Duperreault's career spans 40 years. He was president and chief executive officer of Marsh & McLennan Companies from 2008 to 2012. Before joining Marsh, he served for four years as non-executive chairman of ACE Limited, a global insurance and reinsurance company, CEO of ACE Limited from October 1994 through May 2004, and as the company's president from October 1994 through November 1999.
Prior to joining ACE, Duperreault served in various senior executive positions with AIG and its affiliates from 1973 to 1994.
Duperreault is chairman of Attune, a data-enabled company established by Hamilton Insurance Group, AIG and Two Sigma. He is the chairman emeritus of Blue Marble Microinsurance and former chairman of the board of overseers of the School of Risk Management of St. John’s University, New York.
American International Group, Inc. – also known as AIG – is an American multinational insurance corporation with more than 88 million customers in 130 countries. AIG companies employ over 64,000 people in 90 countries. The company operates through two segments: AIG Property Casualty and AIG Life and Retirement. AIG Property Casualty provides insurance products for commercial, institutional and individual customers. AIG Life and Retirement provides life insurance and retirement services in the United States. It also focuses on mortgage guaranty operations, global capital markets operations, direct investment and retained interests.