EMCOR Group, Inc. provides electrical and mechanical construction, and facilities services primarily in the United States and the United Kingdom. It offers design, integration, installation, starts-up, operation, and maintenance services related to electrical power transmission, distribution, and generation systems; energy solutions; premises electrical and lighting systems; 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 systems; roadway and transit lighting, signaling, and fiber optic lines; heating, ventilation, air conditioning, refrigeration, and 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.

MYR Group Inc., through its subsidiaries, provides electrical construction services in the United States and Canada. It operates in two segments, Transmission and Distribution, and Commercial and Industrial.

TopBuild Corp., together with its subsidiaries, engages in the installation and distribution of insulation and other building products to the construction industry.

APi Group Corporation provides safety, specialty, and industrial services in North America, Europe, Australia, and the Asian-Pacific. It operates through three segments: Safety Services, Specialty Services, and Industrial Services.

Quanta Services, Inc. provides specialty contracting services worldwide. The Electric Power Infrastructure Solutions segment engages in the design, procurement, construction, upgrade, repair, and maintenance of electric power transmission and distribution infrastructure and substation facilities; energized installation, maintenance, and upgrade of electric power infrastructure projects; installation of smart grid technologies on electric power networks; and design, installation, maintenance, and repair of commercial and industrial wirings.

Comfort Systems USA, Inc. provides mechanical and electrical installation, renovation, maintenance, repair, and replacement services for the mechanical and electrical services industry in the United States.

Granite Construction Incorporated operates as an infrastructure contractor and a construction materials producer in the United States. It operates through two segments, Construction and Materials segments.

MasTec, Inc., an infrastructure construction company, provides engineering, building, installation, maintenance, and upgrade services for communications, energy, utility, and other infrastructure primarily in the United States and Canada.

Construction Partners, Inc., a civil infrastructure company, engages in the construction and maintenance of roadways across Alabama, Florida, Georgia, North Carolina, and South Carolina.

Matrix Service Company provides engineering, fabrication, infrastructure, construction, and maintenance services primarily to the oil, gas, power, petrochemical, industrial, agricultural, mining, and minerals markets in the United States, Canada, South Korea, Australia, and internationally.

Primoris Services Corporation, a specialty contractor company, provides a range of construction, fabrication, maintenance, replacement, and engineering services in the United States and Canada.

Jacobs Engineering Group Inc. provides consulting, technical, scientific, and project delivery services for the government and private sectors in the United States, Europe, Canada, India, rest of Asia, Australia, New Zealand, South America, Mexico, the Middle East, and Africa.