Exhibit 32.2

Certification of

Chief Financial Officer

Of The Keith Companies, Inc.

      This certification is provided pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, U.S.C. §Section 1350, and accompanies the Annual Report on Form 10-K (the “Form 10-K”) for the period ended December 31, 2004 of The Keith Companies, Inc. (the “Issuer”).

      I, Gary C. Campanaro, the Chief Financial Officer of Issuer certify that, pursuant to 18 U.S.C. §Section 1350, as adopted pursuant to §Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge:

      (ii) the Form 10-K fully complies with the requirements of section 13(a) or section 15(d) of the Securities Exchange Act of 1934; and

      (ii) the information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Issuer.

/s/ Gary C. Campanaro

Name: Gary C. Campanaro

Dated: March 9, 2005