EXHIBIT 99.1





CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 1350 OF CHAPTER 63
                      OF TITLE 18 OF THE UNITED STATES CODE


I, Jonathan P. Ward, the Chief Executive Officer of The  ServiceMaster  Company,
certify that (i) the Quarterly Report on Form 10-Q/A for the quarter ended March
31, 2002,  fully  complies  with  requirements  of Section 13(a) or 15(d) of the
Securities Exchange Act of 1934 and (ii) the information  contained in such Form
10-Q/A fairly presents,  in all material respects,  the financial  condition and
results of operations of The ServiceMaster Company.




                            /S/ JONATHAN P. WARD
                            ---------------------
                            Jonathan P. Ward
                             Chief Executive Officer
                            May 13, 2003


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














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