Atomic Energy of Canada Limited (AECL) is not going to split anytime soon. Known for designing and developing the CANDU nuclear power reactor, the company designs and builds nuclear reactors and provides services such as construction management, waste management, decommissioning, and life-extension projects related to CANDU reactors worldwide. It also operates two laboratories for nuclear technology research and development, thanks to partial funding from the Canadian government, which is looking to sell its interest in AECL.

Guarantee Electrical has been powering up St. Louis since it "guaranteed" to electrify the World's Fair in 1904. (It delivered on the guarantee). Now a major US electrical contractor, the company offers commercial, institutional, and industrial services including construction, design/build, communications/data, and maintenance. Guarantee Electrical operates throughout the country and has worked on such varied projects as the MGM Grand in Las Vegas and several post office and prison facilities. Its GECO Systems division installs and services intercom, closed-circuit television, and other audio-visual systems. The Oertli family owns and operates the firm.

Doster does what it takes to build its client list. Doster Construction provides construction, design, and project management services for multi-unit residential, health care, educational, and industrial construction projects. It has built distribution centers for Wal-Mart, and Chrysler , apartments in Alabama, and hospitals in Florida (about 50% of its construction is in the health care market). Doster performs most of its work in the southeastern US, although it also takes on projects in other regions. It operates from offices in Birmingham, Alabama, Orlando, Nashville, and Atlanta. Chairman Thomas Doster founded the family-controlled company in 1969, after returning from military service in Vietnam.

Intechra LLC provides electronic recycling, refurbishment, and remarketing services. Equipment given new life by Intechra is sold through domestic and international resellers. When customers want their computers, servers, and other equipment trashed, Intechra ensures destruction of proprietary data. Intechra operates outlets nationwide. The company currently processes about 100 million pounds of electronics annually. Arrow Electronics, an upstate New York-based electronics distributor, acquired Intechra in 2010 from private equity firm Environmental Capital Partners.

Thomas Armstrong has muscled its way into being one of the leading aggregates producers in the UK. Thomas Armstrong Holdings Ltd. also makes custom joinery, concrete blocks, and prestressed concrete (flooring, stairs, and panels) and operates a general construction business (residential, commercial, and industrial) and a timber division. Thomas Armstrong, a joiner, cabinetmaker, and wheelwright, founded the business in 1830. A century later the firm converted to a limited company. It has grown through acquisitions of companies such as ACP (Concrete) Ltd., William Rainford Holdings, Barnett's, Robinson's Concrete, and Tayban Developments. Thomas Armstrong has about 15 locations across the UK.

The Beechwood Organization is a residential developer in New York, primarily active on Long Island. The company has built more than 5,500 single- and multifamily residences in some 55 communities since it was founded in 1980. Among the developer's more notable projects is Nassau County's Meadowbrook Pointe Athletic Club & Spa, a $400 million gated, equestrian-themed, luxury community for residents aged 55 and up. The Beechwood Organization has built a number of homes in the Bronx and elsewhere in New York. Co-principals and founders Leslie Lerner and Michael Dubb own the company.

MASISA lets the chips fall where they may -- as long as they end up in its MDF (medium-density fiberboard) and particleboard. MASISA manufactures particleboard, fiberboard, and related products, such as doors in Latin America. The company sells its wood board products under such trade names as Placa Masisa and Facilplac. Customers include furniture makers and the construction industry; Masonite International accounts for more than 40% of its solid wood product sales. One of the largest forestry groups in the world, MASISA has more than 240,000 hectares of forestry and reserve land in Argentina, Brazil, Chile, and Venezuela. Subsidiary Forestal Tornagaleones manages MASISA's timberlands in Argentina and Chile.

Uralita makes building materials including insulation, gypsum, roof tiles, and pipes. Product lines include Pladur plasterboard for building partitions, Cobert roofing tiles and bricks, and Adequa plastic pipes for commercial and infrastructure use. Insulation accounts for about half of the group's business. The company has about 45 production plants in operation or under development throughout Europe. Uralita is the market leader in Spain (where it makes about half of its revenues) and Portugal. The wealthy Serratosa family owns 79% of the firm through investment vehicle Nefinsa. Uralita was founded in 1907 as a fiber cement company.

HNTB knows the ABCs of A/E. The company ranks among the pack of pure designers, or firms that derive most of their revenues from architecture, engineering, or environmental design operations. It specializes in transportation infrastructure projects and government contracts. HNTB is best-known for its highway and transit system design (its portfolio includes the New Jersey Turnpike) as well as airports (Chicago's Midway) and sports arenas (Invesco Field in Denver). The company operates some 60 locations across the US. The employee-owned HNTB (its name once stood for Howard Needles Tammen & Berendoff) traces its roots to 1914.

Georgia-Pacific (GP) is the world's largest tissue products producer and the force behind such household items as Brawny paper towels and Quilted Northern bath tissues. Not one to be pigeonholed, the company makes a wide variety of other products including cardboard packaging, plywood and lumber, related chemicals, fertilizers, recycled paper fibers, Dixie-brand paper cups, touchless towel dispensers, and office paper. GP is the second-largest US forest products manufacturer (behind International Paper). A subsidiary of diversified group Koch Industries, GP has more than 300 manufacturing facilities in the Americas and Europe.

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