Parsons provides engineering, construction, and management services for corporate, industrial, institutional, and government projects all over the world. It designs and builds power plants, dams, commercial buildings; provides environmental remediation services including hazardous materials cleanup; and adds improvements to airports, rail systems, bridges, and highways. Its Commercial Technology unit serves corporate and government clients with a wide variety of capabilities including design, development, management, and support services. Other units include Parsons Water & Infrastructure, Parsons Infrastructure & Technology, and Parsons Transportation. The employee-owned group was founded in 1944.

Rentenbach Constructors provides general contracting, design/build, and construction management services for a wide variety of commercial and institutional projects, including medical centers, airports, schools, office buildings, light industrial and manufacturing facilities, churches, retail centers, and casinos. The firm serves customers in the Southeast, Southwest, and Midwest from its offices in North Carolina, Tennessee, and Texas. It has provided services for clients including Dana Holding, Caesars Entertainment, Wal-Mart Stores, and the University of Tennessee. T. J. Rentenbach, father of chairman Michael Rentenbach, founded the company as Rentenbach Engineering Company in 1946.

Thornton Tomasetti has built a high profile by designing some tall towers. The structural engineering firm, which designs some of the world's highest buildings, offers is services through three main practice areas: building structure; building skin; and building performance. Services include structural engineering, design consulting, 3-D modeling, and historic preservation. Thornton Tomasetti also provides building forensics, property loss consulting, and emergency response services. The company works around the world on projects such as airports, arenas, hospitals, hotels, museums, and schools. It has offices in the US, Europe, Asia, and the Middle East.

The Monarch Cement Company, together with its subsidiaries, engages in the manufacture and sale of portland cement and ready-mixed concrete under the MONARCH brand name. Its products also include concrete products, and sundry building materials that are used in highway, bridge, and building construction. The company sells its products primarily to contractors, ready-mixed concrete plants, concrete products plants, building materials dealers, and governmental agencies in Iowa, Kansas, Nebraska, Missouri, Arkansas, and Oklahoma. The Monarch Cement Company was founded in 1908 and is based in Humboldt, Kansas.

Southland Industries is one of the largest construction and engineering companies in the US. The employee-owned group provides design/build, electrical and mechanical engineering, electrical maintenance, plumbing, fire protection, HVAC, and facilities management services. Southland offers custom solutions for clients in the health care, life sciences, hospitality, industrial, education, government, and telecommunication sectors. Projects include the renovation of the Pentagon following the terrorist attacks of September 11, and the M Resort in Las Vegas. Founded in 1949, Southland Industries has about a half-dozen offices in California, Maryland, Nevada, and Virginia.

Peckham Industries has a crush on road materials. Peckham Industries, Inc. produces asphalt, crushed stone, ready mix concrete, and liquid calcium chloride (used to melt ice in the winter and to keep road dust down in the summer). It also builds and repairs roads. Peckham Industries, Inc. and its subsidiaries operate throughout New England with locations in New York, Vermont, and Connecticut. Peckham's plants include liquid asphalt facilities, hot mix plants, and a reclaiming facility. The company's Peckham Materials Corp. unit operates quarries and supplies aggregates through the Hudson River Valley. William Peckham, father of chairman and president John Peckham, founded Peckham Road Corp., the flagship of Peckham Industries, in 1924.

Quanta Services, electric and gas utilities and telecom providers would be all juiced up with no way to go. The company designs, installs, repairs, and maintains network infrastructure nationwide, including electric, gas, broadband cable, and telephone and data lines. Quanta also provides outsource management services and other specialty services such as installing traffic and light rail control systems, conducting directional drilling and rock trenching, and constructing wind generation facilities. Around 85% of its revenues come from gas and electric work.

Steeplejack isn't afraid of heights. Traditionally a scaffolding contractor, the company also offers asbestos abatement, insulation, general plant-maintenance services, and project management to industrial customers. Its customers hail primarily from the oil and gas, pulp and paper, power generation, mining, and chemical industries. Steeplejack operates predominantly in Western Canada through eight branch locations. Vancouver-based affiliate Westcor offers fireproofing and environmental services. Steeplejack is part of Texas-based The Brock Group.

Theodor Nagel deals in timber trading and operates sawmills. The company provides about 120 different kinds of timber, including five different species of ebony and 15 rosewood species, for manufacturing musical instruments such as pianos and stringed and percussion instruments, as well as for knife handles, ships decks, and crafts. The company, founded in Hamburg in 1837, is owned by the Krauth family, which has overseen operations for six generations.

UK construction management firm Mace Limited oversees the construction of such facilities as airports, hospitals, and schools, as well as commercial, industrial, and residential buildings. It offers planning and operations services to property owners through subsidiary Mace Macro; subsidiary Mace People provides executive search and recruitment services for the construction and property sector. Mace also offers related services including legal support and management consulting. Mace's primary markets include Europe, Africa, and the Middle East. Mace was founded in 1990 by a group including chairman Bob White.

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