- Abbott Medical
- Abraxis
- Acta Laboratories
- Adam Nutrition
- Advanced Sterilization
- Advanced Technologies
- Alacer Corp.
- Allergan
- Amgen
- Baxter Health Care
- Baxter Hyland Division
- Baxter Scientific
- Beckman Coulter
- Cal Poly Foundation
- Cal State Fullerton
- Cal State Long Beach
- Cal State Los Angeles
- California Clinical Trials
- Cal-Tech
- Cedars Sinai Hospital
- Celgene
- Chevron
- Eaton Corporation
- Fisher Scientific-ISD
- Fountain Valley Regional Hospital
- Harbor UCLA
- Hema Care
- Hollywood Community Hospital
- Howard Hughes UCLA
- Hughes Space & Communication
- Hunt Wesson
- ICN Bio Medical
- Irvine Medical Center
- Jafra Cosmetics
- John Wayne Caner
- Kaiser
- Kraft Foods
- L.A. Sanitation District
- L.A. Vector Control
- Loma Linda Hospital
- Long Beach Memorial Hospital
- Martin Luther King Hospital
- Medtronic
- Mission Hospital
- Montclair Medical Center
- Natel Engineering
- National Genetics
- Norris Cancer Center
- Northridge Hospital
- Northrop Grumman
- Occidental College
- Orange County Clinical Trials
- Quality Testing
- Quest/Smith Kline Beecham
- Raytheon
- Riverside County Department of Health
- South Coast A.Q.M.D.
- Southern California Coastal Water Research Project
- Southern California Edison
- SpaceX
- St. Jude Hospital
- University of California
- University of California, Davis
- University of California, Irvine
- University of California, Irvine Medical
- University of California, Los Angeles
- University of, California Riverside
- University of California, San Diego
- University of California, Santa Barbara
- USC Hospital
- USC L.A. County Hospital
- VA Long Beach Hospital
- VA Medical Center Westwood
- VA Sepulveda
- VWR
- Watson Laboratories
- West Coast Analytical
- West Coast Clinical Trials
- Western Medical Center