Former Regional Director & Scientist, Central Pollution Control Board. Presently associated with IITM, Department of Civil Engineering as Project Advisor to Clean Environment and Planetary Health in Asia (CEPHA), Source apportionment and carrying capacity study for Chennai and Trichy Corporations. Also as Vice President of M/s Envitran Smart Systems Private Limited, IITM Incubation Cell, IIT Madras Research Park, Chennai, Tamil Nadu. Have 35 years of experience in Pollution control activities/regulatory field.