Exhibit 32.2

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Joseph F. Fisher, Executive Vice President and Chief Financial Officer of
Platinum Underwriters Holdings, Ltd., hereby certify to the best of my knowledge
and belief that this Annual Report on Form 10-K/A fully complies with the
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934
(15 U.S.C. 78m(a) or 78o(d)) and that the information contained in this Annual
Report on Form 10-K/A fairly represents, in all material respects, the financial
condition and results of operations of Platinum Underwriters Holdings, Ltd.

September 20, 2005                      /s/  JOSEPH F. FISHER
                                        ----------------------------------------
                                        By: Joseph F. Fisher
                                        Executive Vice President and Chief
                                        Financial Officer