MW Kellog, Lurgi, Fluor Daniel, Lummus, Bechtel, Du Pont, Stone and Webster, Toyo Engineering, Mitsui, Mitsubishi Heavy Industries, Kvaerner Corpn., Chemtech, Daelim, Halder Topsoe, Sanam Progetti, Linde, L’Air Liquide, KTI, Technip, Technimont, BF Goodrich, UOP, ICI, UHDE, Ansaldo SPA, FL Schmidt, Holtech, Jacob H & G, Siemens, Alstom, Babcock including Indian engineering consultants and public sector undertakings like EIL, NTPC, BHEL, SEEPCO CMEC - CHINA, ONGC, IOCL, MECON, PDIL, DESEIN, TCE, L&T and many more.