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.

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.

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.

Concrete Pumping Holdings, Inc. provides concrete pumping and waste management services in the United States and the United Kingdom. The company offers concrete pumping services to general contractors and concrete finishing companies in the commercial, infrastructure, and residential sectors under the Brundage-Bone and Camfaud brands; and industrial cleanup and containment services primarily to customers in the construction industry under the Eco-Pan brand.

Limbach Holdings, Inc. operates as an integrated building systems solutions company in the United States. It operates in two segments, General Contractor Relationships and Owner Direct Relationships.

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.