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 Quarterly Report of Document Sciences Corporation (the “Company”) on Form 10-Q for the period ended June 30, 2006 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, John L. McGannon, in my capacity as Chief Executive 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: August 11, 2006	/s/ John L. McGannon
	John L. McGannon President and Chief Executive Officer