EMCOR Group, Inc., headquartered in Norwalk, Connecticut, provides mechanical and electrical construction, industrial and energy infrastructure, and building services in the United States and the United Kingdom. It has over 100 operating subsidiaries and approximately 180 locations. The company is ranked 324th on the Fortune 500. In 2023, the company was ranked 2nd by Engineering News-Record on its list of the top 600 specialty contractors. The company's electrical and mechanical construction services division, representing 63% of revenues in 2023, provides construction and operation services for data centers; power stations, including those that provide nuclear power and sustainable energy; road lighting and traffic control systems, and other heavy construction projects. The company's building services division, which represented 28% of revenues in 2023, maintains mechanical systems such as HVAC, plumbing, fire safety, automation, energy, and air quality. Wikipedia