EXHIBIT 99.2


                            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 quarterly report of MedSource Technologies, Inc. on
Form 10-Q for the period ended December 29, 2002 as filed with the Securities
and Exchange Commission on the date hereof, I, William J. Kullback, Senior Vice
President -- Finance and Chief Financial Officer of MedSource certify, pursuant
to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

     (1)  such 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 such report fairly presents, in all
          material respects, the financial condition and results of operations
          of MedSource.

Dated:  February 12, 2003

                                     /s/William J. Kullback
                                     ---------------------------------------
                                     William J. Kullback
                                     Senior Vice President -- Finance and Chief
                                     Financial Officer