1. AECOM
2. Amentum Services Inc.
3. Black & Veatch Holding Company
4. Brisea Group
5. Clean Earth Inc.
6. Clean Harbors Inc.
7. DEME NV
8. ENTACT
LLC
9. Geo Inc.
10. Golder Associates Corporation
11. HDR Inc.
12. Hepaco
LLC
13. In-Situ Oxidative Technologies Inc. (Isotec)
14. Jacobs Engineering Group
15. Northstar Group Services Inc.