OYO Corporation, which conducts geological research and consults on construction projects. Its geological services include aerial surveys, geophysical exploration, well logging, and fossil and rock analysis. The firm also offers construction consultancy services such as land-use and city planning, environmental engineering, and groundwater and soil pollution studies. OYO makes measuring instruments such as seismometers and borehole logging systems. The company also provides risk management and disaster prevention services.

Opus Group Berhad -- operating primarily through its subsidiaries, including Opus International Consultants (Opus IC) -- provides asset development and asset management services for clients who are developing or maintaining such massive projects as highways, airports, hospitals, sports complexes, and mixed-use developments. The company's primary source of revenue comes from its engineering, planning, and other related consultant services. Opus Group Berhad, a subsidiary of engineering and health care group UEM Group Berhad, has more than 80 offices in Malaysia, New Zealand, Australia, the UK, Canada, Vietnam, and India.

The Louis Berger Group provides civil, structural, mechanical, electrical, and environmental engineering services for commercial and government projects around the world. The engineering firm has worked on high-profile projects such as the Pennsylvania Turnpike, the first toll expressway in the US and the renovation of the Lincoln Memorial Reflecting Pool. Louis Berger and its affiliates also has a significant overseas presence. It has built highways, airports, seaports, and dams and contributed to cultural and environmental preservation for projects in 140 countries. The privately-held group also has worked on reconstruction projects in Iraq and Afghanistan.

Dean and Dyball is always up to something constructive. The company is one of the UK's largest privately owned construction companies. The company focuses on three main areas: civil engineering (water infrastructure, telecommunications, roads), building (health, education, retail, commercial, residential), and rail (stations, depots, facilities management). Dean & Dyball has worked on projects for clients such as Thames Water, Chelsea Football Club, and Kingston University. The company was borne out of the 1970 joint venture between John Dean and Peter Dyball Civil Engineering. UK construction giant Balfour Beatty acquired Dean and Dyball and 2008.

Cavalier Homes builds castles for regular Joes. Through about a half-dozen plants the company makes manufactured single- and multi-section homes for the low- to medium-priced market in the south-central and south-Atlantic US; it delivers around 4,000 homes annually. Louisiana is its largest market. Cavalier Homes also makes cabinetry and laminated wallboard. The company markets its products through a network of about 50 exclusive and about 240 non-exclusive dealers, as well as one company-owned retail center. Southern Energy Homes, a subsidiary of Berkshire Hathaway portfolio company Clayton Homes, bought Cavalier Homes for nearly $50 million in 2009.

W.G. Mills has been going to school. The construction management and general contracting company is one of Florida's top school builders, tackling some 200 education facility projects. Operating as Mills Gilbane, the company also builds industrial, commercial/retail, residential (such as clubhouses and golf-course homes), and health care facilities. Its public facility projects include libraries and police stations. One of the top contractors in the US, Mills Gilbane is also a leading construction management at-risk firm. CEO Walter G. Mills founded his namesake business in 1972. Rhode Island-based Gilbane Building bought the company in 2010.

Perkins Eastman Architects stands tall as one of New York City's top architecture firms. It offers urban, interior, and sustainable design and planning services not only in the Big Apple, but other parts of the US and internationally in Asia, Europe, the Middle East, and South America. Perkins Eastman specializes in buildings and facilities that serve the cultural, education, government, health care, technology, hospitality, office, retail, and senior living sectors. Notable projects include the TKTS Booth -- one of the world's most complex all-glass structures -- in New York's Times Square. The privately held firm was co-founded in 1981 by chairman Bradford Perkins and principal Mary-Jean Eastman.

StressCrete was founded in 1953 as a concrete utility pole manufacturer. Although StressCrete Group makes poles for myriad purposes, you won't find any firefighters sliding down its products. StressCrete makes a wide variety of spun concrete poles for street lighting, utility, and ornamental applications. The company's special use products include flag poles, camera surveillance poles, traffic sign and signal poles, sports lighting poles, closed circuit television poles, and microwave towers. The group's King Luminaire unit, which was acquired in 1985, makes decorative outdoor lighting products. King Luminaire also offers site amenities, such as benches, trash receptacles, bicycle racks, and tree guards/grates.

CertainTeed Corporation is a leading North American manufacturer of building materials including roofing, vinyl and fiber cement siding, trim, fence, railing, decking, foundations, insulation, gypsum, ceilings, and pipe products. Headquartered in Valley Forge, Pennsylvania, CertainTeed has approximately 7,000 employees and 70 facilities throughout the United States and Canada. Through its Vision, Mission, Values and Objectives (VMVO) initiative, CertainTeed strives to be the preferred choice for innovative building products and systems by delivering a superior Customer experience to a broader market through the development of exceptional team performance and world-class processes.

Henkels & McCoy (H&M),the firm provides engineering, construction, and network development services globally. H&M also installs aerial and underground electrical distribution systems, gas transmission lines, and fiber-optic networks on electric transmission towers or along railroad rights-of-way. It has some 80 offices throughout the US, as well as Canada and Mexico. John Henkels Jr. and John McCoy founded H&M in Philadelphia in 1923 as a tree-trimming and landscaping firm. Employees and the Henkels family own H&M.

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