Dr.P. Dharmalingam has 30 years of experiences from National productivity council in the field of Energy audit and Conservation and conducted over 400 energy audit, water efficiency, renewable energy, waste minimization assignments in industrial & commercial sector and organised 250 Seminars/workshops on Energy Efficiency and Conservation as a team leader in over 7 countries including the United States of America, Iran, Nepal, Taiwan, Japan, Fiji. He was holding the position of Director& head NPC Chennai and controller of energy auditor Exam. His professional qualification is Accredited energy auditor by BEE, GOI, Certified Measurement & Verification Professional ® (CMVP), ISO 50001 lead auditor and Trainer in Green building initiatives. He is the lead author of BEE Guide Books on national certification for energy auditor Exam in India and established Centre of Excellence for Training in Energy Efficiency (CETEE) at NPC Chennai with Indo-Japan cooperation which is one of the unique training facilities for practical training in 2010. He has been awarded as the ' Energy Professional Development Asia Subcontinent Region Award 2017' by India chapter of AEE, the USA for outstanding accomplishments in training and development of energy engineers and managers.