Zimperium, mobile data security company, hires Michael Williams, ex-KnowBe4 and former Symantec, as chief marketing officer ... Mythic, AI processor company, taps Taner Ozcelik, ex-Luminar Technologies, also former On Semiconductor and Nvidia, as its new CEO ... Teradata, cloud analytics and data platform for AI, hires Craig-Hallum Capital’s Chad Bennett as senior vice president-investor relations and corporate development ... C5i, AI and analytics company, adds Harvard Business School professor Ananth Raman to its strategic advisory board ... Excellere Partners, private equity firm, promotes Ryan Revolinski to vice president and Jenna Heinemeyer to associate, and hires Mark Sparrow, ex-KSL Capital Partners, as vice president-finance ... Women's Bar Association of the District of Columbia elects Regan Zambri attorney Emily Lagan to a three-year team on its board.