1. Oil & Natural Gas Corporation Limited (ONGC)
2. Oil India Limited
3. North Eastern Electric Power Corporation Limited (NEEPCO)
4. PWD Arunachal Pradesh
5. PWD Meghalaya
6. Army Engineers Regiment
7. Star Cement Limited
8. Dalmia Cement Bharat Limited
9. Meghalaya Cement Limited
10. Coastal Projects Limited
11. ABCI Infrastructure Private Limited
12. Bhartia Infraprojects Limited
13. Lafarge Umiam Mining Private Limited
14. Madhucon Projects Limited
15. Nayak Infrastructure Private Limited
16. ECI Engineering & Construction Company Limited
ETC.