EXHIBIT 99.2

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

     In connection with the Quarterly Report of ABM Industries Incorporated (the “Company”) on Form 10-Q for the period ended July 31, 2002, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, George B. Sundby, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

     (1)  The Report 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 the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: September 12, 2002

/s/    George B. Sundby George B. Sundby
Chief Financial Officer
(Principal Financial Officer)