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 for the quarter  ended
June 30, 2002 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 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