Oil & Gas Industries
- Manglore Refinery & Petrochemicals Ltd.
- Hindustan Petroleum Corporation Ltd.
- Indian Oil Corporation
- Oil & Natural Gas Corporation
- GAIL India Ltd.
- Sabarmati Gas Ltd.
- Indraprastha Gas Ltd.
Fertilizer Industries
- KRIBHCO
- I F F C O
- G N F C
- Rashtriya Chemicals & Fertilizer ltd.
Pharma & Dairy Industries
- Concord Biotech Ltd.
- Rampex Labs Pvt. Ltd.
- Daystar Environ Techno
- Meril Diagnostics P. Ltd.
Power Industries
- Gujarat State Electricity Corp. Ltd.
- Mettur Thermal Power Station
- Karnataka Power Corp. Ltd.
- Rajasthan Rajya Vidyut Utpadan Nigam ltd.
- Nuclear Power Corp. of India Ltd.
- Bharat Heavy Electricals Ltd.
- Chhatisgardh State
- Power Gen. Corp. Ltd.
- Maharashtra State Electricity Board
- Punjab State Power Corp. Ltd.
- Andhra Pradesh Power Gen. Corp. Ltd
- Telangana State Power Gen. Corp. Ltd
- Tamilnadu Gen. & dIst. Corp. Ltd.
- NTPC SAIL Power Co. Ltd.
- Valuthur Gas Turbine Power Station
- Uttar Pradesh Power Gen Corp. Ltd.
- Aravali Power Co. Pvt. Ltd.
- Department of Atomic Energy
- Heavy Water Plant
- Himachal Baspa Power Company Limited
Defence Organisations
- Hindustan Aeronautics Ltd.
- NAVY
Ship Building & Metal Industries
- Mazagaon Dock Ltd.
- Pipaval Defence & Offshore Engineering Co. ltd.
- Bharat Aluminium Co. Ltd.
- Jindal Stainless Hisar Ltd.
- Jindal Quality Tubular Ltd.
- Jindal Saw Ltd.
- L & T Steel & Heavy Forging Ltd.
OEMs
- Kirloskar Pneumatics Co. Ltd.
- Proflo Systems
- Raksha Polycoats P Ltd.
- Thermax Ltd.