This Statement confirms that the undersigned, Mr. Edward C. Hauck,
has authorized and designated each of Robert E. Rout, Wendy S. Bell or
Timothy P. McKee to execute and file on the undersigned's behalf all
Forms 3, 4 and 5 (including any amendments thereto) that the undersigned
may be required to file with the U.S. Securities and Exchange Commission
as a result of the undersigned's ownership of or transactions in securities
of S&T Bancorp, Inc.  The authority of Robert E. Rout, Wendy S. Bell or
Timothy P. McKee under this Statement shall continue until the undersigned
is no longer required to file Forms 3, 4 and 5 with regard to his/her
ownership of or transactions in securities of S&T Bancorp, Inc., unless
earlier revoked in writing.  The undersigned acknowledges that Robert E. Rout,
Wendy S. Bell or Timothy P. McKee are not assuming any of the undersigned's
responsibilities to comply with Section 16 of the Securities Exchange Act
of 1934.


/s/ Edward C. Hauck

