Bharat Petroleum Corporation Limited (BPCL) is an Indian government-controlled oil and gas company headquartered in Mumbai, Maharashtra. The Corporation operates two large refineries of the country located in Kochi and Mumbai. The company is India’s 2nd largest downstream oil company and is ranked 275th on the Fortune list of the world’s biggest corporations as of 2019. BPCL ranked 672 in the Forbes 2018 list.

The Power Grid Corporation of India Limited (POWERGRID) is an Indian state-owned Maharatna company headquartered in Gurugram, India and engaged mainly in Transmission of Power. POWERGRID transmits about 50% of the total power generated in India on its transmission network. Its former subsidiary company, Power System Operation Corporation Limited (POSOCO) handles power management for National Grid and all state transmission utilities. POWERGRID also operates a telecom business under the name POWERTEL. Shri Kandikuppa Sreekant serves as the Chairman and Managing Director of the company.

NTPC Limited, formerly known as National Thermal Power Corporation Limited, is an Indian Public Sector Undertaking, engaged in the business of generation of electricity and allied activities. It is a company incorporated under the Companies Act 1956 and is promoted by the Government of India. The headquarters of the company is situated at New Delhi. NTPC’s core business is the generation and sale of electricity to state-owned power distribution companies and State Electricity Boards in India. The company also undertakes consultancy and turnkey project contracts that involve Engineering, Project Management, Construction Management and Operation and Management of Power Plants.

Central Electronics Limitedis a Union Government owned engineering company based in India, with its manufacturing unit located at Sahibabad, district Ghaziabad in the state of Uttar Pradesh.

Central Electronics Limited is a pioneer in India in the areas of solar photovoltaics, ferrites and piezo ceramics. It is among the top producers of single crystalline silicon solar cells in the world.

Mazagon Dock Shipbuilders Limited (MDL) (IAST: Majhagānv Dawk Limiṭeḍ), formerly called Mazagon Dock Limited, is a shipyard situated Mazagaon, Mumbai. It manufactures warships and submarines for the Indian Navy and offshore platforms and associated support vessels for offshore oil drilling. It also builds tankers, cargo bulk carriers, passenger ships and ferries.

The shipyards of MDL were established in the 18th century. Ownership of the yards passed through entities including the Peninsular and Oriental Steam Navigation Company and the British-India Steam Navigation Company. Eventually, ‘Mazagon Dock Limited’ was registered as a public company in 1934. The shipyard was nationalised in 1960 and is now a Public Sector Undertaking of the Government of India.

Indian Oil Corporation Limited (IOCL), commonly known as Indian Oil is an Indian government-owned oil and gas company headquartered in New Delhi. It is the largest commercial oil company in the country, with a net profit of INR 19,106 crore (USD 2.848 billion) for the financial year 2016–17. It ranked 1st in ‘Fortune India 500’ list for the year 2016 and 117th in ‘Fortune Global 500’ list of world’s largest companies in the year 2019. As of 31 March 2017, Indian Oil’s employee strength was 33,135, out of which 16,545 were in the officer cadre. It is India’s largest downstream oil company, with a workforce of more than 33,000 employees, a turnover of Rs.5,06,428 crores and a net profit of Rs.21,346 crores in 2017-18.

Bharat Heavy Electricals Limited (BHEL) owned and founded by the Government of India, is an engineering and manufacturing company based in New Delhi, India. Established in 1964, BHEL is India’s largest power generation equipment manufacturer.

BHEL is engaged in the design, engineering, manufacturing, construction, testing, commissioning and servicing of a wide range of products, systems and services for the core sectors of the economy, viz. power, transmission, industry, transportation, renewable energy, oil & gas, and defence.

It has a network of 17 manufacturing units, 2 repair units, 4 regional offices, 8 service centres, 8 overseas offices, 15 regional centres, 7 joint ventures, and infrastructure allowing it to execute more than 150 projects at sites across India and abroad. The company has established the capability to deliver 20,000 MW p.a. of power equipment to address the growing demand for power generation equipment.

Gail (India) Limited (GAIL) (formerly known as Gail AUTHORITY OF INDIA LTD) is Government of India undertaking company. Gail is the largest state-owned natural gas processing and distribution company in India. It is headquartered in New Delhi. It is a state-owned enterprise of the Government of India, under the administrative control of the Ministry of Petroleum and Natural Gas. It has the following business segments: Natural Gas, Liquid Hydrocarbon, Liquefied Petroleum Gas Transmission, Petrochemical, City Gas Distribution, Exploration and Production, GAILTEL and Electricity Generation. GAIL was conferred with the Maharatna status on 1 Feb 2013, by the Government of India. Only eight other Public Sector Enterprises (PSEs) enjoy this coveted status amongst all central CPSEs. GAIL was listed in the 131st position among India’s most trusted brands according to the Brand Trust Report-2014, a study conducted by the Trust Research Advisory.

Hindustan Petroleum Corporation Limited (HPCL) is an Indian Oil and Natural Gas company with its headquarters at Mumbai, Maharashtra. It has about 25% market share in India among Public-Sector Unit companies (PSUs) and a strong marketing infrastructure. Oil and Natural Gas Corporation, also second promoter of the company (first promotor is The President of India) owns 51.11% shares in HPCL and others are distributed amongst financial institutes, public and other investors. The company is ranked 367th on the Fortune Global 500 list of the world’s biggest corporations as of 2016. HPCL got removed from NIFTY 50 INDEX in March 2019. Recently on 24 October 2019 the company has conferred with Maharatna status.

Hindustan Aeronautics Limited (HAL) is an Indian state-owned aerospace and defence company headquartered in Bengaluru, India. It is governed under the management of the Indian Ministry of Defence.

The government-owned corporation is primarily involved in the operations of the aerospace and is currently involved in the design, fabrication and assembly of aircraft, jet engines, helicopters and their spare parts. It has several facilities spread across India including Bengaluru, Nasik, Korwa, Kanpur, Koraput, Lucknow, Hyderabad and Kasaragod. The HAL HF-24 Marut fighter-bomber was the first fighter aircraft made in India.

The Bhabha Atomic Research Centre (BARC) is India’s premier nuclear research facility, headquartered in Trombay, Mumbai, Maharashtra. BARC is a multi-disciplinary research centre with extensive infrastructure for advanced research and development covering the entire spectrum of nuclear science, engineering and related areas.
OCES stands for Orientation Course for Engineering Graduates and Science Postgraduates
DGFS stands for DAE Graduate Fellowship Scheme for Engineering Graduates and Physics Postgraduates.

West Bengal State Electricity Distribution Company Limited (WBSEDCL) was established in 2007 following the unbundling of the state electricity board of West Bengal and responsible for providing power to 96% of West Bengal with a customer base of more than 1.68 crores across the state. The company has achieved a profit of ₹95.13 crores (US$13 million or €12 million) (PAT) in the fiscal year 2010-11.

The Defence Research and Development Organisation (DRDO) is an agency of the Government of India, charged with the military’s research and development, headquartered in Delhi India. It was formed in 1958 by the merger of the Technical Development Establishment and the Directorate of Technical Development and Production of the Indian Ordnance Factories with the Defence Science Organisation. It is under the administrative control of the Ministry of Defence, Government of India.

With a network of 52 laboratories, which are engaged in developing defence technologies covering various fields, like aeronautics, armaments, electronics, land combat engineering, life sciences, materials, missiles, and naval systems, DRDO is India’s largest and most diverse research organisation. The organisation includes around 5,000 scientists belonging to the Defence Research & Development Service (DRDS) and about 25,000 other scientific, technical and supporting personnel.

Oil and Natural Gas Corporation (ONGC) is an Indian Multinational Crude Oil and Gas Corporation. Its registered office is in New Delhi, India. It is a state-owned enterprise of the Government of India, under the administrative control of the Ministry of Petroleum and Natural Gas. It is the largest oil and gas exploration and production company in the country. It produces around 70% of India’s crude oil (equivalent to around 57% of the country’s total demand) and around 84% of its natural gas. In November 2010 Government of India gave ONGC the Maharatna status.

The Nuclear Power Corporation of India Limited (NPCIL) is an Indian Public Sector undertaking based in Mumbai, Maharashtra. It is wholly owned by the Government of India and is responsible for the generation of nuclear power for electricity. NPCIL is administered by the Department of Atomic Energy (DAE).
NPCIL was created in September 1987 under the Companies Act 1956, “to undertake the design, construction, operation and maintenance of the atomic power stations for generation of electricity in pursuance of the schemes and programmes of the Government of India under the provision of the Atomic Energy Act 1962.” All nuclear power plants operated by the company are certified for ISO-14001 (Environment Management System).

Tehri Hydro Development Corporation Limited (Formerly Tehri Hydro Development Corporation Limited), is a company jointly owned by Government of India and Government of Uttar Pradesh. It was incorporated in July’88 to develop, operate and maintain the Tehri Hydro Power Complex and other Hydro Projects. THDC India Limited is a MiniRatna Category-I Enterprise.

At present the company has four power plants in operation namely Tehri Dam (1000 MW), Koteshwar Dam (400 MW), 50 MW Wind project in Patan (Gujarat) and 63 MW Wind project in Dwarka (Gujarat). In addition, more than 10 projects are under various stages of construction. Tehri PSP (1000 MW) and Vishnugad-Pipalkoti HEP (444 MW) are in advance stage and are expected to commission by 2018. THDCIL has also ventured in to thermal power generation with its 1320 MW Thermal Power project coming up near Dussehera village which is near to Khurja, District Bulandshahr, Uttar

National Aluminium Company Limited, abbreviated as NALCO, (incorporated in 1981) is a Navratna group ‘A’ CPSE having integrated and diversified operations in mining, metal and power under Ministry of Mines, Government of India. Presently, Government of India holds 52% equity of NALCO.

It is one of the largest integrated Bauxite-Alumina-Aluminium-Power Complex in the Country encompassing bauxite mining, alumina refining, aluminium smelting and casting, power generation, rail and port operations.

The Company is the lowest-cost producer of metallurgical grade alumina in the World and lowest-cost producer of Bauxite in the World as per Wood McKenzie report. With sustained quality products, the Company’s export earnings accounted for about 42% of the sales turnover in the year 2018-19 and the Company is rated as 3rd highest net export earning CPSE as per Public Enterprise Survey report.

Steel Authority of India Limited (SAIL) is an Indian state-owned steel making company based in New Delhi, India. It is a public sector undertaking, owned and operated by the Government of India with an annual turnover of INR 66,267 Crore (US$9.32 Billion) for fiscal year 2018-19. Incorporated on 24 January 1974, SAIL has 69,808 employees (as of 01-Feb-2020). With an annual production of 16.30 million metric tons, SAIL is the 20th largest steel producer in the world and the 3rd largest in India. The Hot Metal production capacity of the company will further increase and is expected to reach a level of 50 million tonnes per annum by 2025. Sri Anil Kumar Chaudhary is the current Chairman of SAIL.