Exhibit 99.1

                      CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Sec
1350), the undersigned, Daniel P. McCartney, Chief Executive Officer of
Healthcare Services Group, Inc., a Pennsylvania corporation (the "Company"),
does hereby certify, to his knowledge, that:

The Quarterly Report on Form 10-Q for the quarter ended March 31, 2003 of the
Company (the "Report") fully complies with the requirements of section 13(a)
or 15(d) of the Securities Exchange Act of 1934, and the information contained
in the Report fairly presents, in all material respects, the financial
condition and results of operations of the Company.

                                                /s/ Daniel P. McCartney
                                                Daniel P. McCartney
                                                Chief Executive Officer
                                                July 25, 2003