Exhibit 99.1 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 Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 on Form 10-Q of DA Consulting Group, Inc. (the "COMPANY") for the period ended June 30, 2002, as filed with the Securities and Exchange Commission on the date hereof (the "REPORT"), I, Virginia L. Pierpont, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Sec.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, as amended; and 2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. /s/__________________________________ Name: Virginia L. Pierpont Title: President & Chief Executive Officer Date: August 9, 2002 16