Engineers India Limited
Indian Oil Corporation Ltd., Haldia Refinery / Panipath Refinery
 Larsen & Toubro Ltd.
 KTI India Ltd. (KTI Technip)
Punj Lloyd Ltd.
 Dalal Engineers & Consultants Ltd. (Dalal Mott McDonalds)
 Chemtex Engineering of India Ltd./Indo Rama synthetics.
 Triune Projects Pvt. Ltd.
 Simon India Ltd.
 GeoEnpro Petroleum Ltd.
ABB Lummus Heat Transfer B.V.
Western Oil Co.
GSP & Co. Ltd.
Western India Industrial Technologies Ltd
Western India Petroleum Ltd.
RITES Cargill India Ltd.
Artson Engineering Ltd.
Woodlands Instruments Pvt. Ltd
Tata Energy Research Institute
Jubilant Organosys Ltd. (Vam Organics)
ISGEC John Thompson Ltd.
Kamal Engineering Corporation
India Glycols Ltd.
Geopetrol India