Upmanu Lall is the Alan & Carol Silberstein Professor of Engineering, Department of Earth and Environmental Engineering and Department of Civil Engineering and Engineering Mechanics, at Columbia University in New York; Director of the Columbia Water Center, and a Senior Research Scientist at the International Research Institute for Climate & Society, both a part of Columbia University’s Earth Institute. He is a leading expert on hydroclimatology, climate change adaptation, and risk analysis and mitigation. Lall’s research has emphasized hydrology, water resource systems analysis, operations research and stochastic processes with applications to flood/drought risk and uncertainty assessment and the design and operation of water systems. He is concerned with the issue of global and regional water sustainability, and the more general issue of modeling and managing planetary change due to coupled human and natural dynamics. He is developing technical and policy tools for the projection and management of environmental change as part of a quantitative approach to sustainability of earth systems.