Wirt Design Group provides interior architectural design services from pre-project planning to implementation, including proprietary 3-D modeling of projects and incorporating green design practices. The firm caters chiefly to the entertainment, financial and business services, hospitality, and technology sectors in California. It has worked on multiple projects for firms such as The Capital Group Companies and Northwestern Mutual. Other notable clients have included Yahoo!, Disney, and EarthLink. Principal Jeff Wirt founded the company in 1994.

Rentenbach Constructors provides general contracting, design/build, and construction management services for a wide variety of commercial and institutional projects, including medical centers, airports, schools, office buildings, light industrial and manufacturing facilities, churches, retail centers, and casinos. The firm serves customers in the Southeast, Southwest, and Midwest from its offices in North Carolina, Tennessee, and Texas. It has provided services for clients including Dana Holding, Caesars Entertainment, Wal-Mart Stores, and the University of Tennessee. T. J. Rentenbach, father of chairman Michael Rentenbach, founded the company as Rentenbach Engineering Company in 1946.

A company that was in construction before Reconstruction, McCarthy Building Companies is one of the oldest privately held builders in the US. The general contractor and construction manager ranks among the top builders of health care and education facilities in the country. Contracts include heavy construction projects (bridges and water- and waste-treatment plants), commercial projects (retail and office buildings), and institutional projects (airports, schools, and prisons). Subsidiary MC Industrial handles energy, auto, and other manufacturing projects. Timothy McCarthy founded the firm in 1864. His great-grandson, Michael McCarthy, sold the firm to its employees in 2002.

Black & Veatch Ltd. engineering firm provides consulting, refurbishment, and decommissioning services for water-related projects in Europe. A subsidiary of Black & Veatch Holding, the group provides design and management of dams, pipelines, canals, water/wastewater and industrial water treatment plants, as well as the refurbishment of water and wastewater industry structures and facilities. Black & Veatch Water Europe also provides mechanical and electrical engineering design services, building design and project management services, and IT services.

Raymond Construction puts it all together deep in the heart of Texas. The firm provides general contracting and construction management services, primarily in the Dallas/Fort Worth and Austin, Texas areas. Projects include office buildings, industrial warehouses, retail centers, schools, and healthcare facilities. Projects include the General Motors Call Center in Austin; the MCA Student Life Center for McKinney (Texas) Christian Academy; and the Active Power Production Facility in Austin. The company, formed in 1952 by Charles B. Raymond, is owned by President Charles M. Raymond and executives Lee Hall and Rusty Burnett.

Day & Zimmermann offers services as distinct as day and night. Its family of companies provides engineering and construction, design, plant maintenance, security, staffing, munitions decommissioning, validation, and asset management services worldwide. A top global contractor, Day & Zimmermann provides operations, contract support, and maintenance services to US and foreign governments, as well as commercial customers. Its Day & Zimmermann NPS unit maintains half of the US's nuclear plants. Staffing subsidiary Yoh Services specializes in filling IT, engineering, and health care positions. Founded in 1901, Day & Zimmermann is owned and managed by the Yoh family, which has headed the firm for three generations.

Synagro Technologies, Inc.,the company collects biosolids created by the treatment of wastewater at municipal and industrial plants throughout the US. Synagro Technologies makes money by drying, pelletizing, composting, and incinerating the biosolids and by transporting them for land application as soil base and fertilizer. The company also cleans out sewage lagoons and designs biosolids recycling systems. Synagro Technologies is owned by investment firm The Carlyle Group.

H+M Company = a provider of heavy industrial and manufacturing facility construction services. The group provides architectural, engineering, and construction services for manufacturing, distribution, power, and heavy industrial facilities around the US. It also offers construction management for educational and institutional projects and is a top school builder. H&M Company is also consistently ranked among the top design/build firms in the US. In 1957 Charles "Chicken" Fite and Frank Warmath established the company, which became one of the first US contractors to use design/build project delivery. Chairman David Fite, his brother Richard Fite (CEO), and president and COO Jim Campbell own the company.

One of the largest construction companies in the southeastern US, M. B. Kahn Construction Co. works on commercial, institutional, and industrial projects including hospitals, airports, shopping centers, and manufacturing plants. Additionally, it is rated as one of the top builders in the nation's education market. The company provides general contracting and design/build delivery services, as well as construction management and program management services. Russian immigrant Myron B. Kahn founded the company in 1927. It is now chaired by Alan Kahn, his grandson. The group operates through divisions in South Carolina and Georgia.

Willerby Holiday Homes makes manufactured vacation homes, which are sold through dealers and mobile home parks in the UK and Europe. The upscale homes are generally equipped with most appliances and furniture as well as stainless steel and porcelain fixtures and central heating. Willerby, which began as a travel trailer manufacturer, has brought innovations like central heating, double glazed windows, cathedral ceilings, and pitched roofs from traditional homes to the manufactured home market. One of the largest manufactured home companies in the UK with 30% of the market, Willerby is owned by Scaid Investments. It was incorporated in 1944.

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