Dennis Chookaszian was Chairman and CEO of CNA Insurance Companies from 1992 until 1999. He is currently a director of the CME Group, which owns the Chicago Board of Trade and three other exchanges, and serves on the board of Career Education Corporation, defense contractor Maxar Technologies, Inc., and Prism Technologies Group, Inc. He has served on over 13 publicly traded boards, and 50 private and non-profit boards. He is a frequent speaker and moderator at the National Association of Corporate Directors, and teaches corporate governance at the University of Chicago’s Booth School of Business and at the Cheung Kong Graduate School of Business in Beijing, China.