• Engineers India Limited
• UHDE India Limited
• Jacob H&G Limited
• Kvaerner Powergas India Limited
• Toyo Engineering Limited
• Linde - West Germany

• Tecnimont ICB India Limited
• Dalal Mott McDonald
• Project Development India Limited
• Tata Consultant Engineers
• Chemtex Engineering Ltd.
• Monsanto , U.S.A.

1.   Pharma Industries: 

• Ranbaxy Laboratories Ltd.
• DSM Anti-Infectives India Ltd.
• Max GB
• Aventis Crop science
• Hochest Pharmaceuticals Ltd.
• Lupin Laboratories Ltd.

2.   Petrochemicals & Refineries: 

• Indian Oil Corporation Ltd. -Panipat/Haldia/Gauhati/Vadodara
• Kochi Refineries
• Hindustan Petroleum Corpn.Ltd. - Vaizag
• Bharat Petroleum Corporation Ltd. Mahul, Mumbai
• Reliance Petrochemicals Industries - Hazira
• Narmada Chematur Petrochemicals - Bharuch
• Indian Petrochemicals Corp.Ltd. Baroda/Nagothane