Member, Rajya Sabha, since 1982. Member, Committee on Petitions, Rajya Sabha, 1984-1985. Member, Committee on Rules, Rajya Sabha, 1986-1987.
Member, House Committee, Rajya Sabha, since 1988. Professional career: teacher, distinguished in the field of Chemistry. Associated with Indian Council of Medical Research and Indian Academy of Science.
Prof, and Head of Department of Chemistry, Lady Braboume College, Calcutta, 1940-1954. Honorary Lecturer, Department of Pure Chemistry, Calcutta University, 194453. Reader in Chemistry, University College of Science, Calcutta University, 1954-1961.
Khaira Prof, of Chemistry, Calcutta University, since 1962. Dean of Faculty of Science, Calcutta University, 1969-1977. Head of Department of Pure Chemistry, Calcutta University, 1969-1980.
Project Co ordinator, Special Assistance Programme ‘Chemistry of Natural Products’, Department of Pure Chemistry, since 1972. Chairman, Board of Directors, Calcutta Chemical Company Limited, Calcutta. Chairman, Chemical Research Committee of CSIR, 1973-1975.
Convener, Chemistry Panel, UGC, 1980-1982. Principal Coordinator, Regional Institute (Ayurveda) West Bengal, under Union Health Ministry. Sisir Kumar Mitra Lectureship of Indian National Science Academy, New Delhi, 1984.
Santanu Memorial Lectureship, 1987. Programme Co-ordinator, Centre of Advanced Studies on the Chemistry of Natural Products, University of Calcutta, 1985-1990. Member; SIGMA XI, United States of America.
Indian Chemical Society. Indian Association, for the Cultivation of Science (and member of the Council). Council of Indian Science Congress Association.
Chemical Society, London. Council, Calcutta University. Indian National Science Academy.
Editorial Board, Indian Journal of Chemistry. National Commission, United Nations Educational, Scientific and Cultural Organisation, since 1982. Review Committee, Central Universities in India, 1982-1983.
Board of Directors, Organon (research centre), Calcutta, since 1983. Governing Body, National Chemical Laboratories (CSIR), Pune. Central Advisery Board of Education, 1983-1984.
Committee on DSA/CAS constituted by UGC, 1985. Chemistry Panel, UGC, constituted in 1985. Board of Directors, Infar (Organon), 1985.
Executive Council, Vishwa Bharati. Executive Council, Jadavpur University. Executive Council, Burdwan University.