He is Senior Energy Economist at the Economic Research Institute for ASEAN and East Asia. He has published several books, authored numerous research articles and produced many project reports on resource management policies, energy infrastructure design, and private sector participation in Green Growth. He was invited as a member of the APEC Expert Panel on Green Climate Finance and the ASEAN Panel for promoting climate-resilient growth. He has taught resource management, International cooperation and Development Finance at the University of Tokyo and has speaking engagements at some of the leading international organisations. He obtained his PhD from the University of Tokyo.