrastructure and building projects for federal, state and local governmental agencies and bodies, small modification and retrofit projects and retrofit projects to comply with clean air laws.

Demand for our facilities services is often driven by customers’ decisions to focus on their own core competencies, customers’ programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, voice and data and other systems, and the need for increased reliability, especially in electrical and mechanical systems. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Clients of our facilities services business include the federal government, utilities, independent power producers, refineries, pulp and paper producers and major corporations engaged in information technology, telecommunications, pharmaceuticals, petrochemicals, financial services, publishing and other manufacturing.

In Washington D.C., we provide facilities services at a number of preeminent buildings, including those that house the Secret Service, the Federal Deposit Insurance Corporation, the World Bank, the Department of Veteran Affairs, and the Department of

Health and Human Services. We also provide facilities services to a number of military bases, including base operations support services to the Navy Capital Region, which, among other facilities, includes the Bethesda Naval Hospital, the Naval Research Laboratory and the Washington Navy Yard. We are also involved in joint ventures providing facilities services to the Navy, including one providing facilities services to the Naval Submarine Base in Bangor, Washington and the Naval Hospital in Bremerton, Washington. The agreements pursuant to which this division provides services to the federal government are subject to renegotiation of terms and prices by the government, termination by the government prior to the expiration of the term, and non-renewal.

Our facilities services operations also provide aftermarket maintenance and repair services, replacement parts and fabrication services for highly engineered shell and tube heat exchangers for refineries and the petrochemical industry. We provide in-shop repairs and customized design and manufacturing for heat exchangers, as well as related equipment on the U.S. Gulf Coast and at a facility in the Los Angeles, California area and provide cleaning services for heat exchangers at one of our Texas facilities. In addition, we provide aftermarket maintenance of shell and tube heat exchangers in the field. These services are tailored to meet customer needs for scheduled turnarounds or specialty callout service. We also have embedded multi-year contracts with refineries pursuant to which our crews and equipment are located at customers’ plants, allowing our employees to perform specialty services for heat exchangers and related equipment on a daily basis.

We currently provide facilities services in a majority of the states in the United States and as part of our operations are responsible for: (a) the oversight of all or most of the facilities operations of a business, including operation and maintenance; (b) the oversight of logistical processes; (c) servicing, upgrade and retrofit of HVAC, electrical, plumbing and industrial piping and sheet metal systems in existing facilities; (d) diagnostic and solution engineering for building systems and their components; (e) maintenance and support services to manufacturers and power producers; and (f) shop and on-site field services for refineries and petrochemical plants.

Our facilities services operations also provide energy services, which include the design, construction and operation of energy related projects and facilities on a turnkey basis. Currently, we operate several central heating and cooling plants/power and cogeneration facilities and provide maintenance services for high-voltage and boiler systems under multi-year contracts. In addition, we provide consulting and national program energy management services under multi-year agreements and energy efficiency system retrofits.

Our United Kingdom subsidiary also has a division that focuses on facilities services. This division currently provides a broad range of facilities services under multi-year agreements to public and private sector customers, including airlines, airports, real estate property managers, manufacturers and governmental agencies.

We believe that our electrical and mechanical construction services and facilities services operations are complementary, permitting us to offer customers a comprehensive package of services. Our ability to offer construction services and facilities services enhances our competitive position with customers. Furthermore, our revenues from our facilities services operations tend to be less cyclical than our construction operations because facilities services are more responsive to the needs of an industry’s operational requirements rather than its construction requirements.

Competition

We believe that the electrical and mechanical construction services business is highly fragmented and our competition includes thousands of small companies across the United States and around the world. We also compete with national, regional and local companies, many of which are small, owner-operated entities that carry on their businesses in a limited geographic area. However, there are a few United States based public companies focused on providing either electrical or mechanical construction services, such as Integrated Electrical Services, Inc. and Comfort Systems USA, Inc. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability and financial strength. Because we have total assets, annual revenues, net worth, access to bank credit and surety bonding and expertise significantly greater than most of our competitors, we believe we have a significant competitive advantage over our competitors in providing electrical and mechanical construction services. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure; (e) relationships with customers; (f) geographic diversity; (g) the ability to control project costs; (h) experience in specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital; (k) access to bank credit; and (l) price. However, there are relatively few significant barriers to entry to several types of our construction services business.

While the facilities services business is also highly fragmented with most competitors operating in a specific geographic region, a number of large United States based corporations such as Johnson Controls, Inc., Fluor Corp., UNICCO Service Company, the

Washington Division of URS Corporation, CB Richard Ellis, Inc., Jones Lang LaSalle and ABM Facility Services are engaged in this field, as are large original equipment manufacturers such as Carrier Corp. and Trane Air Conditioning. With respect to our industrial services operations, we are the leading North American provider of aftermarket maintenance and repair services, replacement parts and fabrication services for highly engineered shell and tube heat exchangers. The key competitive factors in the facilities services business include price, service, quality, technical expertise, geographic scope and the availability of qualified personnel and managers. Due to our size, both financial and geographic, and our technical capability and management experience, we believe we are in a strong competitive position in the facilities services business.

Employees

At December 31, 2010, we employed over 24,000 people, approximately 65% of whom are represented by various unions pursuant to more than 400 collective bargaining agreements between our individual subsidiaries and local unions. We believe that our employee relations are generally good. Only two of these collective bargaining agreements are national or regional in scope.

Backlog

We had backlog as of December 31, 2010 of approximately $3.42 billion, compared with backlog of approximately $3.15 billion as of December 31, 2009. Backlog increases with awards of new contracts and decreases as we perform work on existing contracts. Backlog is not a term recognized under United States generally accepted accounting principles; however, it is a common measurement used in our industry. Backlog includes unrecognized revenues to be realized from uncompleted construction contracts plus unrecognized revenues expected to be realized over the remaining term of the facilities services contracts. However, if the remaining term of a facilities services contract exceeds 12 months, the unrecognized revenues attributable to such contract included in backlog are limited to only the next 12 months of revenues.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC’s web site at http://www.sec.gov. You may also read and copy any document we file at the SEC’s public reference room located at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the public reference room.

Our Internet address is www.emcorgroup.com. We make available free of charge on or through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC.

Our Board of Directors has an audit committee, a compensation and personnel committee, and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, can be obtained free of charge from our web site, www.emcorgroup.com.

In addition, you may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.

References to the “Company,” “EMCOR,” “we,” “us,” “our” and words of similar import refer to EMCOR Group, Inc. and its consolidated subsidiaries unless the context indicates otherwise.

General

We are one of the largest electrical and mechanical construction and facilities services firms in the United States, Canada, the United Kingdom and in the world. In 2009, we had revenues of approximately $5.5 billion. We provide services to a broad range of commercial, industrial, utility and institutional customers through approximately 75 operating subsidiaries and joint venture entities. Our offices are located in the United States, Canada and the United Kingdom. In the Middle East, we carry on business through a joint venture. Our executive offices are located at 301 Merritt Seven, Norwalk, Connecticut 06851- 1092, and our telephone number at those offices is (203) 849-7800.

We specialize principally in providing construction services relating to electrical and mechanical systems in facilities of all types and in providing comprehensive services for the operation, maintenance and management of substantially all aspects of such facilities, commonly referred to as “facilities services.”

We design, integrate, install, start-up, operate and maintain various electrical and mechanical systems, including:

• Electric power transmission and distribution systems; • Premises electrical and lighting systems; • Low-voltage systems, such as fire alarm, security and process control systems; • Voice and data communications systems; • Roadway and transit lighting and fiber optic lines; • Heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; • Fire protection systems; • Plumbing, process and high-purity piping systems; • Water and wastewater treatment systems; and • Central plant heating and cooling systems.

Our facilities services businesses, which support the operation of a customer’s facilities, include:

• Industrial maintenance and services; • Outage services to utilities and industrial plants; • Commercial and government site-based operations and maintenance; • Military base operations support services; • Mobile maintenance and services; • Facilities management; • Installation and support for building systems; • Technical consulting and diagnostic services; • Small modification and retrofit projects; • Retrofit projects to comply with clean air laws; • Program development, management and maintenance for energy systems; and • Shop and on-site field services for refineries and petrochemical plants.

These facilities services are provided to a wide range of commercial, industrial, utility and institutional facilities, including those to which we also provide construction services and others to which construction services are provided by others. Our varied facilities services are frequently combined to provide integrated service packages, which include operations and maintenance, mobile mechanical services, energy management and facility improvement programs.

We provide construction services and facilities services directly to corporations, municipalities and other governmental entities, owners/developers, and tenants of buildings. We also provide these services indirectly by acting

as a subcontractor to general contractors, systems suppliers, property managers and other subcontractors. Worldwide, as of December 31, 2009, we had approximately 25,000 employees.

Our revenues are derived from many different customers in numerous industries, which have operations in several different geographical areas. Of our 2009 revenues, approximately 85% were generated in the United States and approximately 15% were generated internationally. In 2009, approximately 45% of revenues were derived from new construction projects, 21% were derived from renovation and retrofit of customer’s existing facilities, and 34% were derived from facilities services operations.

The broad scope of our operations is more particularly described below. For information regarding the revenues, operating income and total assets of each of our segments with respect to each of the last three fiscal years, and our revenues and assets attributable to the United States, Canada, the United Kingdom and all other foreign countries, see Note O—Segment Information of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data in this report.

Operations

The electrical and mechanical construction services industry has grown over the years due principally to the increased content, complexity and sophistication of electrical and mechanical systems, as well as the installation of more technologically advanced voice and data communications, lighting and environmental control systems in all types of facilities in large part due to the integration of digital processing and information technology in all types of projects. For these reasons, buildings need extensive electrical distribution systems. In addition, advanced voice and data communication systems require more sophisticated power supplies and extensive low-voltage and fiber-optic communications cabling. Moreover, the need for substantial environmental controls within a building, due to the heightened need for climate control to maintain extensive computer systems at optimal temperatures, and the demand for energy savings and environmental control in individual spaces have over the years expanded opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity.

Electrical and mechanical construction services primarily involve the design, integration, installation and start-up of: (a) electric power transmission and distribution systems, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems and related switch gear and controls; (b) premises electrical and lighting systems, including fixtures and controls; (c) low-voltage systems, such as fire alarm, security and process control systems; (d) voice and data communications systems, including fiber-optic and low-voltage cabling; (e) roadway and transit lighting and fiber-optic lines; (f) heating, ventilation, air conditioning, refrigeration and clean-room process ventilation systems; (g) fire protection systems; (h) plumbing, process and high-purity piping systems; (i) water and wastewater treatment systems; and (j) central plant heating and cooling systems.

Electrical and mechanical construction services generally fall into one of two categories: (a) large installation projects with contracts often in the multi-million dollar range that involve construction of industrial and commercial buildings and institutional and public works facilities or the fit-out of large blocks of space within commercial buildings and (b) smaller installation projects typically involving fit-out, renovation and retrofit work.

Our United States electrical and mechanical construction services operations accounted for about 56% of our 2009 revenues, of which revenues of approximately 67% were related to new construction and approximately 33% were related to renovation and retrofit projects. Our United Kingdom and Canada electrical and mechanical construction services operations accounted for approximately 10% of our 2009 revenues, of which revenues of approximately 72% were related to new construction and approximately 28% were related to renovation and retrofit projects. We provide electrical and mechanical construction services for both large and small installation and renovation projects. Our largest projects include those: (a) for institutional use (such as water and wastewater treatment facilities, hospitals, correctional facilities and research laboratories); (b) for industrial use (such as pharmaceutical plants, steel, pulp and paper mills, chemical, food, automotive and semiconductor manufacturing facilities and oil refineries); (c) for transportation projects (such as highways, airports and transit systems); (d) for commercial use (such as office buildings, data centers, hotels, casinos, convention centers, sports stadiums, shopping malls and resorts); and (e) for power generation and energy management projects. Our largest projects, which typically range in size from $10.0 million up to and occasionally exceeding $150.0 million and are frequently multi-year projects, represented about 37% of our construction services revenues in 2009.

Our projects of less than $10.0 million accounted for approximately 63% of our 2009 electrical and mechanical construction services revenues. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a

facility to accommodate a specific use. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, trading floors in financial services businesses, new production lines in manufacturing plants and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology or changes in the customer’s plant or office layout in the normal course of a customer’s business.

We have expanded our United States mechanical construction and facilities services operations through acquisitions of fire protection systems businesses in 2008 and 2007. In 2009, our fire protection systems businesses contributed over $175.0 million of revenues to our United States mechanical construction and facilities services segment.

We have a broad customer base with many long-standing relationships. We perform services pursuant to contracts with owners, such as corporations, municipalities and other governmental entities, general contractors, systems suppliers, construction managers, developers, other subcontractors and tenants of commercial properties. Institutional and public works projects are frequently long-term complex projects that require significant technical and management skills and the financial strength to obtain bid and performance bonds, which are often a condition to bidding for and winning these projects.

We also install and maintain lighting for streets, highways, bridges and tunnels, traffic signals, computerized traffic control systems, and signal and communication systems for mass transit systems in several metropolitan areas. In addition, in the United States, we manufacture and install sheet metal air handling systems for both our own mechanical construction operations and for unrelated mechanical contractors. We also maintain welding and pipe fabrication shops in support of some of our mechanical operations.

Our United States facilities services businesses provide facilities services to a wide range of commercial, industrial and institutional facilities, including both those for which we have provided construction services and those for which construction services were provided by others. Facilities services are frequently bundled to provide integrated service packages and are provided on a mobile basis or by our employees based at customer sites.

These facilities services, which generated approximately 34% of our 2009 revenues, are provided to owners, operators, tenants and managers of all types of facilities both on a contract basis for a specified period of time and on an individual task order basis. Of our 2009 facilities services revenues, approximately 86% were generated in the United States and approximately 14% were generated internationally.

Our facilities services operations have built on our traditional electrical and mechanical services operations, facilities services activities at our electrical and mechanical contracting subsidiaries, and our client relationships, as well as acquisitions, to expand the scope of services being offered and to develop packages of services for customers on a regional, national and global basis.

Our United States facilities services division offers a broad range of facilities services, including maintenance and service of electrical and mechanical systems, industrial maintenance and services, including outage services to utilities and industrial plants, commercial and government site-based operations and maintenance, military base operations support services, mobile maintenance and services, facilities management, installation and support for building systems, technical consulting and diagnostic services, small modification and retrofit projects, retrofit projects to comply with clean air laws, and program development, management and maintenance of energy systems.

Demand for our facilities services is driven by customers’ decisions to focus on their own core competencies, customers’ programs to reduce costs, the increasing technical complexity of their facilities and their mechanical, electrical, voice and data and other systems, and the need for increased reliability, especially in electrical and mechanical systems. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer’s core business. Our clients requiring facilities services include the federal government, utilities, independent power producers, refineries, pulp and paper producers and major corporations engaged in information technology, telecommunications, pharmaceuticals, petrochemicals, financial services, publishing and other manufacturing.

In Washington D.C., we provide facilities services at a number of preeminent buildings, including those that house the Secret Service, the Federal Deposit Insurance Corporation, the World Bank, the Department of Veteran Affairs, and the Department of Health and Human Services. We also provide facilities services to a number of military bases, including base operations support services to the Navy Capital Region, which, among other facilities, includes the Bethesda Naval Hospital, the Naval Research Laboratory and the Washington Navy Yard. We are also involved in joint ventures providing facilities services to the Navy, including one providing facilities services to the Naval Submarine Base in Bangor, Washington and the Naval Hospital in Bremerton, Washington. The agreements pursuant to which this

division provides services to the federal government are subject to renegotiation of terms and prices, termination by the government prior to the expiration of the term, and non-renewal.

In September 2007, we expanded our facilities services business in the industrial sector by acquiring FR X Ohmstede Acquisition Co. (“Ohmstede”). Headquartered in Beaumont, Texas, Ohmstede is the leading North American provider of aftermarket maintenance and repair services, replacement parts and fabrication services for highly engineered shell and tube heat exchangers for refineries and the petrochemical industry. Through Ohmstede, we provide in-shop repairs and customized design and manufacturing for heat exchangers as well as related equipment at five facilities on the U.S. Gulf Coast and at a facility in the Los Angeles, California area and provide cleaning services for heat exchangers at one of our Texas facilities. In addition, we provide aftermarket maintenance of shell and tube heat exchangers in the field. These services are tailored to meet customer needs for scheduled turnarounds or specialty callout service. We also have embedded multi-year contracts with refineries pursuant to which our crews and equipment are located at customers’ plants, allowing our employees to perform specialty services for heat exchangers and related equipment on a daily basis.

We currently provide facilities services in a majority of the states in the United States and as part of our operations are responsible for: (a) the oversight of all or most of the facilities operations of a business, including operation and maintenance; (b) the oversight of logistical processes; (c) servicing, upgrade and retrofit of HVAC, electrical, plumbing and industrial piping and sheet metal systems in existing facilities; (d) diagnostic and solution engineering for building systems and their components; (e) maintenance and support services to manufacturers and power producers; and (f) shop and on-site field services for refineries and petrochemical plants.

Our energy services business, which is part of our facilities services segment, designs, constructs and operates energy related projects and facilities on a turnkey basis. Currently, we operate several central heating and cooling plants/power and cogeneration facilities and provide maintenance services for high- voltage and boiler systems under multi-year contracts. In addition, we provide consulting and national program energy management services under multi-year agreements and energy efficiency system retrofits. Our energy services business’ recent projects include: (a) engineering, procurement and construction of a process landfill gas blending system and chilled water plant for the University of New Hampshire; (b) construction of multi-megawatt cogeneration plants for Ortho-McNeil Pharmaceutical, the University of New Hampshire and Plumas-Sierra Rural Electric Cooperative; (c) provision of evaluation, engineering, project development, and construction management services for the San Francisco Public Utilities Commission, Pacific Gas & Electric Company and Southern California Edison for self generation and alternative generation projects and a wide range of conservation and efficiency projects; and (d) multi-trade maintenance agreements for Evergreen Packaging, Georgia Pacific and Continental Tire. Over the past five years, we have also completed a number of energy related projects, including engineering, procurement and construction of two renewable energy facilities to process landfill gas into pipeline quality natural gas and construction of various multi-megawatt cogeneration plants.

Our United Kingdom subsidiary also has a division that focuses on facilities services. This division currently provides a number of facilities services to public and private sector customers under multi-year agreements.

We believe that our electrical and mechanical construction services and facilities services activities are complementary, permitting us to offer customers a comprehensive package of services. Our ability to offer construction services and facilities services enhances our competitive position with customers. Furthermore, our revenues from our facilities services operations tend to be less cyclical than our construction operations because facilities services are more responsive to the needs of an industry’s operational requirements rather than its construction requirements.

Competition

We believe that the electrical and mechanical construction services business is highly fragmented and our competition includes thousands of small companies across the United States and around the world. We also compete with national, regional and local companies, many of which are small, owner-operated entities that operate in a limited geographic area. However, there are a few public companies focused on providing either electrical or mechanical construction services, such as Integrated Electrical Services, Inc. and Comfort Systems USA, Inc. A majority of our revenues are derived from projects requiring competitive bids; however, an invitation to bid is often conditioned upon prior experience, technical capability and financial strength. Because we have total assets, annual revenues, net worth, access to bank credit and surety bonding and expertise significantly greater than most of our competitors, we believe we have a significant competitive advantage over our competitors in providing electrical and mechanical construction services. Competitive factors in the electrical and mechanical construction services business include: (a) the availability of qualified and/or licensed personnel; (b) reputation for integrity and quality; (c) safety record; (d) cost structure; (e) relationships with customers; (f) geographic diversity; (g) the ability to control project costs; (h) experience in

specialized markets; (i) the ability to obtain surety bonding; (j) adequate working capital; and (k) access to bank credit. However, there are relatively few significant barriers to entry to several types of our construction services business.

While the facilities services business is also highly fragmented with most competitors operating in a specific geographic region, a number of large corporations such as Johnson Controls, Inc., Fluor Corp., UNICCO Service Company, the Washington Division of URS Corporation, CB Richard Ellis, Inc., Jones Lang LaSalle, ABM Facility Services and Linc Facility Services, LLC are engaged in this field, as are large original equipment manufacturers such as Carrier Corp. and Trane Air Conditioning. With respect to our industrial services operations, we are the leading North American provider of aftermarket maintenance and repair services, replacement parts and fabrication services for highly engineered shell and tube heat exchangers. The key competitive factors in the facilities services business include price, service, quality, technical expertise, geographic scope and the availability of qualified personnel and managers. Due to our size, both financial and geographic, and our technical capability and management experience, we believe we are in a strong competitive position in the facilities services business.

Employees

At December 31, 2009, we employed approximately 25,000 people, approximately 64% of whom are represented by various unions pursuant to more than 375 collective bargaining agreements between our individual subsidiaries and local unions. We believe that our employee relations are generally good. Only one of these collective bargaining agreements is national or regional in scope.

Backlog

We had backlog as of December 31, 2009 of approximately $3.15 billion, compared with backlog of approximately $4.00 billion as of December 31, 2008. Backlog decreases as we perform work on existing contracts and increases with awards of new contracts. Backlog is not a term recognized under United States generally accepted accounting principles; however, it is a common measurement used in our industry. Backlog includes unrecognized revenues to be realized from uncompleted construction contracts plus unrecognized revenues expected to be realized over the remaining term of the facilities services contracts. However, if the remaining term of a facilities services contract exceeds 12 months, the unrecognized revenues attributable to such contract included in backlog are limited to only the next 12 months of revenues.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, which we refer to as the “SEC”. These filings are available to the public over the internet at the SEC’s web site at http://www.sec.gov. You may also read and copy any document we file at the SEC’s public reference room located at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the public reference room.

Our Internet address is www.emcorgroup.com. We make available free of charge on or through www.emcorgroup.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC.

Our Board of Directors has an audit committee, a compensation and personnel committee and a nominating and corporate governance committee. Each of these committees has a formal charter. We also have Corporate Governance Guidelines, which include guidelines regarding related party transactions, a Code of Ethics for our Chief Executive Officer and Senior Financial Officers, and a Code of Ethics and Business Conduct for Directors, Officers and Employees. Copies of these charters, guidelines and codes, and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, can be obtained free of charge from our web site, www.emcorgroup.com.

In addition, you may request a copy of the foregoing filings (excluding exhibits), charters, guidelines and codes and any waivers or amendments to such codes which are applicable to our executive officers, senior financial officers or directors, at no cost by writing to us at EMCOR Group, Inc., 301 Merritt Seven, Norwalk, CT 06851-1092, Attention: Corporate Secretary, or by telephoning us at (203) 849-7800.