NEW YORK--(BUSINESS WIRE)--Arch Insurance Group, a member of Arch Capital Group Ltd., announces the following: Arch Insurance Group announced that Shane McCaffrey has been named Senior Vice President and will now head the development of Arch’s Defense Base Act and Foreign Casualty insurance for U.S. based multinationals. Mr. McCaffrey will be based at Arch’s New York City office and will report directly to Rich Stock, Executive Vice President of Arch Insurance Group, who heads Arch’s Constructi