Sirius International Insurance Group Ltd. appointed Gene Boxer as executive vice president and group general counsel of Sirius Group. Boxer was most recently global general counsel of Cushman & Wakefield. The company also added Ed Park as senior vice president and group tax director. Park previously was managing director at AIG Portfolio Solutions. In addition, Robert McFadden joined the company as senior vice president and head of casualty in New York, and Steve Simmons joined as senior vice president and property underwriting manager in New York. Previously, McFadden was senior vice president and director of casualty treaty at XL Catlin, while Simmons was senior vice president and senior underwriter at Partner Reinsurance Co. Ltd.