EMCOR Group, Inc. is an electrical and mechanical construction, and facilities services firm in the United States. The Company provides building services and industrial services. Its segments are 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. As of December 31, 2016, its services were provided to a range of commercial, industrial, utility and institutional customers through approximately 75 operating subsidiaries and joint venture entities. It is providing construction services relating to electrical and mechanical systems in various types of non-residential and certain residential facilities, and in providing services relating to the operation, maintenance and management of facilities, including refineries and petrochemical plants. It operates various electrical and mechanical systems.