· BHARAT HEAVY ELECTRICALS LIMITED (PEM,TBG, ISG, TRICHY, EDN, BAP,RMSG)
· POWER GRID CORPORATION OF INDIA LIMITED
· THYSSENKRUPP INDUSTRIES
· DRIPLEX WATER ENGINEERING LIMITED
· DEEJAY SYSTEM CONSULTANTS PVT. LTD.
· ENMAS GB POWER SYSTEMS PROJECTS LIMITED
· LARSEN & TOURBO LIMITED.
· N.T.P.C (LODGE COTTRELL INDIA PVT. LTD.)
· MEGA ENGINEERING & INFRASTRUCTURE LIMITED
· STERLING & WILSON LIMITED
· JINDAL STEEL & POWER LIMITED
· JITF WATER INFRASTRUCTURE LIMITED
· KIRLOSKER BROTHERS LIMITED
· TESLA TRANSFORMERS LIMITED
· HINDUSTAN NEWSPRINT LIMITED
· MACO CORPORATION (INDIA) PVT. LTD.
· GENERAL MECHANICAL WORKS PVT. LTD.
· McNALLY BHARAT ENGINEERING COMPANY LIMITED