Rail Coach Factory, Kapurthala
Integral Coach Factory, Chennai
Modern Coach Factory, Raebareli
Central Railway
Northern Railway
North Central Railway
North Eastern Railway
Northeast Frontier Railway
North Western Railway
Eastern Railway
East Central Railway
East Coast Railway
Southern Railway
South Central Railway
South Coast Railway
South Eastern Railway
South East Central Railway
South Western Railway
Western Railway
West Central Railway
Rail Vikas Nigam Limited
Rail India Technical and Economic Service Limited (Rites)
Bharat Heavy Electricals Limited
Delhi Metro Rail Corporation
Larsen & Toubro Limited
Tata Projects Limited
Sterling and Wilson Pvt. Ltd.
BCPL Railway Infrastructure Limited
Kalpataru Power Transmission Limited
KEC International Limited
Shyam Indus Power Solutions Private Limited
Zetwerk Manufacturing Businesses Private Limited
R.S. Infraprojects Private Limited
VIKRAN Engineering & Exim Private Limited