Exhibit 99.1


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


In connection with the Quarterly Report of Document Sciences Corporation (the
"Company") on Form 10-Q for the period ended September 30, 2002 (the "Report"),
as filed with the Securities and Exchange Commission on the date hereof, I, John
L. McGannon, in my capacities as Chief Executive Officer and Chief Financial
Officer of the Company, hereby 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)     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: October 31, 2002                /s/ John L. McGannon
       ----------------                -----------------------------------------
                                       John L. McGannon
                                       President, Chief Executive Officer and
                                       Chief Financial Officer