- Amarco Services Sdn Bhd
- Amrtur Corporation Sdn Bhd
- Adinin Works and Engineering Sdn Bhd
- Baker Hughes EHO LTD
- Belait Shipping Co. Sdn Bhd
- Brunei LNG Sdn Bhd
- Brunei Shell Petroleum Co. Sdn Bhd
- CIC Environmental Services Sdn Bhd
- CJ Technical Services
- Daikyo Industrial Gas Sdn Bhd
- Emas Laut
- Emas Offshore Services Pte. Ltd.
- Eversolve Business Services
- ESG Sdn Bhd Halliburton
- Frontier Drilling ASA
- Fugro Marine Services Pte Ltd
- KCA Deutag
- Gulf Asia Solutions
- Halliburton
- Jasra Harrisons
- Joffren Omar SKS
- LFSIA
- Maersk Drilling Services A/S
- Mashhor Group of Companies
- Megalift Sdn Bhd
- MK Johan
- MOC
- Nabors
- Nautika Sdn Bhd
- PTAS
- QAF Oilfields
- Riyan Cameron (B) Sdn Bhd
- Rosnah Yusof and Sons General Trading Company
- Sahid Sdn Bhd
- Sea Drill
- SKSWood
- Dowell Schlumberger
- SPI Transportation & Lifting Services
- SPIE Oil & Gas Services ASP
