Sidney Cubbage provides a variety of building engineering services, primarily air conditioning, heating, plumbing, refrigeration, and ventilation. Subsidiary Thames Ducting makes and installs ventilation ductwork. Sidney Cubbage's handiwork is most often found in hospitals, leisure centers, schools, and office buildings. Alfred McAlpine, Krispy Kreme, University of Reading, and various county councils are counted among the firm's clients. Sidney Cubbage founded his eponymous firm in 1927; semi-retired chairman Paul Remsbury bought the company along with Rod Harris in 1971.

Cutler Associates cuts to the chase with design/build, general contracting, and construction management services. The enterprise specializes in corporate and industrial buildings, educational facilities, senior housing, health care facilities, and tilt-up concrete projects. Past clients have included University of New Hampshire, TJX Companies, and General Motors. Cutler's staff of architects, engineers, estimators, and project managers shepherd projects from start to finish. Cutler Associates, which was founded in 1972, operates through regional offices in Florida, Massachusetts, and Pennsylvania.

Caltagirone has its roots firmly set in concrete. Founded as cement manufacturer G. Vianini & Co. in 1890, the holding company participates in residential, industrial, and public building projects, including dams, tunnels, and roads throughout Italy and other parts of Europe. It operates in cement businesses through its Cementir subsidiary. Caltagirone also has real estate and media interests. Its Caltagirone Editore unit publishes daily newspapers Il Mattino and Il Messaggero, and it has a 52% stake in Il Gazzetino. Caltagirone Editore also operates the Internet portal Caltanet. The Caltagirone family, with a nearly 55% stake, has controlled the company since 1984.

Aecon Group is both public and private about its day-to-day business. The company provides construction services for infrastructure projects including roads, bridges, tunnels, airports, and utilities. Through its buildings segment, Aecon is active in the construction and renovation of commercial, retail, institutional, hospitality, and multifamily residential properties. Industrial operations range from fabricating specialty pipe to designing and manufacturing steam generators. The group also manages public-private partnership and other alternatively financed infrastructure projects. Canada accounts for about 90% of Aecon's revenues.

The Penrod Company imports and exports forest products for use in the hardwood plywood, flooring, and furniture industries worldwide. The company also distributes PVC products and metal door hinges and fasteners for use in the residential and commercial construction industries. Penrod operates international subsidiaries: Foresbec in Canada and the UK; Noblebois in France; Penrus in Russia; and St. Raymond Veneers in Canada. Around since 1888, Penrod has supplied materials for some iconic products such as Wurlitzer organs, Zenith television cabinets, and mahogany interiors for 1965 Cadillac and Buicks. The Penrod Company is owned by CEO Edward Heidt Jr. and President Carl Gade.

Brown and Caldwell,the employee-owned firm provides environmental consulting and engineering services to industrial, governmental, and utility clients. Brown and Caldwell designs and builds water, wastewater, and solid waste systems for clients in the paper and pulp, food processing, and chemical manufacturing industries. It offers watershed and stormwater management services, as well as pipeline engineering and repair services. The company provides soil and groundwater remediation, underground storage-tank management, risk assessment, and customized data management systems. It operates from 45 offices spread throughout the US.

Hartzell Fan, an affiliate of Hartzell Industries, manufactures industrial ventilation and heating equipment for direct sale and for original equipment manufacturers (OEMs) in North America. Its product roster includes propeller fans; exhaust, duct, and utility fans; roof and wall ventilators; gas and steam heaters; and special application products such as adjustable pitch fans, mine- and marine-duty fans and blowers, and special duty axial flow fans, as well as related parts. It constructs its products from aluminum, steel, and fiberglass. Brands include Cool Blast and HartKool.

Fisher Development is a big fish in the tenant improvement general contracting sector. The company provides core/shell and historic preservation construction services for retail stores, restaurants, and corporate offices throughout the US and Canada. It also provides construction management and design/build services for its clients. Fisher Development builds for some of the top names in retail, including Sephora, Gap, Tiffany & Co., Foot Locker, and Williams-Sonoma. The company was originally founded as a residential subdivision builder in 1971 by chairman and owner Robert Fisher, brother of Gap founder and chairman Donald Fisher. The firm shifted to retail construction after building for Gap.

River City Construction, L.L.C.,the company constructs commercial, industrial, and institutional buildings for customers in Illinois, Iowa, and Missouri. River City also offers design services through its River City Design Group subsidiary and masonry and renovation work through its M. R. Mason Contractor subsidiary. Projects include the Hayden-Clark Alumni Center at Bradley University, the Methodist Medical Center in Peoria, Illinois, and the Rend Lake Water Treatment Plant in Benton, Illinois. The company, which operates through four offices, was founded in East Peoria, Illinois in 1984.

Barnes Gromatzky Kosarek Architects provides architectural design services that include needs analysis and programming; masterplan development; new construction, renovation, addition, and interior design; and project management. The firm specializes in civic, university, school, and government building projects, though it also designs commercial and residential buildings. Clients include The University of Texas, Texas A&M University, the City of Austin, and the US Department of Housing and Urban Development. The firm was founded in 1985 and is owned by principals Jay Barnes, Carl Gromatzky, and Thomas Kosarek.

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