Programme specialist at the UNESCO Office in New Delhi, responsible for  Ecological and Earth Sciences,  World Heritage Biodiversity and natural heritage programmes and is also focal point for the UN Decade for Education for Sustainable Development (DESD).  He has over 30 years of experience of working with the academic institutions, voluntary sector, Government and international organizations. He has a distinguished academic career with Doctorate in Ecology and recipient of  many awards and honours including the  Indian National Science Academy Medal presented by Mrs Indira Gandhi, then Prime Minister of India in January 1984. He has travelled widely and has been visiting fellow at many European and US universities and academic institutions. He has Published over 100 research/technical papers / popular articles and 11 books.