 He was Chairman for the selection of members in S&T area for International Academy of Astronautics (IAA) for five years.He was also co-chair for programme committee for the conduct of International Astronautical Congress in 2007.He has delivered several prestigious guest lectures like, Ramanujam memorial, Vikram Sarabhai memorial, Dr. Srinivasan memorial, APJ Abdul kalam memorial lecture, Dr Subir Kar memorial lecture and many more in prominent Institutions and national conferences.