Stephanie Singer has assembled, analyzed and explained data for private business, public agencies, campaigns and election oversight. Her public service projects -- such as the VoteVisualizer -- have been funded by the National Science Foundation and the Knight Foundation. Her client list includes the Orange County Registrar of Voters and the nonpartisan nonprofit Verified Voting. In 2019 she joined the faculty of the Hatfield School of Government at Portland State University, where she finds new ways to apply data science to election cybersecurity. From 2012-2016 she served on the Philadelphia County Board of Elections -- including one year as chair -- where she made data freely available, used data analysis to fight unconstitutional burdens on the voting process, and introduced "I Voted Today" stickers to all Philadelphia polling places. She won the post by defeating a 36-year incumbent in a citywide election. Singer co-chaired the statewide Election Reform Committee of the County Commissioners Association of Pennsylvania and is an active member of the national Election Verification Network. Singer studied math and computer science at Yale and Stanford, completed a Ph.D. at New York University and earned tenure from Haverford College. She has written two books on mathematical physics.