Assistant to imperial entomologist Agricultural Research Institute, New Delhi, 1941-1943. Professor zoology Fergusson College, Poona, 1943-1946. Entomologist Geigy Insecticides, Bombay, 1946-1948.
Professor entomology, M.A.C.S., Poona, 1948-1950. Assistant director, head entomology department Haffkine Institute, Bombay, 1951-1969. Postgraduate guide, consultant, since 1969.
Member presidium 1st International Congress Snakes, Caracas, Venezuela, 1976. Member government board prevention of water pollution, for wildlife, since 1976. Member expert advisory panel plague World Health Organization, since 1956.
President Society Clean Environment. Honorary secretary Friends of the Trees. Vice president Society Clean Cities.