1. 3M Company
2. Aegion Corporation
3. Applus+ Group
4. Asset Integrity Engineering (Fze)
5. Audubon Inspection Solutions LLC
6. Black Hills Corporation
7. DNV AS
8. Dominion Energy Inc.
9. Emerson Electric Co.
10. ENBRIDGE Inc.
11. EnerMech
12. Force Technology
13. General Electric Company
14. H&M Shared Services Inc.
15. Hyundai Steel
16. IKM Gruppen AS
17. Infosys Limited
18. Intero Integrity Services B.V.
19. Intertek Group PLC
20. JAN X-Ray Services Inc.
21. Larsen & Toubro Infotech Limited
22. LIN SCAN
23. Matcor Inc.
24. NDT Global
25. NiGen International L.L.C.
26. NW Natural
27. Pond & Company
28. ROSEN Swiss AG
29. Schlumberger Limited
30. Schneider Electric SE
31. SGS SA
32. T.D. Williamson Inc.
33. Thyssengas GmbH
34. T?V Rheinland
35. USA DeBusk