- Directorate General of Hydrocarbons
- Ministry of Petroleum & Natural Gas
- Oil Industry Safety Directorate (OISD)
- Centre for High Technology
- Oil and Natural Gas Corporation Limited
- Oil India Limited
- GAIL (India) Limited
- Indian Oil Corporation Ltd
- Vedanta Limited
- Reliance Industries Limited
- Gujarat State Petroleum Corporation Limited
- Hindustan Oil Exploration Company Limited