Arch Reinsurance Group has promoted William Soares to Chief Executive Officer of Arch Reinsurance Ltd. in Bermuda. A spokesperson said, “Arch Reinsurance Group [Arch Re, Arch] today announced the promotions of William Soares to CEO of Arch Reinsurance Ltd. in Bermuda and Jon Schriber to CEO of Arch Reinsurance Company in the U.S., effective immediately. …