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 Annual Report of DDi Corp. (the "Company") on Form
10-K for the year ending December 31, 2002 as filed with the Securities and
Exchange Commission on the date hereof (the "Report"), Bruce McMaster, Chief
Executive Officer of the Company, certify to the best of my knowledge, pursuant
to 18 U.S.C. 1350, as adopted pursuant to 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 result of operations of the Company.


Date: March 31, 2003                      By: /S/    BRUCE McMASTER
                                              --------------------------------
                                                     Bruce McMaster
                                                 Chief Executive Officer

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