Federal Agencies

• U.S. Army Corps of Engineers, Los Angeles District

State Agencies

• Caltrans
• University of California
  • Irvine
  • Los Angeles

Counties

• Kern
• Los Angeles
• Orange
• Riverside
• San Bernardino
• San Diego

Cities

• Anaheim
• Apple Valley
• Arcadia
• Azusa
• Bakersfield
• Brea
• Buena Park
• Burbank
• Corona
• Costa Mesa
• Dana Point
• Diamond Bar
• Encinitas
• Fullerton
• Garden Grove
• Glendora
• Huntington Beach
• Irvine
• Laguna Beach
• Lancaster
• Lake Elsinore
• Lake Forest
• Long Beach
• Los Angeles
• Moorpark
• Murrieta
• Newport Beach
• Oceanside
• Ontario
• Orange
• Oxnard
• Palmdale
• Palos Verdes
• Pomona
• Pasadena
• Rancho Cucamonga
• San Diego
• San Dimas
• San Juan Capistrano
• San Marcos
• Santa Ana
• Santa Clarita
• Sierra Madre
• Signal Hill
• Temecula
• Tustin
• Vista
• Walnut
• West Covina
• Yorba Linda

Special Districts, Utilities and Institutions

• Atchison, Topeka & Santa Fe
• Castaic Lake Water Agency
• Catholic Diocese of Orange
• Cucamonga County Water District
• Elsinore Valley Municipal Water District
• Irvine Ranch Water District
• L. A. Community College District
• L. A. County Sanitation Districts
• L. A. Department of Water & Power
• Las Virgines School District
• March Joint Powers Authority
• Metropolitan Water District of Southern California
• Orange County Integrated Waste
• Orange County Sanitation Distrtict
• Orange County Water District Management Department
• Palmdale Water District
• Puente Hills Landfill Native Habitat Preservation Authority
• MCI – WorldCom
• Saddleback Valley Community Church
• Santa Margarita Water District
• Southern California Edison
• Yorba Linda Water District

Regional Agencies

• Orange County Transportation Authority
• Rivers and Mountains Conservancy
• Southern California Association of Governments
• Transportation Corridor Agencies
• Watershed Conservation Authority

Airports

• John Wayne Airport
• Long Beach Airport

Private Sector

• Acentec
• AKM Consulting Engineers
• Allen Matkins Leck Gamble Mallory & Natsis LLP
• Andrade Architects
• Beazer Homes
• Benchmark Real Estate Group
• Best, Best & Krieger
• Boyle Engineering
• Brookfield Davidson Homes
• Bryan A. Stirrat & Associates
• Burnett Companies
• Camp, Dresser, & McKee (CDM)
• Capital Pacific Holdings
• Centex Homes
• CH2M Hill
• Chandler Real Properties
• C.J. Segerstrom & Sons
• Coscan-Davidson Homes
• Cox Castle & Nicholson LLP
• Crescent Bay Company
• Crosby, Mead, Benton & Associates
• Crummer Realty Management Group
• David Evans & Associate (DEA)
• Daniel, Mann, Johnson & Menden (DMJM)
• Deleuw, Cather & Company
• D.R. Horton
• Evans-Collins Community Builders
• Excel Legacy
• Fieldstone Company
• General Dynamics Properties
• GeoSyntec Consultants
• Gibson, Dunn & Crutcher
• Goffman McCormick & Urban
• Grace Ministries International
• Griffin Homes
• HDR, Inc.
• Hoag Hospital
• Hogle Ireland
• HNTB
• Huitt-Zollars, Inc.
• Intravia Rock and Sand, Inc.
• Irwin Architectural Services
• Jacobs Engineering
• Jamison Engineering
• JCC Homes
• John M. Tettemer Associates
• JPI Student Living
• K Hovnanian Homes
• KB Home Costal Inc.
• Keith Companies
• KFM Engineering
• Kimley-Horn & Associates, Inc.
• LAN Engineering
• Lansing & Associates
• Lennar Partners
• Lewis Homes
• LSFII Fullerton, LLC
• Lyon Homes
• Makar Properties
• Malcolm Pirnie, Inc.
• MBK Senior Living Communities, Ltd
• Metro Point Engineers
• MIG
• MJW Development
• Moffatt & Nichol
• Montgomery Watson Harza
• Moore, Iacofano & Goltsman (MIG)
• Morrison & Forrester
• NJD, Ltd.
• NorthLake LLC
• Nossaman, Gunther, Knox & Elliot
• Ogden Enviornmental & Energy
• Olson Company
• Pardee Homes
• Parsons Engineering Science
• Parsons Brinckerhoff
• Providence Residential
• Psomas
• Pulte Homes
• Rancho Mission Viejo Company
• RBF Consulting
• Richmond American Homes
• RJM Design Group
• Ron Martin & Associates
• RSM Management Company
• San Juan Group
• Shapell Industries
• Shea Homes
• Standard Pacific
• Stonegate Development
• STV Inc.
• Sukut Construction
• SunCal Companies
• Talega Development Company
• Taylor-Hunter Associates, Inc.
• Tetra Tech, Inc.
• The Irvine Company
• The Koll Company
• Trammell Crow
• Unocal Land & Development Co
• Urban Pacific Builders
• URS
• Vintage Communities
• Warland Investment Co
• Warmington Homes
• Washington Infrastructures
• Willdan Associates
• Wiliam Lyon Homes
• Windsor Pacific, LLC