He has held several prestigious positions in India and abroad like, Honorary Professor, Indian Institute of Technology (IIT), Kanpur; Honorary Professor for Life, University of Delhi, Delhi ; Visiting Professor, Panjab University, Chandigarh; IBM India Fellow, Thomas J. Watson Research Centre, New York; Visiting Professor, Univ. of Tokyo; Technical Univ. Darmstadt and Sr. Visiting Scientist at PTB, Braunschweig.
He also has several honours and awards to his credit like, INSA Jawaharlal Birth Centenary Visiting Fellowship 2010, S.K. Mitra Birth Centenary Gold Medal of Indian Science Congress Association 2007, Member, External Review Panel of International Council for Science (ICSU), President, the Association of Academies and Societies of Sciences in Asia (AASSA), Co-Chair IAP for Science, the Global Network of Science Academies; President, ICSU-CODATA etc.