- AGI Engineering
- AREVA Federal Services
- AREVA NP
- CH2MHill Plateau Remediation Company
- DGR Grant Construction
- Energy Solutions
- Fluor Federal Services
- Fluor Hanford Inc.
- HiLine Engineering & Fabrication Inc.
- Intermech Inc.
- Los Alamos National Laboratory
- Marubeni Utility Service, LTD
- Mid-Columbia Engineering
- Monarch Machine and Tool Company
- National Technical Systems
- Non-Entry Systems, LTD
- Olympic Tool & Engineering
- Orbit Industries, INC.
- Paramount Supply
- Parsons C&FI
- PN Services, LLC
- Premier Technology, Inc.
- Puget Sound Pipe & Supply Company
- Savannah River Remediation
- Shaw Global Services, LLC
- Stoneway Electric Supply
- TMR Associates
- Tokyo Electric Power Company
- URS Energy & Construction, INC.
- Washington River Protection Solutions
