EMCOR Group, Inc., headquartered in Norwalk, Connecticut, provides mechanical and electrical construction, industrial and energy infrastructure, and building services in the United States. It has over 100 operating subsidiaries and approximately 180 locations. The company is ranked 300th on the Fortune 500. In 2025, the company was ranked 2nd by Engineering News-Record on its list of the top 600 specialty contractors by revenue. The company's electrical and mechanical construction services division, representing 67% of revenues in 2024, provides construction and operation services for infrastructure such as power stations, including those that provide sustainable energy such as photovoltaic systems; food processing; road lighting and traffic control systems, and other heavy construction projects. Large projects in this division relate to data centers, data and fiber projects, and cabling, as well as semiconductor, biotech, life sciences, and pharmaceutical facilities. The company's building services division, which represented 24% of revenues in 2024, maintains mechanical systems such as HVAC, plumbing, fire safety, automation, energy, and air quality. Wikipedia