Maharatna ONGC is the largest crude oil and natural gas Company in India, contributing around 70 per cent to Indian domestic production. 

Engineers India Ltd (EIL) is a leading global engineering consultancy and EPC company. principally focused on the oil & gas and petrochemical industries.

The story of Oil India Limited (OIL) traces and symbolises the development and growth of the Indian petroleum industry.

HPCL is a Navratna Status, and a Forbes 2000 and Global Fortune 500 company. Incorporated as a company under the Indian Companies Act 1913.

Mangalore Refinery and Petrochemicals Limited (MRPL) is a schedule ‘A’ Miniratna, Central Public Sector Enterprise (CPSE) under the MoP&NG.

Founded by two Scotsmen, George Stephen Balmer and Alexander Lawrie, in 1867 in Kolkata, India, Balmer Lawrie & Co. Ltd. started as a Partnership Firm on 1 February 1867

Gail Limited is the largest state-owned natural gas processing and distribution company in India. It is headquartered in New Delhi.

India’s ‘best performing’ Maharatna PSU becoming a Fortune 500 oil refining, exploration and marketing conglomerate.

Numaligarh Refinery Limited (NRL) has been conceived as a vehicle for speedy industrial and economic development of the region.