- Anderson Environmental Contracting, LLC
- BakerCorp / United Rentals
- BB&A Environmental
- Blaine Tech Services, Inc.
- Cascade Drilling/Technical Services
- Clear Creek Systems, Inc.
- Clear Water Services, LLC
- Directed Technologies Drilling, Inc.
- GeoSearch
- GHD
- Gregg Drilling and Testing, Inc.
- Historical Information Gatherers, Inc.
- Holocene Drilling, Inc.
- Holt Services, Inc.
- Kennedy/Jenks Consultants
- Layfield Group Ltd.
- MT2 Firing Range Services
- Northwest Linings & Geotextile Products, Inc.
- NRC Environmental Services
- Olympic Environmental Equipment, LLC
- OneBeacon Insurance Group
- Pace National
- Pacific Inter-Mountain Distribution, LLC
- PeroxyChem