IMEG Corporation

From the website:Carollo Engineers is an environmental engineering firm that specializes in the planning, design, and construction of water and wastewater facilities.

AECOM Technology Corporation is an international professional technical services company providing consulting, design, program and construction management and operations and maintenance support to the transportation, environmental and building industries. The company serves both government and private clients. Founded in 1990, Aecom is nearly 85 percent employee-owned and is comprised of operating companies that have been in business for nearly 100 years. AECOM also provides technical support, international development assistance, and mining and power services. AECOM Technology Corporation is headquartered in Los Angeles and operates additional offices throughout the United States., Canada, Asia, the Middle East, Africa, Australia and Europe.

HDR is an integrated architectural, engineering and consulting firm that provides a variety of related services to clients in the civic, water and wastewater, power, solid waste, science and technology, health care and transportation markets. Its subsidiaries include HDR Engineering and HDR Architecture. The company s services include architectural design, asset management, construction, construction administration and management, design engineering, interior design, landscape architecture, master planning, pollution prevention, power delivery, programming, security, sustainable design and transportation planning. It was founded by H.H. Henningson in 1917 and has headquarters in Omaha, Neb. The company s network of more than 100 offices has worked on projects in all 50 states and more than 60 countries. HDR has an office location in Dallas.