XL Group’s reinsurance operations are expanding their footprint in the US with the opening of offices in Philadelphia and Dallas, Texas.The office will be led by Dean Wolfe who was recently promoted to western regional manager of XL's newly created property facultative western region. The Philadelphia office will be led by senior underwriter Margaret LoSapio.Mr Wolfe, who has more than 15 years of industry experience including seven years in XL's Atlanta, Georgia office, will be responsible for XL's reinsurance underwriting operations in Dallas, Texas and Walnut Creek, California. He reports to Kip Walker, XL managing director and manager of property facultative reinsurance operations, who is based in Atlanta.Ms LoSapio, who has been with XL since 2007 and reports to William Rosa, eastern region manager for XL's reinsurance property facultative division, is responsible for helping to grow the Property Facultative book of business by underwriting national and global property accounts.