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.

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

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.

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

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.

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.

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

AECOM, together with its subsidiaries, provides professional infrastructure consulting services for governments, businesses, and organizations in the Americas, Europe, the Middle East, Africa, and the Asia Pacific.

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