EXHIBIT 99.1


                    CERTIFICATION OF CHIEF EXECUTIVE OFFICER
                                   PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


     I, Moshe BenBassat, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly
Report of ClickSoftware Technologies Ltd. on Form 10-Q/A for the quarter ended
March 31, 2001 fully complies with the requirements of Section 13(a) or 15(d) of
the Securities Exchange Act of 1934 and that information contained in such
Quarterly Report on Form 10-Q/A fairly presents in all material respects the
financial condition and results of operations of ClickSoftware Technologies Ltd.


                                    By:    /s/ MOSHE BENBASSAT
                                           -------------------
                                    Name:  Moshe BenBassat
                                    Title: Chairman and Chief Executive Officer





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