affiliate of Bermuda-based financial reinsurer Centre Re, has appointed the following people to Senior Vice President: Ms Melinda Hamilton , underwriting; Mr. Isaac Mashitz , chief actuary; Mr. Mark D. Mosca , chief underwriting officer; Mr. P. Britt Newhouse , business development; Mr. Peter R. Porrino , chief financial officer; and Mr. John D. Shuck , chief administrative officer.