Nair was a strong presence in the internal co operation in the space science and technology. As the President of the International Academy of Astronautics for 6 years since 2009, he has made significant contribution in organizing international events of the academy. Notable among them are the heads of space agency summit , from 2010 onwards, which was attended by nearly 30 leaders of space agencies. Subsequently two more summits were organized and the main agenda of these sessions were human space explorations, robotic exploration, climate change and disaster management. On the latter topic, three regional conferences were organized with wide participation from all over the world. During this period nearly 600 leading specialists in space science and technology were recognized as Academicians. A large number of regional conferences were organized in addition to nearly 30 percent of events in each of the IAC sessions in various parts of the world. Quality of Publications of the IAA had been strengthened. The impact factor of its journal Acta Astronautica doubled during this period and has achieved the top 8th position in its class of journals. Nair also served as a board member in IAF representing the IAA and has contributed to the organization of IAC during this period. Cooperation among IAA,IAF and IISL was also strengthened.
As Chairman of ISRO, Nair had led the Indian delegation to the UN COPUOUS for several years and has contributed to the organization of UNISPACE- 3 conference at Vienna. Bilateral and multilateral cooperative agreements were signed with nearly 25 countries during his leadership. International co-operation was strengthened with USA, Europe and Russia. The Chandrayaan mission is an unique example of International cooperation in Space Science and Technology. His passion is to popularize Science among school children and to find solutions to common man's problems through the application of science and technology. His wife is Radhakumari who was also an ISRO scientist. They are staying at Thiruvananthapuram. They have two sons -Dileepan and Jayakrishnan and two grand children- Aditya and Narayan.