He was a member of the Scientific Advisory Council to the Prime Minister and also of the Scientific Advisory Committee to the Cabinet set up by successive governments. He has chaired twelve high powered committees set up to look into diverse issues ranging from national auto fuel policy^[21] to overhauling the Indian drug regulatory system & dealing with the menace of spurious drugs.^[22] He was appointed by the Government as Assessor for the One-man Inquiry Commission investigating into the Bhopal Gas Tragedy (1985–86), and as Chairman of the Committee for investigating the Maharashtra Gas Cracker Complex accident (1990–91).^[23]