WR Berkley Corp. has appointed former Chubb Ltd. executive Michelle D. Middleton as president of the Berkley Mid-Atlantic Group to succeed John F. Kearns, who has been named chairman of the operating unit.

Mr. Kearns will remain in an advisory capacity for the group as a whole, WR Berkley said in a statement Monday.

Ms. Middleton most recently served as Executive Vice President and Head of Small and Medium Business Insurance Industry Practice for Chubb. She has over 30 years of commercial property / casualty insurance experience with a focus on domestic underwriting and marketing.

Ms. Middleton will work in Glen Allen, Virginia.