Arch Insurance Group, a member of Arch Capital Group Ltd., has made the following senior management changes:

John Mentz has been appointed president of Arch Insurance Group, and will report directly to David McElroy, the chairman and chief executive officer of Arch Worldwide Insurance Group. In this new role, Mr. Mentz assumes the direct management responsibility for all Arch U. S. underwriting divisions. He joined Arch in October of 2002 as executive vice president of construction. In his most recent role, in addition to construction he had ultimate responsibility for national accounts casualty, alternative markets, high excess comp, and lenders products. Prior to Arch, he served in a variety of senior management positions with Zurich and the St. Paul. He is a fellow of the Casualty Actuarial Society.

Michael Price has been appointed executive vice president and chief underwriting officer of Arch Insurance U.S. reporting directly to Michael Murphy, the company's vice chairman. Mr. Price joined Arch in 2009 as senior vice president of executive assurance. In that role he was responsible for executive assurance's growth and middle market, alternative asset protection, and financial institution underwriting units, and for the overall division's product development, operations, and systems deployments. Most recently, he was senior vice president of operation for Arch U.S., where he was responsible for executive reporting, business process optimization, and business systems integration for Arch Insurance's U.S. underwriting operations, reporting to Dennis Brand, Arch's chief administrative officer.