CH2M Hill Companies 10-Q 2002 Q3 Quarterly report

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Exhibit 99.2

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

        In connection with the Quarterly Report of CH2M HILL Companies, Ltd. (the "Company") on Form 10-Q for the quarterly period ended September 30, 2002 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Ralph R. Peterson, Chief Executive 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 to the best of my knowledge:

(1)

The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)

Information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/  RALPH R. PETERSON      Ralph R. Peterson
Chief Executive Officer
November 13, 2002

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Company for the purposes of Section 18 of the Securities Exchange Act, as amended.

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Exhibit 99.2

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