Timothy founded and currently leads the climate change and health program at the World Bank. Since 2015, the program has increased the share of World Bank health lending that considers climate change by 30%, corresponding to more than $1bn for 2018. He has also been a core member of the World Bank One Health program, global ocean program, and others focused on satellite remote sensing and earth observation, fisheries, infectious disease, and nutrition, working throughout Africa, Asia, and the Pacific. Trained as a medical doctor and environmental scientist, he has previously held positions with the Nuclear and Radiation Studies Board of the US National Academy of Sciences, with the World Health Organization’s climate change and health cluster, and in genetic ethics at UCSF. He sits on a number of advisory bodies for organizations addressing climate change, health, or oceans in academia, civil society, finance, and tech. He holds degrees in biology, bioethics, geography, and medicine from Tufts, Harvard, Oxford, and Duke.