EMCOR Group
Corporate brand
UnclaimedA major U.S. provider of mechanical and electrical construction, engineering, industrial infrastructure, and facilities services.
Last updated October 14, 2026
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Overview
EMCOR Group is an engineering, construction, and facilities-services company headquartered in Norwalk, Connecticut. Through a large network of operating subsidiaries and locations, it delivers mechanical and electrical construction, engineering, industrial infrastructure, energy infrastructure, facilities management, and building services. Its customers are primarily commercial, industrial, institutional, and government organizations. The company works on technically demanding facilities and infrastructure, including data centers, fiber and communications installations, semiconductor plants, biotechnology and pharmaceutical facilities, life-sciences buildings, food-processing operations, power-generation projects, oil refineries, petrochemical facilities, and public-sector buildings. Its work can cover design assistance, project delivery, installation, commissioning, operation, maintenance, and modernization rather than only the physical construction phase. EMCOR's electrical and mechanical construction activities are its largest operating area. In 2024, this division accounted for approximately 67% of company revenue according to the referenced company description. Projects include power and energy infrastructure, photovoltaic installations, industrial and process systems, road lighting, traffic-control systems, data-center construction, fiber and cabling work, and specialized facilities for advanced manufacturing and life sciences. Building services represented approximately 24% of 2024 revenue in the same reference material. This business maintains and improves building systems such as heating, ventilation and air conditioning, plumbing, fire protection, building automation, energy systems, and indoor-air-quality infrastructure. EMCOR also provides government facilities services through EMCOR Government Services. Referenced public-sector customers and sites include agencies and facilities associated with the National Archives and Records Administration, the Federal Deposit Insurance Corporation, NASA's Jet Propulsion Laboratory, the Departments of Transportation, Education, Health and Human Services, Energy, Defense, and Homeland Security, the Government Accountability Office, and the John Joseph Moakley United States Courthouse. Industrial services accounted for approximately 9% of 2024 revenue in the reference material. This activity includes maintenance and project work for refineries and petrochemical-processing facilities, together with emerging work involving sustainable energy and carbon capture and storage. The combination of construction, maintenance, and recurring facilities services gives EMCOR exposure to both project-based demand and longer-term operating requirements. The modern company was shaped by a major restructuring in the 1990s. Jamaica Water Properties had accumulated substantial debt after acquisitions outside its core business and filed for bankruptcy in 1994. Frank MacInnis became chief executive, divested many non-core operations, renamed the remaining business EMCOR, and expanded into facilities management to create a steadier service component. The restructuring was completed in December 1994, and the company subsequently reported 27 consecutive quarters of year-over-year revenue growth by 2001. MacInnis retired as chief executive in January 2011 and later stepped down as chairman in 2015. EMCOR remains focused mainly on the United States and is recognized as one of the country's largest specialty engineering and construction contractors. The referenced material describes more than 100 operating subsidiaries and approximately 180 locations. It also identifies EMCOR as a Fortune 500 company and reports that Engineering News-Record ranked it second among the top 600 specialty contractors by revenue in 2025. In December 2025, EMCOR sold its United Kingdom operations to OCS Group for £190 million, a transaction that reduced the scope of its international operations while reinforcing its predominantly U.S.-centered profile.
History
EMCOR's corporate history is closely connected with the restructuring of Jamaica Water Properties in the early 1990s. Jamaica Water Properties had expanded beyond its core activities through acquisitions and took on significant debt. The company filed for bankruptcy in 1994. Frank MacInnis became chief executive during this period and led a program to sell many of the acquired and non-core businesses. The remaining business was renamed EMCOR. Under the new direction, the company concentrated more heavily on engineering, construction, building systems, and related technical services. It also added facilities-management capabilities. This broadened the business beyond one-time construction projects and gave it a service activity based on the ongoing operation, maintenance, and improvement of customer facilities. The restructuring was completed in December 1994. The company subsequently pursued growth through operating subsidiaries and expansion across specialized mechanical, electrical, industrial, and building-services markets. Its project portfolio developed around complex environments where customers require technical expertise, regulatory compliance, safety management, and continuity of operations. These environments include industrial plants, refineries, data centers, advanced manufacturing sites, laboratories, healthcare and life-sciences facilities, public buildings, and government installations. By 2001, the company was reported to have achieved 27 consecutive quarters of year-over-year revenue growth following the restructuring. EMCOR's operating model combined local and regional subsidiaries with a group-level platform, allowing it to serve diverse markets while retaining specialized capabilities in construction and maintenance. Over time, its scope came to include electrical and mechanical construction, engineering, energy infrastructure, industrial services, facilities management, and building-services maintenance. Frank MacInnis retired as chief executive in January 2011 and left the chairmanship in 2015. The company continued as a public specialty-contractor group with a predominantly U.S. customer base. Its work expanded in areas linked to data-center capacity, fiber and communications infrastructure, semiconductor manufacturing, biotechnology, pharmaceuticals, renewable-energy installations, and government facilities. The company also maintained industrial relationships involving refineries and petrochemical-processing assets. The referenced company description states that EMCOR has more than 100 operating subsidiaries and approximately 180 locations. It identifies the United States as the center of the business, while the group historically also operated in the United Kingdom and Canada. In 2025, Engineering News-Record ranked EMCOR second among the top 600 specialty contractors by revenue. In December of that year, EMCOR sold its United Kingdom operations to OCS Group for £190 million. This marked a significant portfolio decision and further emphasized the company's U.S.-oriented operating profile.
- 2025
United Kingdom operations sold
[1]EMCOR sold its United Kingdom operations to OCS Group for a reported £190 million.
- 2015
MacInnis leaves chairmanship
[1]Frank MacInnis stepped down as chairman in 2015.
- 2011
MacInnis retires as chief executive
[1]Frank MacInnis retired from the chief executive role in January 2011.
- 2001
Sustained post-restructuring growth reported
[1]The company was reported to have achieved 27 consecutive quarters of year-over-year revenue growth after completing its restructuring.
- 1994
Bankruptcy and corporate restructuring
[1]Jamaica Water Properties filed for bankruptcy after debt-heavy, non-core acquisitions. Frank MacInnis became chief executive, divested businesses, and renamed the remaining company EMCOR.
- 1977
Company founded
[1]The company is identified in the supplied dossier as having been founded in 1977.
Products and positioning
A large, diversified specialty contractor and technical facilities-services provider serving complex commercial, industrial, institutional, and government environments.
Construction and engineering
Mechanical and electrical construction
EMCOR's largest business area delivers mechanical and electrical construction and related engineering for complex facilities and infrastructure. Work includes power stations, photovoltaic systems, food-processing facilities, road lighting, traffic-control systems, data centers, fiber networks, cabling, semiconductor plants, biotechnology sites, life-sciences facilities, and pharmaceutical operations. Services can span design support, installation, commissioning, and project execution.
Facilities services
Building services
Building-services operations maintain and improve the systems that keep commercial, institutional, industrial, and government buildings functional. Capabilities include HVAC, plumbing, fire protection, building automation, energy management, and indoor-air-quality services. The offering supports recurring maintenance as well as upgrades and modernization projects.
Industrial maintenance
Industrial services
Industrial services support refineries, petrochemical-processing plants, and other heavy industrial facilities. The work includes maintenance and project services intended to support plant reliability and continued operation. The business also participates in projects associated with sustainable energy and carbon capture and storage.
Government services
Government facilities services
Through EMCOR Government Services, the group provides facilities-related work for U.S. government agencies and public buildings. Referenced customers and sites include NASA's Jet Propulsion Laboratory, the National Archives and Records Administration, the Federal Deposit Insurance Corporation, multiple cabinet departments, the Government Accountability Office, and a federal courthouse.
Brand decisions
2025
Sell United Kingdom operationsM&ABackground
EMCOR reviewed the scope of its international operations while maintaining a predominantly U.S.-focused business.
Action taken
The company sold its United Kingdom operations to OCS Group for £190 million.
Aftermath
The transaction reduced EMCOR's direct United Kingdom footprint and reinforced its North American-centered profile.
Reported transaction value. £190 million (2025)
1994
Refocus the business after bankruptcyStrategyBackground
Jamaica Water Properties had accumulated substantial debt through acquisitions outside its core business and entered bankruptcy proceedings.
Action taken
Under Frank MacInnis, the company sold many non-core operations, renamed the remaining business EMCOR, and added facilities-management services.
Aftermath
The restructuring was completed in December 1994, followed by a reported period of 27 consecutive quarters of year-over-year revenue growth by 2001.
Recent events
Reported
EMCOR Group raises 2026 guidance[3]
EMCOR Group revised its full-year 2026 non-GAAP diluted EPS and revenue guidance ranges upward.
Reported
EMCOR Group reports third-quarter 2026 results[3]
EMCOR Group reported third-quarter net income of $399.9 million, non-GAAP diluted EPS of $9.60, and revenue of $5.54 billion.
Reported
EMCOR completes acquisition of Batchelor & Kimball[4]
EMCOR Group announced that it had completed its acquisition of Batchelor & Kimball, a provider of mechanical construction and maintenance services.
EMCOR completes acquisition of Batchelor & Kimball[5]
EMCOR Group announced that it completed its acquisition of Batchelor & Kimball, a provider of mechanical construction and maintenance services.
Sources5 sources
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