- A. Hak
- ABB Lummus Global, Inc.
- Alliance Maritime Training (now Randy Smith Training)
- Aker Solutions
- ASME - IPTI
- BAE Systems (formerly Stewart & Stevenson Services Inc.)
- Baker Energy
- Baker Hughes
- Baker Oil Tools
- Baker Petrolite
- BHP Billiton
- Bluewater – Offshore
- Boeing Company
- BP
- BP Alternative Energy
- Brown & Root Services
- Cameron
- Celerity3 Engineering
- Cheniere
- Chevron
- Comerica Bank
- ConocoPhillips*
- Consulate of Canada (Houston)
- Crystaphase
- Decision Strategies
- Doris, Inc.
- Dow
- DTC International
- Dynegy
- EnerSys Corporation
- Equilon*
- ExxonMobil
- Fluor*
- FMC Technologies, Inc.
- Hess
- Huntsman
- International Association of Drilling Contractors (IADC)
- Intermoor
- Interstate Oil and Gas Compact Commission (IOGCC)
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- J P Kenny
- KBC Advanced Technologies
- KBR
- Luis Auto Colors
- Ocean Drilling Program
- Oceaneering
- OMRON-IDM Controls
- OXY
- Panhandle Energy
- Parker Drilling
- PDVSA
- Premcor*
- Premium Drilling
- Pride International
- Process Consulting Services
- Raytheon
- Revention
- Riskbytes
- Shell
- Skaugen Petro Trans
- Smith Services
- SNC Lavalin Constructors, Inc.
- Southern Union Gas
- Sterling Bank*
- Stress Engineering Services
- Stress Subsea
- SunStone Corporation
- Superior Well Services
- Sysco
- T.C. Computer Services, Inc.
- Technip (formerly Aker Engineering)
- TNK-BP
- Unidynamics
- US Oncology
- U. S. Army Corp of Engineers
- Uson L.P.
- Vetco Gray
- Warner Brothers
- Webb, Murray & Associates
- Wild Well Control, Inc.
- Williams*
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