As Executive Director of Save The Bay, David Lewis has been San Francisco Bay's top advocate for more than 15 years. Under his leadership, Save The Bay stopped San Francisco International Airport's plan to pave more of the bay for runways, and has taken on industry giants Cargill Inc. and the American Chemistry Council. He testified before Congress on oil spill prevention and restoring Bay wetlands to combat the impacts of climate change. Lewis was born and raised in the Bay Area, and previously worked for nuclear arms control in Washington, D.C., including in the U.S. Senate, and on election campaigns across the country. 

Lewis holds a B.A. in politics and american studies from Princeton University and is still trying to catch up to his daughters on the ski slopes.