ADDENDUM TO SUB-ADVISORY AGREEMENT
                        BETWEEN TOUCHSTONE ADVISORS, INC.
                 AND WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P.

                      TOUCHSTONE GROWTH OPPORTUNITIES FUND
                           TOUCHSTONE STRATEGIC TRUST

      This Addendum is entered into as of March 1, 2011 by and between
Touchstone Advisors, Inc. (the "Advisor") and Westfield Capital Management
Company, L.P. (the "Sub-Advisor").

      WHEREAS, the Advisor and the Sub-Advisor entered into a Sub-Advisory
Agreement dated as of May 15, 2008 (the "Sub-Advisory Agreement"); and

      WHEREAS, the Advisor and the Sub-Advisor wish to enter into this Addendum
to the Sub-Advisory Agreement in order to change the compensation to the
Sub-Advisor for the services to be provided to the Touchstone Growth
Opportunities Fund (the "Fund"), a series of Touchstone Strategic Trust;

      NOW, THEREFORE, it is agreed by and between the parties that Section 3.a.
of the Sub-Advisory Agreement containing the sub-advisory fee rate payable to
the Sub-Adviser be amended as of the date of this Agreement as provided below to
reflect the revised compensation payable on behalf of the Fund:

      3.a. As compensation for the services to be rendered and duties undertaken
      hereunder by the Sub-Advisor, the Advisor will pay to the Sub-Advisor a
      monthly fee equal on an annual basis to ______, without regard to any
      total expense limitation of the Trust or the Advisor. Such fee shall be
      computed and accrued daily. If the Sub-Advisor serves in such capacity for
      less than the whole of any period specified in this Section 3a, the
      compensation to the Sub-Advisor shall be prorated. For purposes of
      calculating the Sub-Advisor's fee, the daily value of the Fund Assets
      shall be computed by the same method as the Trust uses to compute the net
      asset value of the Fund for purposes of purchases and redemptions of
      shares thereof.



      IN WITNESS WHEREOF, each of the parties hereto has caused this Addendum to
be duly executed and delivered in its name and on its behalf by their respective
officers thereunto duly authorized, all as of the day and year first above
written.

TOUCHSTONE ADVISORS, INC.             WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P.


By:          /s/ Brian Hirsch         By:          /s/ Karon A. DiGravio
             -----------------------               -----------------------------

Print Name:                           Print Name:
             ----------------------                -----------------------------

Print Title: SVP                      Print Title: Partner, CIO, CCO
             ----------------------                -----------------------------

Date:        02/18/11                 Date:        02/23/11
             ----------------------                -----------------------------