Radtasiri oversees the Water and Energy for Food (WE4F) program in South and Southeast Asia, which has provided 90+ technical assistance and mobilized $131+ million in investments for nearly 40 innovators. Prior to joining WE4F, he was part of Agoda, New Energy Nexus, USAID’s Green Invest Asia and Environmental Resources Management, where he focused on clean energy, sustainable agriculture, climate finance, public policy, and startup acceleration. He also co-authored the Asian Development Bank (ADB)'s Inclusive Green Growth Index (IGGI).