He carried out his postdoctoral work at the University of Birmingham under Indian National Science Academy and The Royal Society, London fellowship programme. He has participated in various professional training programs held in Danish Hydraulic Institute, Swiss Federal Institute of Technology, University of New Castle, UK and Ruhr University, Germany. Prof. Elango was the Vice President of the International Association of Hydrological Sciences during 2013-19. Presently, he is the President of International Commission of Water Quality of IAHS. He has coordinated a major capacity building programme for the officers of the State’s Water Resources Organisation under ‘The World Bank Funded Hydrology Project’. He has organized four International workshops sponsored by UNESCO’s International Education Programme. He has carried out a number of international research projects. Some of the projects carried out were funded by the European Commission, the British Geological Survey, the Australian Research Council and Russian Academy of Sciences. He has also carried out a number of consultancy projects for major organisations such as Department of Atomic Energy, PWD, MECON, Larson and Toubro, HPCC, Gammon India, Gimpex, etc., He has travelled under academic and research assignments to Australia, Austria, Brazil, Canada, Czech Republic, Denmark, France, Finland, Germany, Hong Kong, Hungary, Japan, Netherlands, Russia, Switzerland, Singapore, Sweden, South Korea, South Africa, Thailand, Tunisia, UK and USA. He has published over 180 research papers and 25 scholars have completed their Ph.D under his guidance until the year 2020.