The company makes acoustic control products and soundproof rooms and equipment to muffle the noise of industrial machinery. Its products include absorption systems, recording studios, jet-engine test cells, and sound-control doors. IAC serves the architectural, air-conditioning, industrial, power-generation, and aviation markets in more than 50 countries throughout the world. In 1998 the company, a subsidiary of IAC Holdings, went private after an unnamed European investor bought its remaining public shares. Martin Herschorn founded the company in 1949.

One of Spain's largest civil engineering and construction groups, OHL operates through six divisions that specialize in infrastructure projects in the Americas and Europe. It also frequently undertakes work on airports, marine ports, railways, oil and gas pipelines, and water treatment plants. Environmental services include desalination of seawater and purification of urban sewage. In 2010 OHL spun off part of its OHL Concesiones Mexico unit, which operates more than 20 toll roads, in order to raise capital to fund road-building projects in Mexico and make other acquisitions.

Arkansas Face Veneer, a subsidiary of Hartzell Industries, produces backed veneer, spliced veneer faces, door and rail sketch faces, stock and plywood faces, wood veneer edgebanding, counter fronts, and custom and specialty veneer products. The company offers an inventory of more than 100 species of domestic and imported decorative veneer flitches from the Americas, Africa, Australia, and Europe, ranging from its most popular red oak, hard maple, cherry, and eastern red cedar products to more exotic mahogany, gaboon, and bubinga. Arkansas Face Veneer was established in 1956.

The firm was founded by Scottish-born Henry Alexander, grandfather of chairman and CEO Patrick Alexander. Cold Spring Granite has been chipping away as a granite business since the late 1800s. The company operates about 30 granite quarries and five fabrication facilities in Canada and the US that produce 1.5 million net cube of granites per year for commercial, residential, and institutional use. Its granite products include floor tiles, countertop slabs, paving materials, and exterior building blocks; its Memorialization division makes upright monuments, bronze markers, urns, bases, and mausoleums. Cold Spring's granite can be found in national monuments, cemeteries, and the columns of Minnesota's state capitol.

Adolfson & Peterson provides general construction, construction management, design/build, and facilities maintenance services. With 10 offices scattered around the United States the company provides services for health care, multifamily residential, education, and institutional projects. Adolfson & Peterson also works on retail, office, hospitality, and manufacturing and distribution projects and offers historic renovation services. George Adolfson and Gordon Peterson established the company as a homebuilder in 1946. The Adolfson family has a majority stake in the company. David Adolfson (son of George Adolfson) continues to be active in the company and serves as chairman emeritus.

Artisan (UK) is skilled at the art of real estate. Through a number of operating subsidiaries, the company builds, invests in, and manages multifamily residential and commercial properties throughout the UK. Subsidiary Rippon Homes builds three- to five-bedroom houses and bungalows, including its Living Heritage line of luxury homes in the East Midlands. Artisan (UK) Developments is engaged in the development of small business parks and light industrial properties; construction is managed by Artisan (UK) Projects. The group's property investments are held by Artisan (UK) Properties. Chairman Michael Stevens owns 30% of Artisan (UK) through Aspen Finance.

Parsons Electric empowers its customers by providing electrical and voice and data communications installation for commercial, health care, hospitality industrial, and other facilities. Founded in 1927, Parsons operates through three divisions. Its electrical division designs and builds systems while the technologies division handles voice and data communications design, installation, service, and maintenance. The technical service unit installs, repairs, and tests systems, with a specialty in servicing printing equipment. Parsons' clients have included 3M, Boise Cascade, Iron Mountain, and the Minnesota Timberwolves. The company has offices in Minnesota, Wisconsin, and Arizona.

Psomas, the engineering firm offers construction management, land surveying, water resource planning, environmental, and civil engineering services mainly to the water, transportation, and land development markets in the Western US. The company has both public and private sector clients. Among the projects it has had a hand in developing are the Los Angeles International Airport, Port of Los Angeles, University of California, Los Angeles, and Walt Disney Concert Hall. Psomas has offices throughout California, as well as in Arizona an Utah. The family-owned firm was founded in 1946 by George Psomas.

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.

DooleyMack Constructors does the heavy lifting on big construction projects. The company provides design and planning, construction management and general contracting services for commercial, industrial, multifamily residential, and institutional projects. DooleyMack has built and renovated everything public schools, condos, and performance arts centers to waste disposal facilities and laboratories. The company mainly operates in the central and southeastern regions of the US and has several offices in Florida, as well as locations in Georgia, Texas, North Carolina and South Carolina. The privately-owned company was founded in 1977 by executives Bill Dooley and Ken Smith. CFO Wendy Mack later joined the firm.

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