EXHIBIT 99.1


                    Certification of Chief Executive Officer
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           Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
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                to Section 906 of the Sarbanes-Oxley Act of 2002
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The undersigned, the Chief Executive Officer of SAVVIS Communications
Corporation (the "Company"), hereby certifies that, to his knowledge on the date
hereof:

(a)      the amended Quarterly Report on Form 10-Q/A for the quarterly period
         ended June 30, 2002, filed on the date hereof with the Securities and
         Exchange Commission (the "Report") fully complies with the requirements
         of Section 13(a) or 15(d) of the Securities Exchange Act of 1934: and

(b)      information contained in the Report fairly presents, in all material
         respects, the financial condition and results of operations of the
         Company.


                                                     /s/ Robert A. McCormick
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                                                     Robert A. McCormick
                                                     Chief Executive Officer
                                                     August 15, 2002