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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.

E-J Electric Installation, established in 1899 by Jack Enright and Theodore Joseph, has provided electrical contracting services almost as long as the electric industry has been around. The company offers a wide range of services, from small electrical maintenance projects to the construction of power plants. It designs, installs, and maintains communications networks through E-J Communication Systems. The company's Mutual Electric division handles retail projects. E-J also has worked in the transportation, data center, and health care, industries. Chairman J. Robert Mann and his family control E-J Electric Installation, which was acquired by Mann's father, Jacques, who first joined the firm in 1912.

Multi-trade subcontractor Ecker Enterprises specializes in drywall installation, painting, plastering, insulation and other specialty contracting services for commercial clients in Illinois and Florida and for residential customers in Illinois, California, and Nevada. Immigrant house painter Morris Ecker started the company that bears his name in 1923. Ecker Enterprises today is owned by employee shareholders.

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