In 2003, he brought the first successful lawsuit against a voting system manufacturer—Diebold Election Systems—for misrepresenting the security capabilities of its product. He was co-founder and co-director of Voter Action, a nonprofit that sued to block the use of paperless touchscreen voting systems in California, Arizona, New Mexico, Colorado and Pennsylvania in 2005 and 2006. From 2007 to 2014, he served as California’s Deputy Secretary of State for Voting Systems Technology and Policy. He currently serves on the Advisory Board of Verified Voting.