Exhibit 32.1

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

      In connection with the Annual Report of SeaBright Insurance Holdings, Inc.
(the "Company") on Form 10-K for the year ended December 31, 2005, as filed with
the Securities and Exchange Commission (the "Report"), I, John G. Pasqualetto,
Chairman, President and Chief Executive Officer of the Company, certify,
pursuant to 18 U.S.C. section 1350, as adopted pursuant to section 906 of the
Sarbanes-Oxley Act of 2002, that:

      (1) The Report fully complies with the requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

      (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company.

Dated: March 29, 2006

                                 /s/ John G. Pasqualetto
                                 -----------------------------------------------
                                 John G. Pasqualetto
                                 Chairman, President and Chief Executive Officer

A signed original of this written statement required by Section 906 has been
provided to SeaBright Insurance Holdings, Inc. and will be retained by SeaBright
Insurance Holdings, Inc. and furnished to the Securities and Exchange Commission
or its staff upon request.