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NEW YORK, December 20, 2011 – XL Group plc’s (“XL”) (NYSE: XL) North America Primary Casualty group today announced the addition of Jay Lefkowitz to a newly created position as head of US Risk Management. Mr. Lefkowitz is based in New York and reports to Ken Riegler, the recently appointed President of XL’s North America Primary Casualty group.Commenting on the appointments, Mr. Riegler said, “XL continues to attract and retain some of our industry’s most experienced professionals. With a seasoned team and leaders like Jay, we’re well equipped with a superior level of knowledge and underwriting skill to deliver quality coverage and services to our diverse client base. Together we all look forward to building on an impressive reputation and book of business.”Mr. Lefkowitz will direct the group’s US Risk Management team which provides auto liability, general liability and workers’ compensation coverage to US-based businesses.Mr. Lefkowitz joins XL from ACE Risk Management where he most recently served as President of National Accounts, managing all aspects of underwriting, claims, audits and adjustment, staffing, account retention and production. Prior to joining ACE in 1999, he was Vice President of AIG’s Risk Management group where he formed the company’s M&A group which was a multi-line insurance products group catering to Private Equity firms and their portfolio companies. His 20-plus-year insurance career also includes underwriting positions with CNA, Atlantic Mutual and Home Insurance Company. Mr. Lefkowitz earned his undergraduate finance degree from Boston University and an MBA from Pace University.About XL’s Insurance SegmentThe Insurance segment of XL Group plc offers property, casualty, professional and specialty insurance products globally. Businesses that are moving the world forward choose XL as their partner. To learn more, visit www.xlgroup.com/insuranceAbout XL Group plcXL Group plc, through its subsidiaries, is a global insurance and reinsurance company providing property, casualty and specialty products to industrial, commercial and professional firms, insurance companies and other enterprises throughout the world. XL is the company clients look to for answers to their most complex risks and to help move their world forward. Its principal offices are located at No.1 Hatch Street Upper, 4th Floor, Dublin 2, Ireland. To learn more, visit www.xlgroup.com