- CH2M Hill
- E G & G Technical Support Svc
- Epic Energy
- Foster Wheeler Environmental
- IDC
- Intrepid Engineering Svc Inc
- Jason Associates Corp
- Jetseal Inc
- MSE Technology Applications
- Orion Technical Solutions
- Parsons Infrastructure & Tech
- Reliance Testing & Inspection
- Schiess & Assoc Consulting
- Trutech
- URS Corp
