W.W. Gay Mechanical Contractor provides a variety of commercial and industrial contracting services. These include HVAC (heating, ventilation, and air conditioning) services, plumbing, piping, carpentry, welding, general construction, fire protection, and concrete work. The company also offers used equipment for sale when available. The firm operates through offices in Daytona Beach, Gainesville, Jacksonville, St. Augustine, and Orlando, Florida and in Little Rock, Arkansas. CEO William W. "Bill" Gay founded the company in 1962.

Casella Waste Systems, Inc. provides resource management services, primarily in the areas of solid waste collection, transfer, disposal, and recycling services to the residential, commercial, municipal, and industrial customers in the United States. It offers non-hazardous solid waste services, including collection operations, transfer stations, material recycling facilities, and disposal facilities. The company also markets recyclable metals, aluminum, plastics, and paper and corrugated cardboard, which have been processed at its facilities; and recyclables purchased from third parties. In addition, it generates and sells electricity under a contract at a waste-to-energy facility. The company has operations in Vermont, New Hampshire, New York, Massachusetts, Maine, Connecticut, Pennsylvania, New Jersey, North Carolina, Tennessee, Georgia, Florida, Michigan, and Wisconsin. It has a 50% joint venture with US GreenFiber LLC to manufacture, market, and sell cellulose insulation, which is used in residential dwellings and manufactured housings. As of August 31, 2010, the company owned and/or operated 31 solid waste collection operations, 30 transfer stations, 34 recycling facilities, 8 subtitle D landfills, and 1 landfill permitted to accept construction and demolition materials, as well as 1 waste-to-energy facility. Casella Waste Systems, Inc. was founded in 1975 and is based in Rutland, Vermont.

Andersen Construction Company focuses on commercial and industrial construction in the Western US. The group, which introduced concrete tilt-up construction to the Pacific Northwest, builds everything from parking structures to medical facilities, manufacturing plants, and industrial complexes. It also works on institutional projects for the government and education markets. Other projects include tenant improvements, seismic upgrades, and remediation construction. The company provides construction management (which accounts for 80% of its work), as well as general contracting and design/build delivery. It also offers startup and commissioning services. Chairman and CEO Andy Andersen founded the company in 1950.

Rea Contracting, LLC,founded in 1937, the company (formerly Rea Construction Company) was sold by bankrupt J.A. Jones to Lane Construction in 2003. Rea Contracting is a leading builder of bridges and highways in the eastern US (mainly in North and South Carolina). Its public division handles highways and other public works projects. Rea's commercial division provides paving for businesses, apartments, retailers, and other commercial clients. The structures division builds bridges, retaining walls, and dams. The company also operates hot mix asphalt plants in the Carolinas.

Tecta America is one of the nation's largest commercial roofing companies. It provides roof installation, replacement, maintenance, repair, and restoration services for commercial, institutional, retail, and industrial clients. Tecta often provides roofing services for federal, state, and local agencies and has worked on the White House and Guam Air Force Base. The company's environmental solutions division offers eco-friendly roof systems, solar tracking skylights, cool roof coatings, and solar roof panels. KRG Capital Partners owns Tecta.

HDR has left its mark on the US. HDR is an architecture, engineering, and consulting firm that specializes in projects including bridges, water- and wastewater-treatment plants, and hospitals. HDR also provides mechanical and plumbing services, construction and project management, and utilities planning. The group has completed projects throughout the US and in some 60 countries abroad and has more than 185 locations around the world. The employee-owned company was founded as Henningson Engineering in 1917 to build municipal plants in the rural Midwest.

Lakeside Industries is one of the largest highway contractors in the Pacific Northwest. A leading asphalt paving contractor and manufacturer, Lakeside Industries works on municipal, commercial, and industrial sites, as well as residential projects. It also sells hot-mix and cold asphalt to other paving contractors. It has about a dozen offices in western Washington, northwestern Oregon, and central Idaho. Owned by the founding Lee family, Lakeside Industries was established when the family combined their mining, sand and gravel, asphalt, and trucking businesses in 1972.

Wolfberg Alvarez & Partners wants to be responsible for some cool, cool, cool buildings there. The architecture and engineering firm offers multi-disciplined design services, including planning, programming, and pre-design services; interior planning and design; architectural and engineering design; energy management; and construction services. The firm serves public- and private-sector clients; projects have included work on the Miami International Airport a NASA operations support center, and historical restoration at art museum Villa Vizcaya. President Julio Alvarez and vice chairman David Wolfberg founded the firm in 1976.

STV Group helps create the systems through which SUVs, LRVs, and 747s can travel. Its subsidiaries provide architectural, engineering, environmental, construction management, interior design, and planning services for infrastructure projects include airports, light-rail systems, ports, and railroads. Its security division, established in 2008, conducts threat assessments and mitigates safety strategies for facilities. The group serves public and private clients around the world, but primarily in the US. The employee-owned STV Group was founded in 1912 and taken private in 2001.

Guarantee Electrical has been powering up St. Louis since it "guaranteed" to electrify the World's Fair in 1904. (It delivered on the guarantee). Now a major US electrical contractor, the company offers commercial, institutional, and industrial services including construction, design/build, communications/data, and maintenance. Guarantee Electrical operates throughout the country and has worked on such varied projects as the MGM Grand in Las Vegas and several post office and prison facilities. Its GECO Systems division installs and services intercom, closed-circuit television, and other audio-visual systems. The Oertli family owns and operates the firm.

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