S. P. Sinha Ray has been a member of Central Ground Water Board and Central Ground Water Authority, Ministry of Water Resources, Government of India. He has more than 40 years of experience in groundwater exploration, development and management. By virtue of his long association with the country’s apex organization dealing with groundwater resources, he has acquired substantial expertise in the field. Besides having a vast knowledge of the subject within the country, he has also gained insights and know-how in other countries like Algeria, Bangladesh, the USA, Korea, Zimbabwe and Japan. He is a Fellow of West Bengal Academy of Science, a Member, International Association of Hydrogeologists and Emeritus President, Centre for Ground Water Studies, Kolkata.