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Louis leads the foundation’s programs on water, sanitation, and hygiene (WASH) and cleaner cooking. In addition to managing a portfolio of grants and impact investments, Louis works to advance these sectors through wide-scale systems change. From 2005 to 2013, Louis founded and led the WASH program at the Bill & Melinda Gates Foundation, building a portfolio of more than $400 million, assembling a cross-disciplinary team, and focusing the program on non-piped sanitation. Prior to that, Louis worked for 15 years at International Finance Corporation of the World Bank Group, where he led the environmental finance team from 1997 to 2004. In that capacity, he built a portfolio of over 30 impact investments, ranging from solar power to clean drinking water, totaling $250 million. Louis currently sits on the boards of IRC International Water and Sanitation Centre and the RICE Institute. Louis holds a BA in economics from Yale University and an MBA and MA (development economics) from Stanford University.