Oldcastle Materials is the leading supplier of aggregates, asphalt, ready mix concrete and construction and paving services in the United States. Oldcastle Precast is the leading producer of precast utility and electrical vaults for the utility and telecommunication markets. Oldcastle Precast is also a leader in reinforced concrete pipe, catch basins and more. Oldcastle Architectural is the leading North American manufacturer of concrete masonry, lawn, garden and paving products and a regional leader in clay bric.

O'Connell Robertson (formerly O'Connell Robertson & Associates) is a design firm that offers architectural and engineering services. It has completed more than 1,000 projects, including new university, K-12 education, and healthcare facilities. Its services include interior design, electrical and mechanical engineering, energy conservation planning, and financial analysis. Clients include Texas A&M, the University of Texas, and the Metroplex Hospital. Established in 1950, the firm has offices in Austin and San Antonio, Texas. O'Connell Robertson is a privately-held corporation owned by several employees.

A.L.L. Masonry Construction offers a variety of masonry construction services, including installations, pavers, and walls. The company primarily serves commercial, industrial, and institutional customers in and around Chicago. Its list of clients reads like a who's who of area institutions, including Northwestern University, The University of Chicago, Soldiers Field, the Lincoln Park Zoo, and the Chicago Public Library, as well as churches, schools, and apartment communities. Minority-owned A.L.L. Masonry Construction was founded in 1959. It is controlled by CEO Luis Puig.

Trandes is right there in the trenches with the US government. The contractor provides engineering services for the Department of Defense (primarily the US Navy) and other federal agencies. Its offerings range from the repair of advanced communications equipment and systems engineering to acquisitions support and field services. Trandes also provides IT services including systems design, technical support, and training. The company has about a half-dozen offices strategically located near military locations in Florida, California, and near Washington, DC. CEO James Brusse founded Trandes in 1972 to provide the public transportation sector with software design and support services.

American Constructors builds facilities brimming with patriotic pride. The company has completed a variety of commercial and public building projects such as retail centers, post offices, schools, manufacturing facilities, and parking garages. Clients have included Motorola, Simon Property Group, 3M, various school districts, and the US Postal Service. The company offers construction management, as well as full design/build services, ranging from constructability analysis and estimating to turnkey and specialty projects. Founded in Austin in 1982, the company operates mostly in Central Texas. Affiliated company American Constructors California specializes in multi-unit residential construction.

Danis Building Construction can reach from the Buckeye state to the Sunshine state. The company provides commercial and industrial construction services in Ohio, Indiana, Kentucky, Tennessee, North Carolina, Georgia, and Florida. The third-generation, family-owned company offers construction management, design/build, general construction, and build-to-suit lease-back services. It specializes in public and private building and industrial projects such as offices, health care facilities, retail complexes, hotels, cultural facilities, schools, and industrial plants. Its projects have included the Cincinnati Children's Hospital and a federal courthouse in Kentucky. B.G. Danis established the company in 1916.

Pioneer Millworks is blazing a trail in the reclaimed-wood millworks industry. The firm reclaims or harvests a variety of wood species with a range of grades and finishes to produce timbers, flooring, and millwork. Much of the wood Pioneer Millworks reclaims comes from old barns and industrial buildings. The company has also launched a unit that manufactures engineered flooring that uses recycled material and formaldehyde-free adhesives. Sister company New Energy Works Timberframers focuses on creating timber-frame structures. Founder and president Jonathan Orpin owns Pioneer Millworks.

Lauren Engineers & Constructors is one of three business units of holding company The Lauren Corporation, along with Canadian-based KSI, East and KSI, West. Lauren Engineers & Constructors is a contractor that targets the power, chemical, special metals, and oil refining industries. In addition to its core engineering, procurement, and construction capabilities, the firm offers fabrication, project management, and mechanical and electrical maintenance services. With offices in Georgia, Tennessee, Texas, and Calgary, Lauren operates in about 40 states and Canada. Customers include Flying J, GE, and Proctor & Gamble. The company was originally established in 1984 as a subsidiary of Comstock Mechanical.

Founded in 1930 by William Murphy, CPM Development is owned by Oldcastle Materials (itself a subsidiary of UK-based CRH plc), which bought the firm in 1997. CPM Development Corporation paves the way for aggregate production in the Northwest. The company produces sand and gravel, ready-mix concrete, pre-stressed concrete building components, and asphalt paving materials for the construction industry. It also builds freeways, overpasses, and airport runways. The firm has about a dozen affiliate companies and some 30 locations in Washington, Oregon, and Idaho.

APi Group has a piece of the action in two main sectors: industrial and specialty construction services and life safety. APi has more than 30 subsidiaries, which operate as independent companies across the US, UK, and Canada. Services provided by the company's construction subsidiaries include energy conservation; electrical, industrial, and mechanical contracting; industrial insulation; and overhead door installation. Other units install fire protection, security, and alarm systems; fabricate structural steel; and distribute building materials. The family-owned company was founded in 1926 by Reuben Anderson, father of chairman Lee Anderson.

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