| Govt. Utilities & Govt. Undertaking Companies | Non-Govt. & Multinational Companies |
| Uttar Haryana Bijli Vitran Ltd, Haryana | ABB Ltd. Vadodara / FBD |
| Dakshin Haryana Bijli Vitran Ltd, Haryana | A2Z Maintenance & Engineering Services, Gurgaon |
| BSES Rajdhani Power Ltd, Delhi | Aravali Infrapower Limited, Delhi |
| BSES Yamuna Power Ltd, Delhi | East India Udyog, GZB |
| Purvanchal Vidyut Vitran Nigam Ltd, U.P | Get Power Pvt Ltd, Chennai |
| Paschimanchal Vidyut Vitran Nigam Ltd.U.P | IVRCL Infrastructres & Projects Limited, Lucknow |
| Madhyanchal Vidyut Vitran Nigam Ltd.U.P | Shyam Indus Power (India), Delhi |
| Punjab State Electricity Board | Vindya Telelink Ltd, Delhi |
| Himachal Pradesh Electricity Board | Himachal energy Pvt Ltd, Gurgaon / H.P |
| Chandigarh Electricity Board (U.T) | KLG Systel Ltd, Gurgaon |
| Jammu & Kashmir Power Development Corporation, Srinagar | Yamuna Power & Gases Ltd, Jagadri |
| Reliance Energy Ltd,Mumbai / Lucknow |
| Nagarjuna Construction Ltd, Hyd |
| OMAXE Ltd, Delhi / Lucknow |
| TDI Developers Ltd, Kundli |
| Jaguar Overseas Ltd, Delhi |
| Alstom, Noida |
| Miltary Engineering Service, Ladak / Ambala / J&K |
