Chief Underwriting Officer Property & Casualty Middle Market, International P&C, XL Insurance. At XL Insurance, he is responsible for developing and implementing a new department specifically focused on medium-sized businesses. Before moving to XL Insurance in 2008, Maurer worked for nine years at Chubb Europe as a member of the managerial staff. Prior to that, he held various management positions at the Winterthur Group for ten years.