He (Ph.D. (London) 1963) has taught algal biotechnology, microbial and molecular genetics, and other aspects of modem biology to students at several universities, including Bihar, Gorakhpur, Udaipur, Himachal Pradesh and Banaras. A fellow of all the three premiere science academies of India, Professor Kumar was Coordinator of the multi-faculty Biotechnology Programme at Banaras Hindu University from 1989 to 1991. He has widely travelled and lectured in many countries and has held visiting professorships at Nara Women's University, Japan, and Philipps University, Germany. He has published 150 research papers and twelve books in diverse areas, including Molecular Biology and Biotechnology, and General Ecology, widely acclaimed books, published by 'Vikas'.