EXHIBIT 99.1 CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350 In connection with the accompanying Quarterly Report on Form 10-Q of The A Consulting Team, Inc. for the three months ended March 31, 2003, I, Shmuel BenTov, the principal executive officer of The A Consulting Team, Inc., hereby certify, pursuant to 18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of 2002, that: (1) such Quarterly Report on Form 10-Q for the three months ended March 31, 2003 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 such Quarterly Report on Form 10-Q for the three months ended March 31, 2003 fairly presents, in all material respects, the financial condition and results of operations of The A Consulting Team, Inc., on a consolidated basis. May 14, 2003 /s/ Shmuel BenTov - ------------ ------------------------------------------- Date Name: Shmuel BenTov Title: Chairman, Chief Executive Officer and President A signed original of this written statement required by section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request. The foregoing certification is being furnished solely pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code) and is not being filed as part of the Form 10-Q or as a separate disclosure document.