1. Kerala State Productivity Council (KSPC), Eranakulam

2. Ottotractions, Cochin

3. TQ services,  a division of Tata Projects Ltd, Hyderabad

4. BSNL  Thiruvananthapuram (only for Buildings & Data centres)

5. Exergy solutions, Eranakulam

6. Gensol  Consultants Pvt Ltd, Ahmedabad

7. Athul Engineering systems & Energy Consultants, Eranakulam

8. AMSET Energy Systems and Solutions Private Ltd, Tamilnadu

9. Energy& Safety Consultants, Thrissur

10. TERI (The Energy Research Institute)

11. KITCO LTD.(Only for Electrical Energy Audit)

12. APITCO

13. ERDA

14. Saurabh engineering services (Only for Electrical Energy Audit)

15. Enzen Global Solutions Private Limited

16. Power Engineering Consultants (Only for Electrical Energy Audit)

17.Schneider Electric India Pvt Ltd

18.LARSEN & TOUBRO

19.Siri Exergy & Carbon Advisory Services (P) Ltd.

20.Encon Energy Concepts (P) Ltd.

21.MCJ Energy Engineers (P) Ltd.

22.TUV SUD South Asia Pvt Ltd.