- ADMA-OPCO
- AMNI International
- Anadarko Petroleum
- AR Singh Contractors Ltd
- Arena Energy
- Asian Geos
- Atlantic LNG
- BHP Billiton
- BP
- British Gas
- Bureau of Safety and Environmental Enforcement (BSEE)
- Cantium Energy
- Chevron
- Concepts & Services
- ConocoPhillips
- Cortez Subsea
- Cox Oil
- DeNovo Energy Limited
- DNV-GL
- EMAS
- Energy XXI
- EOG Resources Trinidad
- Exxon
- Fieldwood Energy
- FLUOR
- HESS
- iOGP
- Jacobs Engineering
- Lloyds Register
- LoneStar LNG
- M&H Energy Services
- McDermott
- MMC Oil & Gas
- Noble Energy
- Oceaneering
- OTSL
- PEMEX
- Petronas
- Petrotrin Trinmar Operations
- Point Engineering
- RCI Consultants
- Renaissance Offshore
- Repsol
- SciRisq
- Shell
- SiGED Emirates
- State Service
- TOSL
- Uptown Houston
- W & T Offshore
- Whitney Oil & Gas
- Williams
- Worley Parsons