*Lecturer, 1952–53; assistant professor, 195658, Department of Chemistry, Dhaka University
*Professor, Department of Chemistry and Applied Chemistry, Rajshahi University, 195890
*Nuffield Fellow, Cambridge University, U.K. 196062
*Dean, Faculty of Science, Rajshahi University, 1972
*Commonwealth Senior Fellow, Cambridge University, U.K. 197374
*Member, University Grants Commission (UGC), 197476
*Vice Chancellor, University of Dhaka, 197683
*Fellow of Bangladesh Academy of Sciences, 1979 
*Asia Foundation Fellowship, 1984
*President, Bangladesh Chemical Society, 198486
*Senior Advisor in Basic Sciences, UNESCO, New Delhi, 198590
*University of Asia Pacific, Dhaka, 199596
*President, The Rajshahi University Teachers Association
*Provost, Abdul Latif Hall, Rajshahi University
*Senior Researcher, American Association for the Advancement of Science Washington D.C.