Brian Duperreault is former Executive Chairman of the Board of Directors of American International Group, Inc. (AIG).  Brian also previously served as Chief Executive Officer of AIG from 2017 to 2021.

Before joining AIG, Brian was Chairman and Chief Executive Officer of Hamilton Insurance Group (Hamilton) from 2013 to 2017. Hamilton is a Bermuda‐based holding company of property and casualty insurance and reinsurance operations in Bermuda, the U.S. and the UK.

Brian served as 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, Brian held various senior executive positions with AIG and its affiliates from 1973 to 1994.

Brian is a member of the Boards of Saint Joseph's University, CAS (Casualty Actuarial Society), Malteser International Americas, Charter Member of Industry Leaders Council (ILC), IESE Business School and Emeritus Member of the Bermuda Institute of Ocean Sciences (BIOS), and Executive Chairman of Mereo Advisors.

He is a former Director of Johnson Controls, the former Chairman of the Board of Overseers of the School of Risk Management of St. John’s University, New York and Chairman Emeritus of Blue Marble Microinsurance.

Brian holds a bachelor’s degree in mathematics from St. Joseph’s University.

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