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.

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.

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.

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.

Great Lakes Dredge & Dock Corporation provides dredging services in the United States. The company engages in capital dredging that consists of port expansion projects; coastal restoration and land reclamations; trench digging for pipelines, tunnels, and cables; and other dredging related to the construction of breakwaters, jetties, canals, and other marine structures.

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.

Dycom Industries, Inc. provides specialty contracting services in the United States. The company offers program management and engineering services; plans and designs aerial, underground, and buried fiber optic, copper, and coaxial cable systems; and construction, maintenance, and installation services, such as placement and splicing of fiber, copper, and coaxial cables to telecommunications providers.

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.

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

Sterling Infrastructure, Inc. engages in the transportation, e-infrastructure, and building solutions primarily in the Southern United States, the Northeastern and Mid-Atlantic United States, the Rocky Mountain states, California, and Hawaii.