Kleinfelder, Inc

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 1945, Albert A. Webb Associates is a full-service engineering and consulting company. It offers a variety of civil engineering and master planning services. The company provides water and wastewater treatment, feasibility study, project budgeting, energy management and stormwater quality control solutions. Albert A. Webb Associates also offers a range of traffic and transportation services, including traffic control and signal design. It provides construction management, inspection and environmental engineering services. The company offers tax consulting, entitlement processing and landscape architecture solutions. Albert A. Webb Associates provides land surveying and mapping, database design and drainage services. It serves various city, county and finance agencies, as well as commercial, industrial and residential developers.

Established in 1991, Aspen Environmental Group is a multidisciplined environmental company that specializes in a range of environmental impact assessment, power generation, mitigation monitoring and air quality permitting services. It offers a variety of flood control and watershed planning services, such as floodplain mapping, flood drainage assessment, watershed simulation, hydrologic routing, and analysis of detention basins and alternative flood control strategies. The various projects undertaken by the company include Matilija Dam Ecosystem Restoration, Canoga Park New Elementary School, Littlerock Reservoir, Los Angeles County Drainage Area and Diablo Canyon Nuclear Power Plant. In addition, it offers habitat restoration, hydraulic analysis and biological surveying services to its clients. The company has locations in San Diego, Phoenix and Agoura Hills, Calif.