He is a Professor and Chair of the Water Engineering and Management Program at the Asian Institute of Technology (AIT), Thailand. He is also a Visiting Faculty of the University of Yamanashi, Japan, National University of Laos, and a Research Fellow of the Institute for Global Environmental Strategies (IGES), Japan. His research interests are within the field of hydrology and water resources including, climate change impact assessment and adaptation in the water, integrated water resources management, and groundwater assessment and management.