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Brian Duperreault is President, Chief Executive Officer and a Director of American International Group, Inc. (AIG). Prior to assuming this role in May 2017, he was Chairman and Chief Executive Officer of Hamilton Insurance Group, a Bermuda-based holding company of property and casualty insurance and reinsurance operations in Bermuda, the U.S. and the UK.
Mr. Duperreault was President and Chief Executive Officer of Marsh & McLennan Companies from 2008 to 2012. Before joining Marsh, he served for two years as non-executive Chairman of ACE Limited, an insurance and reinsurance company, and as CEO of ACE from 1994 through 2004.
Prior to joining ACE, Mr. Duperreault served in various senior executive positions with AIG and its affiliates from 1973 to 1994.
Mr. Duperreault is Chairman of Attune, a data-enabled company established by Hamilton Insurance Group, AIG and Two Sigma, and Chairman of the Board of Directors of Blue Marble Microinsurance. He is the former Chairman of the Board of Overseers of the School of Risk Management of St. John’s University, New York.
Mr. Duperreault is a member of the Boards of the International Insurance Society, the Insurance Information Institute, the Bermuda Institute of Ocean Studies (BIOS), Johnson Controls, and Saint Joseph’s University, Philadelphia, Pennsylvania.