KBR, Inc. provides scientific, technology, and engineering solutions to governments and commercial customers worldwide. The company operates through Government Solutions and Sustainable Technology Solutions segments.

Fluor Corporation provides engineering, procurement, and construction (EPC); fabrication and modularization; operation and maintenance; asset integrity; and project management services worldwide.

Tetra Tech, Inc. provides consulting and engineering services worldwide. The company operates through two segments Government Services Group (GSG) and Commercial/International Services Group (CIG).

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.

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.

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.

Stantec Inc. provides engineering, architecture, and environmental consulting services in the areas of infrastructure and facilities in Canada, the United States, and internationally.

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.

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.

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.

Tutor Perini Corporation, a construction company, provides diversified general contracting, construction management, and design-build services to private customers and public agencies worldwide.

Arcosa, Inc., together with its subsidiaries, provides infrastructure-related products and solutions for the construction, energy, and transportation markets in North America.

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.