Danze & Davis Architects provides residential design and architectural services. The firm specializes in custom designing detached and attached homes. It offers about a dozen different collections of architectural plans for its home designs in book and CD formats. Danze & Davis also provides architectural services for light commercial and industrial projects. Leo P. Danze and H. Ross Davis founded the firm in 1960.

David Evans and Associates (DEA) can be classified as wind, land, and water. Consistently ranked among the leading "pure design" engineering and architectural firms, the employee-owned company serves four markets: energy, land development, transportation, and water resources. Services include marine surveying and watershed management, residential community development, heavy rail and highway design, and energy facility design. Projects include the Snohomish Cascade master planned community in Washington and the Interstate 5 bridge over the Columbia River in Portland, Oregon. DEA maintains some 20 offices in Arizona, California, Colorado, Idaho, New York, Oregon, and Washington.

Ryan Consultants & Designers. The company specializes in civil works and environmental and energy projects for such government and commercial clients as the U.S. Navy, the U.S. Army Corps of Engineers, and MACTEC. It also handles energy conservation and communications projects. The women-owned and Hispanic-owned firm and has California offices in Los Angeles, Sacramento, San Diego, and San Francisco; it also has operations in Alexandria, Virginia. President and CEO Wanda M. Martinez, who named the enterprise after her nephews, owns the firm, which she launched in the 1980s.

Architects Delawie Wilkes Rodrigues Barker (A|DWRB) has designs on the Southern California market. A|DWRB provides design/build architectural services that range from analysis (including due diligence, code analysis, and site analysis of existing conditions to determine specific use suitability of a site or building) to master planning and interior design services. Its portfolio includes designs for biotech and advanced technology firms, educational facilities, and hospitality projects. A|DWRB, which was founded in 1961, focuses on projects in Southern California, but has also served clients around the globe.

Dick Clark Architecture designs residential and commercial buildings for customers in Austin, Texas, and throughout Central Texas. The design firm has created projects for such notables as Willie Nelson and Jerry Jeff Walker, as well as for customers Whole Earth Provisions, By George, Austin City Limits, Mezzaluna Restaurant, and steak house franchisor Ruth's Hospitality Group.

Downer EDI works to keep things working. The company provides engineering and infrastructure management for public and private entities throughout Australia, New Zealand, Asia, and the Pacific. The company strives to be a "one-stop" provider for engineering services that include design, project and facilities management, operations, consulting, and maintenance. The company is organized along five divisions representing its primary activities: infrastructure services through Downer EDI Works, Downer EDI Engineering, Downer EDI Mining, Consulting Services, and Downer EDI Rail. Although the company's footprint covers the Asia/Pacific region, Downer EDI's Australian operations account for about 70% of its revenue.

Ducts Unlimited Mechanical Systems helps businesses maintain the perfect business environment. The company offers commercial HVAC installation (heating, ventilating, and air conditioning) and related services to various businesses in the Denver metropolitan area. Ducts Unlimited does everything from maintenance of existing systems to ground-up system installation; it also specializes in the maintenance and installation of computer room A/C systems. Additionally, the company runs a sheetmetal fabrication shop that serves the company's commercial customers and sheetmetal contractors. Founded in 2000, Ducts Unlimited is privately-owned and headed by president Robert Leishman.

Dudek, where's my environmental consultant? California, apparently. The environmental firm , Dudek, works with private companies and municipalities to provide engineering, environmental consulting, construction, design, and project management services. The firm has overseen projects that involve natural resource management, infrastructure development, and regulatory compliance. Dudek specializes in water infrastructure, wastewater engineering, energy, transportation, urban forestry, education, and real estate development projects. Founded in 1980 by president Frank Dudek, the employee-owned company has seven offices in California.

Dynamic Systems, Inc. (DSI) is dynamite with pipes. The company fixes and installs plumbing and exhaust systems (without blowing them to bits). The mechanical contractor specializes in HVAC (heating, ventilation, and air conditioning), plumbing, and sanitary and exhaust piping projects for facilities including cleanrooms, hospitals, high-rise office buildings, and industrial plants. Biopharmaceutical and semiconductor firms Biogen Idec and Infineon Technologies are among its clients. It serves others in the health care, hospitality, and commercial sectors. The company has regional offices in Arizona, Massachusetts, North Carolina, Texas, and Virginia. DSI is a holding of Austin, Texas-based FGI Group, Inc.

E&M's business is set in stone (of sorts). E&M Concrete Construction produces ready-mix concrete and cement for commercial, infrastructure, and residential projects in California. Most of the company's business comes from the construction of concrete foundations for new buildings. E&M serves Ventura County and the Los Angeles area. Hispanic Business magazine has ranked the company as one of the largest Hispanic-owned businesses in the US. President Edmundo Mendez owns the company, which he founded in 1984.

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