- All Zonal Indian Railways (South Eastern Railway, Eastern Railway, Western Railway, Central Railway, Southern Railway etc.)
- Diesel Locomotive works, Varanasi. (U.P.)
- Chittranjan Locomotive Works, Chittaranjan, W.B.
- Rail Coach Factory, Kapurthalla, New Delhi
- Integral Coach factory, Chennai,
- Calcutta Port Trust, Kolkata,
- Coal India, Kolkata,
- Bharat Earth Movers, Bangalore,
- Bharat Cooking Coal Ltd., Dhanbad,
- Bharat Heavy Electrical Ltd. Jhansi, U.P.,
- Metro Railway, Kolkata, &
- Others
