To expand its excess casualty business globally, the
XL says Seib will report to Seraina Maag, CEO of XL's North America P&C insurance group. Seib will also manage XL's global excess casualty business with underwriting operations in New York, Bermuda, Dublin, London and Toronto, as well as U.S. field operations in Boston, Chicago, Los Angeles and San Francisco.
Seib joins XL from