Defence

1. Indian Navy
2. Material organisation  - Mumbai
3. Material organisation  - Vizag
4. Directorate of Procurement – New Delhi
5. Naval dockyard – Mumbai
6. Indian ordnance Factories
7. Garden Reach Shipbuilders Ltd, Kolkotta

Power Generation

1. BHEL
2. NTPC

Aerospace & Aeroengines

1. Hindustan Aeronautics Ltd, Engine division
2. Pratt & Whitney, USA/Canada
3. Infotech, Hyderabad
4. Gas turbine Reasearch Establishment

Special Purpose Machines

1. Hinduja Foundries
2. Kirloskar Ferrous industries ltd
3. Ashok Iron works