BSES RAJDHANI/YAMUNA POWER LIMITED
DELHI METRO RAIL CORPORATION(DMRC) 
IRCON INTERNATIONAL LIMITED
SIEMENS LIMITED 
Delhi Transco Limited
Larsen and Toubro Ltd. (ECC and RBU) 
Tata Power Delhi Distribution Limited
RAPID METRO GURGAON LTD. 
KEI INDUSTRIES LTD.