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
COMMERCIAL
- Fed Ex
- USA Petroleum
- IPS Corporation
ENGINEERING FIRMS
Antea Group
AECOM
AMEC
Conestoga-Rovers Associates
Conti Federal Services
Geosyntec
ETIC Engineering, Inc.
Stratus Environmental
Tetra Tech
URS Corporation
TRS
MAJOR OIL FIRMS
Conoco Phillips
Shell
BP/ARCO
Mobil
Chevron
Thrifty Oil
Tesoro