U.S. Ecology, Inc., through its subsidiaries, provides radioactive, hazardous, polychlorinated biphenyls, and non-hazardous industrial waste management and recycling services in the United States. The company accepts hazardous, polychlorinated biphenyls, industrial and low-level radioactive waste, naturally occurring and accelerator produced radioactive materials, and low-activity radioactive materials, as well as provides waste treatment and disposal facility services. It offers its services to commercial and government entities, such as refineries and chemical production facilities, electric utilities, manufacturers, steel mills, and medical and academic institutions. The company was formerly known as American Ecology Corporation and changed its name to U.S. Ecology, Inc. in February 2010. U.S. Ecology, Inc. was founded in 1952 and is headquartered in Boise, Idaho.

SNEF has grown into a powerful business. Founded in 1905, the company (known as Groupe SNEF) specializes in climate control (HVAC), communications systems, electrical engineering, industrial processes, and security systems. Its customers include large firms, government agencies, and building administrators. Groupe SNEF works from about 100 offices in France and through more than a dozen international subsidiaries, mostly in Europe and Africa. The firm works on more than 40,000 projects a year. Among its most notable: Op�ra de Lyon; the Charles de Gaulle aircraft carrier; and the national stadium, Stade de France.

Hunt Construction Group specializes in fields of dreams. A subsidiary of The Hunt Corporation, it is a leading builder of sports complexes, including the Louisiana Superdome in New Orleans, the Great American Ballpark for The Cincinnati Reds, and Citi Field for the New York Mets. It has strategic alliances with other construction firms such as Bovis Lend Lease for sports projects. It also works on aviation facilities (a UPS service hub), high tech centers (IBM chip facility), office buildings, hospitals, hotels, industrial facilities, and universities. The company completes about $7 billion in work each year. It was founded in 1944 as Huber, Hunt & Nichols. It is under its third generation of Hunt leadership.

Pernix Group (formerly Telesource International) provides engineering and construction services and operates independent power generation projects in the Pacific region and in the US. The group offers project development and management, specialized construction and engineering, and utility and plant operations. It also brokers goods and services. While its previous focus had been on Fiji and other islands in the Pacific, Pernix Group has shifted its business model to emphasize offering construction services and working on power plant projects in North America. Kuwait-based civil, electrical, and mechanical group Sayed Hamid Behbehani & Sons controls 97% of the company.

Sargent Electric Company has earned its stripes providing electrical services for its customers. Founded in 1907 to serve Pittsburgh's steel industry, the electrical contractor performs construction work for utilities, foundries, oil refineries, chemical processing firms, and steelmakers. Clients have included Allegheny Energy, Duquesne Light, General Electric, and United States Steel. The company also provides electric service and maintenance services to residential, commercial, and government customers. Its service area encompasses about 20 states in the eastern half of the US. Sargent Electric is owned and managed by the Sargent family.

Dycom Industries for construction and engineering assistance. Operating through more than 30 subsidiaries, the company primarily designs, builds, and maintains coaxial, copper, and fiber-optic cable systems for local and long-distance phone companies and cable television operators. Dycom also provides wiring services for businesses and government agencies, installs and maintains electrical lines for utilities, and locates underground wires and pipelines for excavators. Dycom's operating subsidiaries are located in 18 states and Alberta, Canada. AT&T, Comcast, and Verizon Communications are its top customers, together accounting for nearly half of sales.

F.A. Wilhelm Construction Company, Inc. provides construction and construction management in the Midwest, particularly in its home state of Indiana. The firm focuses on commercial, industrial, and institutional buildings for the health care, research, and education sectors. It also owns fabrication facilties that produce concrete formwork, process piping, sheet metal, and structural steel. F.A. Wilhelm is a subsidiary of Wilhelm Construction, which also operates mechanical contractor Freitag-Weinhardt and sheet metal contractor Poynter Sheet Metal. The group began in 1923 as a masonry contractor.

Component Assembly Systems (CAS) has assembled the components of its success as a specialty contractor. Founded in 1964, the company works on such commercial and institutional projects as hotels, offices, government facilities, apartments, hospitals, airports, and entertainment venues. It specializes in drywall construction, millwork, and carpentry, as well as niche areas such as architectural detailing, acoustical contracting, and specialty ceilings. The company primarily serves Eastern seaboard clients, but also offers its services throughout the US and internationally; in the western US, it operates as Component West. CAS operates from offices in Boston, Las Vegas, New Jersey, New York, and Washington, DC.

Sidney Cubbage provides a variety of building engineering services, primarily air conditioning, heating, plumbing, refrigeration, and ventilation. Subsidiary Thames Ducting makes and installs ventilation ductwork. Sidney Cubbage's handiwork is most often found in hospitals, leisure centers, schools, and office buildings. Alfred McAlpine, Krispy Kreme, University of Reading, and various county councils are counted among the firm's clients. Sidney Cubbage founded his eponymous firm in 1927; semi-retired chairman Paul Remsbury bought the company along with Rod Harris in 1971.

Portage Environmental helps carry the load for customers needing environmental engineering services. The firm's offerings include environmental remediation, process and project engineering, and decontamination and decommissioning services. Portage Environmental counts US government agencies (such as the Department of Defense and the Department of Energy) and Native American tribes among its clients, and has conducted projects in 20 US states, as well as in Afghanistan, Guam, Iraq, Japan, Kuwait, Qatar, and South Korea. The firm operates from some two dozen offices throughout the US. President and CEO Michael Spry helped found Portage Environmental in 1992.

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