S Irudaya Rajan is Chairman of the International Institute of Migration and Development (IIMAD), India and chair of the KNOMAD (the Global Knowledge Partnership on Migration and Development) thematic working group on internal migration and urbanization, World Bank. Earlier, he was a Professor at the Centre for Development Studies, and Chair, Research Unit on International Migration (RUIM), funded by the erstwhile Ministry of Overseas Indian Affairs, Government of India (2006-2016). Dr Rajan is the Founding Editor in Chief of Migration and Development (Taylor and Francis) and the editor of two Routledge series - India Migration Report and South Asia Migration Report.
Rajan has published extensively in national and international journals on demographic, social, economic, political and psychological implications of international migration. Professor Rajan has coordinated eight major large-scale migration surveys in Kerala since 1998 (with K C Zachariah), Goa (2008), Punjab (2009), Tamil Nadu (2015) and instrumental for Gujarat (2011).