Mel Taub was Corporate Technology Officer (CTO) for CitiGroup, where he chaired the CitiGroup Information Technology Leadership Council, until his retirement. Mel was previously Chief Information Officer (CIO) for CitiGroup Global Corporate and Investment Bank, Senior Executive Vice President and CIO for Salomon Smith Barney, and held senior executive positions with Merrill Lynch, EF Hutton, and Shearson Lehman during his career on Wall Street. He currently advises the FBI and National Counter-Terrorism Center on their technology strategies and initiatives. He holds an MS in Operations Research from New York University.