HNTB Corp

AECOM 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. AECOM also provides technical support, international development assistance, and mining and power services. AECOM is headquartered in Los Angeles and operates additional offices throughout the United States., Canada, Asia, the Middle East, Africa, Australia and Europe.

Founded in 1946, CH2M HILL is an employee-owned, full-service project delivery firm that provides engineering, construction and operations services. Its services include site selection, infrastructure planning, economic development, management consulting, energy management and planning, and licensing and permitting. CH2M HILL also offers project financing and development, process design, facilities management, and equipment assembly and system integration services. It provides practical technology solutions for water, environmental, transportation, nuclear, manufacturing, power and energy, pharmaceutical, communications, chemicals, electronics and biotechnology projects. The company s services also include drilling and well support, building operations and maintenance, decontamination and lean operations planning. In addition, it provides consulting services for planning, financing, initiating, optimizing and delivering infrastructure projects. Headquartered in Denver, CH2M HILL maintains a location in Los Angeles, and it serves the civil infrastructure, government and industrial sectors.

Founded in 1917, HDR is an employee-owned architectural, engineering and consulting firm. Headquartered in Omaha, Neb., it maintains more than 150 offices worldwide. The firm employs over 6,000 professionals, such as architects, engineers, consultants, scientists, planners and construction managers. HDR provides a range of services, such as architectural design, asset and construction management, capital planning and decision analysis. It also offers environmental, risk analysis, wastewater treatment, interior design, landscaping, laboratory consulting, and hazardous waste and program management services. The firm serves clients in the health care, government, institutional, transportation, science and technology, and power and energy sectors. HDR maintains one of its locations in Irvine, Calif.