After completing the Doctor of Medicine course in Community Medicine in 1998, he joined the faculty in the Department of Community Medicine, J.N. Medical College in 1999. He has been awarded a Ph.D. in Community Medicine in 2016. He has been awarded the Fellowship of the Indian Association of Preventive and Social Medicine in 2017. He is teaching undergraduate and postgraduate medical students and has also been involved in the training of medical interns in health programmes for the last 25 years. He is involved in research activities directed toward micronutrient deficiencies, HIV/AIDS, disaster management, and environmental health issues. He has got 154 papers published in national and international journals. He has presented papers at 09 international conferences in Singapore, Bangkok, Colombo, Dhaka, Madrid, Paris, Rome and Sydney and 166 papers in national/state conferences. He has worked with high-risk groups for HIV/AIDS. He is helping children suffering from eye problems especially congenital cataract with support from Kids with Vision, USA. He has been Coordinator/Principal Investigator/ Co-investigator/Supervisor of various prestigious projects of different agencies like UNICEF, Bill & Melinda Gates Foundation, World Learning of USA, Nuclear Power Corporation of India Ltd. (NPCIL), Indian Council of Medical Research (ICMR), Indian Council of Social Science Research (ICSSR), and Ministry of Health & Family Welfare, Govt. of India. He is a life member of various public health organizations. He has authored 09 books on public health issues.