- Aker Solutions Brunei Darussalam
- Aker Solutions Malaysia
- Asiapower Kuwait
- Asiapower Oman
- Asiapower United Arab Emirates
- Bahwan Engineering Oman
- Baker Hughes Singapore
- Baker Hughes Thailand
- Chevron China
- Chevron Philippines
- Chevron Singapore
- Chevron United States of America
- China Petroleum Saudi Arabia
- Conoco Phillips Indonesia
- ExxonMobil Canada
- ExxonMobil Singapore
- Fircroft United Kingdom
- Halliburton Algeria
- Halliburton Australia
- Inpex Corporation Indonesia
- John Wood Group PLC Brunei Darussalam
- John Wood Group PLC Iraq
- KBR United Arab Emirates
- Maersk Philippines
- Monadelphous Australia
- MPH Groupe Qatar
- Murphy Oil Malaysia
- National Oilwell Varco Egypt
- NKA Energy Malaysia
- Occidental Petroleum Qatar
- Petrohorizon Malaysia
- Qatar Petroleum
- Saudi Aramco Saudi Arabia
- Schlumberger United States
- SGS Saudi Arabia
- Weatherford Algeria
- Weatherford Canada
- Weatherford Kuwait
- Weatherford Nigeria
- Weatherford Qatar
- WorleyParsons Bahrain