Exhibit 99.1

Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Certification of Chief Executive Officer

I, R. Douglas Cowan, Chairman and Chief Executive Officer of The Davey Tree Expert Company (the "Company"), do hereby certify in accordance with 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

     (1.)   The Quarterly Report on Form 10-Q of the Company for the period ended September 28, 2002
             (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the
             Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); 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:  November 11, 2002	/s/ R. Douglas Cowan
	R. Douglas Cowan
	Chairman and Chief Executive Officer