- List of Petroleum Companies Worldwide
- Ranhill Worley Parsons Sdn. Bhd.
- Aker Engineering Malaysia Sdn. Bhd
- MMC Oil and Gas Engineering Sdn. Bhd
- Protek Engineers Sdn. Bhd
- Sime Engineering Sdn. Bhd
- Technip Consultant (M) Sdn. Bhd
- Environmental Resourcess Management (M) Sdn. Bhd
- Minconsult Sdn. Bhd
- MMC Amec Sdn. Bhd
- RNZ Integrated (M) Sdn. Bhd.
- MECIP Global Engineers Sdn. Bhd