1. AMERICAN GEOTECHNICAL
2. Canterbury Seismic Instruments
3. Deep Excavation LLC
4. Durham Geo-Enterprises Inc.
5. Encardio Rite Group
6. EnTech Engineering
PC
7. Eustis Engineering LLC
8. Fugro
9. GaiaComm
10. GEI Consultants
11. Geocomp Inc.
12. Geotechnical Services Inc.
13. Geotechnics Limited
14. Gouda Geo-Equipment B.V.
15. Haley & Aldrich Inc.
16. Innovative Geotechnical Instrumentation
17. Mine Design Technologies Inc.
18. Monitoring Solution Providers Pte Ltd.
19. Petra Geosciences Inc.
20. Roctest Ltd.
21. S.W.COLE Engineering
Inc
22. SHANNON & WILSON Inc.
23. Systel Instrumentation Service Pvt. Ltd.
24. Tetra Tech Coffey Holding Pty Ltd
25. Wardle Drilling & Geotechnical Ltd.
26. WJ Groundwater Limited
27. WSP Global Inc.