Leighton Holdings provides engineering and construction services for mining, infrastructure, commercial, and environmental projects in Australia, the Asia-Pacific region, and the Middle East. Typical contracts include the maintenance and construction of pipelines, mines, highways, tunnels, and commercial buildings. The group's largest subsidiaries are mining, construction, and services firm Thiess and project management firm Leighton Contractors. The 45%-owned Al Habtoor Leighton division, formed in 2007, is one of the largest construction contractors in the booming Gulf region. Leighton also develops real estate and offers facilities management services. German construction firm HOCHTIEF owns 55% of the group.

Windows of opportunity open daily for Andersen, a well-known maker of wood-clad windows and patio doors in North America. Andersen offers window designs from hinged, bay, and double-hung to skylight, gliding, and picture windows. Its Renewal by Andersen subsidiary provides start-to-finish window renewal services, including in-home consultations, in more than 100 markets in the US. Subsidiary EMCO Doors makes storm and screen doors. Through independent and company-owned distributorships (including its Andersen Logistics division), Andersen sells to homeowners, architects, builders, designers, and remodelers. Andersen Corporation is owned by the Andersen family, the Andersen Foundation, and company employees.

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.

Founded in 1981, Atlas Roofing operates 15 manufacturing facilities across North America and distributes its products throughout the world. This Atlas may not be able to hold up the sky, but it can certainly protect you from its elements. Atlas Roofing manufactures residential and commercial roofing and insulation products that include polyiso and polystyrene sheathing and insulation, foam insulation, roll roofing, and shingles. It is a pioneer in manufacturing foam insulation products free of environmentally harmful blowing agents. Its Falcon Foam division specializes in earth-friendly HCFC-free (hydrochlorofluorocarbon-free) insulation products. Atlas also offers field services for drainage assessments.

The construction operations of The Pepper Companies provide general contractor and construction management services for sectors including health care, retail, entertainment, hotels, industrial, and education. Projects include the 29,000-sq.-ft ape habitat at the Lincoln Park Zoo, 900,000 sq. ft. of new or renovated space at Central DuPage Hospital, and more than a dozen Galyan's outdoor stores throughout the Midwest. Pepper Environmental Technologies provides environmental services. Stanley F. Pepper founded the company in Chicago in 1927; the group is owned by his family and employees of the firm.

Siteserv is a holding company that comprises a group of seven companies in infrastructure, industrial, and utilities support services and products related to power generation, telecommunications, major public event operations, and road construction. The companies Deborah Services, Easy Access, Donohue Scaffolding, Rentafence, RoanKabin Modular Building Systems, and Sierra Communications operate out of over 50 locations in three divisions (infrastructure and utilities, industrial and multidiscipline, and access equipment) throughout Ireland and the UK. Siteserv was founded in 2004.

Roy Anderson Corp. placed its bets on the casino and hospitality industry and won a position among the largest construction companies in the US. The commercial, industrial, and institutional contractor also ranks among the leading builders of sports facilities. Its projects include churches, hospitals, medical centers, schools, prisons, manufacturing plants, condos, and government buildings. Notable projects include the Grand Casino Resort in Tunica, Mississippi, and Harrah's Louisiana Downs in Shreveport. The family-owned company also has another Mississippi-based construction company, Harrell Contracting Group. Chairman Roy Anderson Jr. founded the company in 1955; it is now run by Roy Anderson III.

Founded in 1990 as DGH Systems, the company was bought by Italy-based Carel SpA in 2000 and adopted its current name. Carel USA doesn't want you to sweat the small stuff -- or the big stuff either, for that matter. The company manufactures and distributes industrial and commercial humidifiers; heating, ventilation, air-conditioning, and refrigeration (HVAC/R) controls and sensors; and monitoring and remote management systems for industrial, commercial, and clean room applications. Carel USA markets its products to HVAC/R market manufacturers, installers, and designers.

Hood Industries' products come from deep in the forest to a place in your 'hood. The company manufactures plywood, lumber, and siding from Southern Pine at mills in Mississippi and Georgia. Its McEwen Group division distributes hardwood and softwood products to the specialty millwork industry and to cabinet and furniture makers throughout the Southeast and Arizona. In New England, Hood Industries' McQuesten Company division distributes building products, including composite and vinyl products, to independent retail lumberyards. Hood Industries was established in 1983. Hit by falling prices and demand for building products, the company closed its mill in Coushatta, Louisiana, in 2008.

Deffenbaugh Industries, Inc., collects, transports, and disposes of commercial and residential waste in Kansas, Iowa, Missouri, and Nebraska. It also provides industrial waste services, quarrying services, the disposal of construction waste, and commercial and residential recycling. Deffenbaugh Industries' more than 700-acre Johnson County Landfill is the largest disposal facility in Kansas. The company's Johnny on the Spot division rents portable toilets.

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