India
ENGINEERING CONTRACTORS
- Daelim Industrial Co. Ltd
- Indian Oil Corporation Limited
- Reliance Industries Limited
- York India Limited
- Siemens Limited
- Toyo
- Larsen & Toubro
- Gas Authority of India Limited
- Oil and Natural Gas Corporation
- Indian Petrochemicals Corporation Limited (IPCL)
- Punj Lloyd Limited
SPACE/ DEFENCE/ NUCLEAR
- Bhabha Atomic Research Centre
- Nuclear Power Corporation of India Limited (NPCIL)
- Praxair India
- Indian Space Research Organisation (ISRO)
- Indcon Projects and Equipment Ltd
- Air Liquide Engineering India Limited
- Kirloskar Pneumatic Co. Limited
- John Galt International
- York India Limited
- British Oxygen
- Technimont ICB
- DMDE
METALLURGY
- Bharat Aluminium Company Limited
- Jindal Steel Works – Vijaynagar
- Jindal Steel Works – Hisar
- Essar Steel Limited
- Tata Steel Limited
- Steel Authority of India Limited (SAIL)
- SMS Demag Pvt. Ltd.
- Welspun Gujarat Stahl Rohren
- Mukand Limited
PROCESS & POWER INDUSTRY
- Emerson Process Management India Pvt. Ltd.
- Linde Process Technologies India Ltd.
- Inox Air Products Limited
- Lincoln Helios
- Honeywell
- Yokogawa Blue Star Limited
- Forbes Marshall
- Southern Lubrication Private Limited
- VA Tech Wabag
- Bharat Heavy Electricals Ltd. – Hyderabad
- Bharat Heavy Electricals Ltd. – Hardwar
- National Thermal Power Corporation (NTPC)
- Flowserve Sanmar
- Gujarat Alkalies & Chemicals Limited
- UT Pumps & Systems
- VAI Engg & Automation
- Venu Engineering Services
- Asea Brown Boveri limited
- Instrumentation Limited – Kota
- KSB Pumps
- Bharat Pumps & Compressors Limited
- Bharat Heavy Plates & Vessels Limited
- Chemtrols Engineering Limited
RAILWAYS
- Alstom
- Bharat Earth Movers Limited
- BHEL Jhansi
- Bombardier Transportation
- Chittaranjan Locomotive Works
- Diesel Locomotive Works
- Diesel Loco Modernisation Works
- GE Transportation
- Indian Railways Regional Sheds / Workshops
- Integral Coach Factory
- Knorr-Bremse
- Modern Coach Factory
- Wabtec Corporation
CNG
- Tata Motors Pune
- Tata Motors Lucknow
- Minda Impco Limited
- Vanaz Engineers (Eicher)
