FEDERAL
- United States Army Corps of Engineers
- Albuquerque District
- Omaha District
- Sacramento District
- Edwards Air Force Base
- Federal Bureau of Prisons
- Nellis Air Force Base
- Creech Air Force Base
- United States Forestry Service
- Department of the Navy
ENGINEERING FIRMS
- Antea Group
- AECOM
- AMEC
- Conestoga-Rovers Associates
- Conti Federal Services
- Geosyntec
- ETIC Engineering, Inc.
- Stratus Environmental
- Tetra Tech
- URS Corporation
- TRS
COMMERCIAL
- Fed Ex
- USA Petroleum
- IPS Corporation
MAJOR OIL FIRMS
- Conoco Phillips
- Shell
- BP/ARCO
- Mobil
- Chevron
- Thrifty Oil
- Tesoro