Vice-President, AASA (The Association of Academies of Sciences in Asia)

Senior & Honorary Associate, the Abdus Salam International Centre for Theoretical Physics, Trieste, Italy

Fellow, Islamic World Academy of Sciences (IAS), Jordan

Fellow, Bangladesh Academy of Sciences

Fellow, Bangladesh Physical Society

Fellow, Bangla Academy (the most prominent cultural organization in Bangladesh)

Fellow, Bangla Academy (the most prominent cultural organization in Bangladesh)

Life Member, Asiatic Society of Bangladesh.

Life Member, Bangladesh Mathematical Society

General Secretary of BASSP (Bangladesh Association of Scientists and Scientific Professions);

1978-1981 Member, National Council of Science and Technology (NCST), Govt. of Bangladesh.

Member, PUGWASH Group

Member, American Physical Society

Former Member, Board of Governors of the Bangladesh Museum of Science & Technology.

Member, Regional Committee of ICSU (International Council for Science) for Asia and the Pacific

Council Member, FASAS (Federation of Asian Scientific Academies and Societies)

Executive Member, InterAcademy Panel (IAP) on International Issues (2003 - 2009).