Holder Construction's goal is to hold onto its clients' business. Boasting an 80% repeat customer rate, the firm provides commercial construction services, including computer modeling, planning and design, commissioning, mechanical, electrical, and plumbing support, safety inspections and training, and environmental assessment. Holder Construction serves as a general contractor, construction manager, and designer/builder on a variety of projects, from corporate offices and data technology centers to hotels and schools. Clients have included Mellon Financial, UPS, Emory University, and American Cancer Society. Privately-held Holder Construction is led by chairman and CEO Thomas Holder.

Severfield-Rowen Plc is a holding company for a specialist engineering group of companies that design, manufacture, and erect structural steelwork throughout the UK. Its operating subsidiaries include Severfield-Reeve Structures and Rowen Structures. The company operates the largest single production facility for the fabrication of structural steelwork in the UK. Besides fabrication and building subsidiaries, the company also provides project management of building and overseas contracts, property portfolio management, and steel trading services. One of its largest projects to date is its work on Heathrow's Terminal 5, involving 65,000 tons of steel. It is also providing steelwork for a Rolls-Royce factory.

Reserve Industries mines and processes silica sand from its open pit mines outside Seattle, Washington. The company's wet sand products are marketed for construction materials and are used to make sand traps on golf courses. The company's dried silica sand is sold to manufacturers of glass containers. Reserve Industries also operates an all-weather dumpsite near Ravensdale, Washington, that accepts clean fill, paving materials such as concrete and ground asphalt, topsoil with strippings, and items with no petroleum or heavy-metal contaminates. Reserve Industries Corporation sold its Rossborough subsidiary in 2006 to Opta Minerals, a division of SunOpta Inc.

Biffa, one of the UK's leading waste management companies, it offers collection (curbside, light commercial, hazardous/special waste), landfill, groundwater and soil treatment, and industrial cleaning services. Its operations include more than 1,500 collection and transportation vehicles to handle its curbside and manufacturing, pharmaceutical, medical, petroleum, chemical, and electronics industry customers. Biffa has about 75,000 customers. It operates more than 30 landfills in the UK. It also is a provider of renewable energy with 109 MW of installed capacity. Biffa was taken private in 2008 by a group of private investors led by Global Infrastructure Partners.

Zone Mechanical is in the HVAC zone. The company offers heating, air-conditioning, refrigeration, and other services to customers in the Chicago area and in northwestern Indiana on a 24-hour-a-day basis. The company, which was formed in 2001, distributes, installs, and services products manufactured by Tyler Refrigeration Corporation and other companies. In 2004 Zone Mechanical ranked 57th in Entrepreneur magazine's "Hot 100" list of the fastest-growing new entrepreneurial businesses in America. The firm is owned by co-presidents Dan Palubiak and Frank Petrosino.

P.J. Dick is the contracting arm in a family of companies that also includes Trumbull Corporation and Lindy Paving. P.J. Dick builds mostly commercial, industrial, and federal projects such as labs, parking structures, military buildings, and sports facilities. Trumbull Corporation specializes in heavy and highway construction, building roads, dams, bridges, tunnels, and transportation infrastructure. Lindy Paving offers asphalt paving contracting and manufactures asphalt mix at plants in Pennsylvania. Tracing its roots to 1955, P.J. Dick is owned by the families of CEO Clifford Rowe and the late Robert Hecht.

Thompson Mahogany specializes in importing more than 20 different species of tropical hardwoods, mainly from Africa, Central and South America, and Australia, for distribution to retailers and manufacturers. The company also produces hardwood lumber, decking, and flooring. Its woods can be found on the deck of Bill Gates' mansion, in Martin guitars, and in Steinway pianos. Englishman Lewis Thompson founded Thompson Mahogany in 1840 as a cabinet and furniture business that imported mahogany for its own uses. The company is owned and operated by Donald Thompson, who bought the company in 1985 (and is not related to the founder).

Commodore Builders provides project planning, pre-construction, construction, close-out, and warranty services to its clients in New England. The company focuses mainly on institutional, science and research, retail, and hospitality building and also does corporate interiors including custom millwork, audio and video installations, and complex lighting schemes. Commodore customers include MIT, Harvard University, Zoo New England, and Acadian Asset Management.

Mancini Duffy does more than just push furniture around when it comes to interior design. The firm offers spatial planning and interior architecture services on retail stores, corporate offices, public offices, and manufacturing facilities. Other services include facility management support, graphics and signage, and custom design of furniture, carpeting, and lighting. Clients have included Bloomingdale's, Accenture, and various New York city and state departments. It also serves those in the accounting, advertising, financial services, high-tech, legal, not-for-profit, publishing, and real estate sectors. In the US, Mancini Duffy operates offices in New York, New Jersey, Connecticut, and Washington, DC.

Perkins + Will (or modernly known as Perkins+Will) adds to skylines from Atlanta to Shanghai. The architectural firm designs edifices for corporate and civic clients, as well as schools, universities, and hospitals. Its projects run the gamut from office buildings and high-rise condominiums to hotels and convention centers to laboratories and elementary schools. The company also offers interior design, branding, planning, and urban design. Clients of the firm have included Chicago O'Hare, Duke University, Pfizer, and Time Warner. Perkins+Will operates from about 20 offices in North America, Europe, and Asia. Lawrence Perkins and Philip Will Jr. founded the firm in 1935.

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