Hamilton Insurance Group Ltd. has announced the appointment of former American International Group executive, Seraina Maag, to oversee its operation in the US. Maag will report to Brian Duperreault, Hamilton chief executive officer. She will replace Bob Deutsch, the chief strategy officer who adopted the additional role of acting US CEO following the departure of Conan Ward last year. Hamilton has grown in the US and abroad as it looks to underwrite more efficiently than its competitors by utilising big data and technology. Duperreault formed a partnership this year with AIG and Two Sigma to develop services to small businesses. Hamilton appointed Maag to develop the rest of property-casualty operations in the US. Duperreault said, “We can turn our attention to the rest of the US P&C market as we work with Seraina to build out Hamilton’s US platform”. Maag joined AIG in 2013 rising to oversee regional operations and was a member of the firm’s management team. She is a director at Credit Suisse Group AG and previously ran North America property & casualty at XL Group Plc.