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Brian Duperreault

President and Chief Executive Officer

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 (MMC) from 2008 to 2012. Before joining MMC, 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 held 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. 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 American Insurance Association, the Bermuda Institute of Ocean Sciences (BIOS), Johnson Controls, Partnership for New York City, the Geneva Association and Saint Joseph's University.