- Olympus Corporation
- GE Measurement and Control
- YXLON International GmbH (Comet Holdings AG)
- Team Inc.
- Applus Services SA
- Mistras Group Inc.
- SGS Group
- Fujifilm Corporation
- Bureau Veritas S.A.
- Nikon Metrology NV
- Intertek Group PLC.
- Acuren Inspection Inc.
- T?V Rheinland AG
- Magnaflux Corporation