Exhibit 6(k)



                                     FORM OF

                              SUB-ADVISER AGREEMENT

   SUB-ADVISER AGREEMENT executed as of     , 2003, between Allmerica Financial
Investment Management Services, Inc. (the "Manager") and Jennison Associates LLC
(the "Sub-Adviser").

WITNESSETH:

   That in consideration of the mutual covenants herein contained, it is agreed
as follows:

1. SERVICES TO BE RENDERED BY SUB-ADVISER TO THE TRUST

      (a) Subject always to the control of the Trustees of Allmerica Investment
   Trust (the "Trust"), a Massachusetts business trust, the Sub-Adviser, at its
   expense, will furnish continuously an investment program for the following
   series of shares of the Trust: the Select Growth Fund (the "Fund") and such
   other series of shares as the Trust, the Manager and the Sub-Adviser may from
   time to time agree on (together, the "Funds"). The Sub-Adviser acknowledges
   the Fund may have one or more other sub-advisers and that the Manager shall
   from time to time determine the portion of the Fund's assets to be managed by
   the Sub-Adviser (the "Sub-Adviser's Portion"). The Sub-Adviser will make
   investment decisions on behalf of the Sub-Adviser's Portion and place all
   orders for the purchase and sale of portfolio securities. In the performance
   of its duties, the Sub-Adviser will comply with the provisions of the
   Agreement and Declaration of Trust and Bylaws of the Trust and the objectives
   and policies of the Fund, as set forth in the current Registration Statement
   of the Trust filed with the Securities and Exchange Commission ("SEC") and
   any applicable federal and state laws, and will comply with other policies
   which the Trustees of the Trust (the "Trustees") or the Manager, as the case
   may be, may from time to time determine and which are furnished to the
   Sub-Adviser including, if requested by the Manager, managing the
   Sub-Adviser's Portion as if it were a separate investment company for the
   purposes of determining compliance with the provisions of the Agreement and
   Declaration of Trust and Bylaws of the Trust and the objectives and policies
   of the Fund, as set forth in the current Registration Statement of the Trust
   filed with the SEC and any applicable federal and state laws, and other
   policies which the Trustees of the Trust or the Manager may furnish to the
   Sub-Adviser. The Sub-Adviser shall make its officers and employees available
   to the Manager from time to time at reasonable times to review investment
   policies of the Fund and to consult with the Manager regarding the investment
   affairs of the Fund. In the performance of its duties hereunder, the
   Sub-Adviser is and shall be an independent contractor and, unless otherwise
   expressly provided or authorized, shall have no authority to act for or
   represent the Trust in any way or otherwise be deemed to be an agent of the
   Trust.



      (b) The Sub-Adviser, at its expense, will furnish (i) all investment and
   management facilities, including salaries of personnel necessary for it to
   perform the duties set forth in this Agreement, and (ii) administrative
   facilities, including clerical personnel and equipment necessary for the
   conduct of the investment affairs of the Fund (excluding brokerage expenses
   and pricing and bookkeeping services).

      (c) The Sub-Adviser shall place all orders for the purchase and sale of
   portfolio investments for the Fund with issuers, brokers or dealers selected
   by the Sub-Adviser which may include brokers or dealers affiliated with the
   Sub-Adviser. In the selection of such brokers or dealers and the placing of
   such orders, the Sub-Adviser always shall seek best execution (except to the
   extent permitted by the next sentence hereof), which is to place portfolio
   transactions where the Fund can obtain the most favorable combination of
   price and execution services in particular transactions or provided on a
   continuing basis by a broker or dealer, and to deal directly with a principal
   market maker in connection with over-the-counter transactions, except when it
   is believed that best execution is obtainable elsewhere. Subject to such
   policies as the Trustees may determine, the Sub-Adviser shall not be deemed
   to have acted unlawfully or to have breached any duty created by this
   Agreement or otherwise solely by reason of its having caused the Trust to pay
   a broker or dealer that provides brokerage and research services an amount of
   commission for effecting a portfolio investment transaction in excess of the
   amount of commission another broker or dealer would have charged for
   effecting that transaction, if the Sub-Adviser determines in good faith that
   such excess amount of commission was reasonable in relation to the value of
   the brokerage and research services provided by such broker or dealer, viewed
   in terms of either that particular transaction or the overall
   responsibilities of the Sub-Adviser and its affiliates with respect to the
   Trust and to other clients of the Sub-Adviser as to which Sub-Adviser or any
   affiliate of the Sub-Adviser exercises investment discretion.

2. OTHER AGREEMENTS

   It is understood that any of the shareholders, Trustees, officers and
employees of the Trust may be a shareholder, partner, director, officer or
employee of, or be otherwise interested in, the Sub-Adviser, and in any person
controlled by or under common control with the Sub-Adviser, and that the
Sub-Adviser and any person controlled by or under common control with the
Sub-Adviser may have an interest in the Trust. It is also understood that the
Sub-Adviser and persons controlled by or under common control with the
Sub-Adviser have and may have advisory, management service or other contracts
with other organizations and persons, and may have other interests and
businesses.

3. COMPENSATION TO BE PAID BY THE MANAGER TO THE SUB-ADVISER

   The Manager will pay to the Sub-Adviser as compensation for the
Sub-Adviser's services rendered a fee, determined as described in Schedule A
which is attached hereto and made a part hereof. Such fee shall be paid by the
Manager and not by the Trust.

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4. AMENDMENTS OF THIS AGREEMENT

   This Agreement (including Schedule A attached hereto) shall not be amended as
to any Fund unless such amendment is approved at a meeting by the affirmative
vote of a majority of the outstanding voting securities of the Fund, if such
approval is required under the Investment Company Act of 1940, as amended ("1940
Act"), and by the vote, cast in person at a meeting called for the purpose of
voting on such approval, of a majority of the Trustees who are not interested
persons of the Trust or of the Manager or of the Sub-Adviser.

5. EFFECTIVE PERIOD AND TERMINATION OF THIS AGREEMENT

   This Agreement shall be effective as of the date executed, and shall remain
in full force and effect as to each Fund continuously thereafter, until
terminated as provided below:

      (a) Unless terminated as herein provided, this Agreement shall remain in
   full force and effect through May 30, 2004 and shall continue in full force
   and effect for successive periods of one year thereafter, but only so long as
   such continuance is specifically approved at least annually (i) by the
   Trustees or by the affirmative vote of a majority of the outstanding voting
   securities of the Fund, and (ii) by a vote of a majority of the Trustees who
   are not interested persons of the Trust or of the Manager or of any
   Sub-Adviser, by vote cast in person at a meeting called for the purpose of
   voting on such approval; provided, however, that if the continuance of this
   Agreement is submitted to the shareholders of the Fund for their approval and
   such shareholders fail to approve such continuance of this Agreement as
   provided herein, the Sub-Adviser may continue to serve hereunder in a manner
   consistent with the 1940 Act and the rules and regulations thereunder.

      (b) This Agreement may be terminated as to any Fund without the payment of
   any penalty by the Manager, subject to the approval of the Trustees, by vote
   of the Trustees, or by vote of a majority of the outstanding voting
   securities of such Fund at any annual or special meeting or by the
   Sub-Adviser, in each case on sixty days' written notice.

      (c) This Agreement shall terminate automatically, without the payment of
   any penalty, in the event of its assignment or in the event that the
   Management Agreement with the Manager shall have terminated for any reason.

      (d) In the event of termination of this Agreement, the Fund will no longer
   use the name "Jennison Associates LLC" in materials relating to the Fund
   except as may be required by the 1940 Act and the rules and regulations
   thereunder.

6. CERTAIN DEFINITIONS

   For the purposes of this Agreement, the "affirmative vote of a majority of
the outstanding voting securities" means the affirmative vote, at a duly called
and held

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meeting of shareholders, (a) of the holders of 67% or more of the shares of the
Fund present (in person or by proxy) and entitled to vote at such meeting, if
the holders of more than 50% of the outstanding shares of the Fund entitled to
vote at such meeting are present in person or by proxy, or (b) of the holders of
more than 50% of the outstanding shares of the Fund entitled to vote at such
meeting, whichever is less.

   For the purposes of this Agreement, the terms "control", "interested person"
and "assignment" shall have their respective meanings defined in the 1940 Act
and rules and regulations thereunder, subject, however, to such exemptions as
may be granted by the SEC under said Act; the term "specifically approve at
least annually" shall be construed in a manner consistent with the 1940 Act and
the rules and regulations thereunder; and the term "brokerage and research
services" shall have the meaning given in the Securities Exchange Act of 1934
and the rules and regulations thereunder.

7. NON-LIABILITY OF SUB-ADVISER

   The Sub-Adviser shall be under no liability to the Trust, the Manager or the
Trust's Shareholders or creditors for any matter or thing in connection with the
performance of any of the Sub-Adviser's services hereunder or for any losses
sustained or that may be sustained in the purchase, sale or retention of any
investment for the Funds of the Trust made by it in good faith; provided,
however, that nothing herein contained shall be construed to protect the
Sub-Adviser against any liability to the Trust by reason of the Sub-Adviser's
own willful misfeasance, bad faith or gross negligence in the performance of its
duties or by reason of its reckless disregard of its obligations and duties
hereunder.

8. LIMITATIONS OF LIABILITY OF THE TRUSTEES AND SHAREHOLDERS

   A copy of the Trust's Agreement and Declaration of Trust is on file with the
Secretary of the Commonwealth of Massachusetts, and notice is hereby given that
this instrument is executed by the Trustees as Trustees and not individually and
that the obligations of this instrument are not binding upon any of the
Trustees, officers or shareholders individually but are binding only upon the
assets and property of the appropriate Fund.

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   IN WITNESS WHEREOF, Allmerica Financial Investment Management Services, Inc.
has caused this instrument to be signed in duplicate on its behalf by its duly
authorized representative and Jennison Associates LLC has caused this instrument
to be signed in duplicate on its behalf by its duly authorized representative,
all as of the day and year first above written.

                                           Allmerica Financial
                                           Investment Management Services, Inc.

                                           By:    ---------------------------

                                           Title: ---------------------------

                                           Jennison Associates LLC

                                           By:    ---------------------------

                                           Title: ---------------------------

                    Accepted and Agreed to as of the day
                    and year first above written:

                    ALLMERICA INVESTMENT TRUST

                    By:    ---------------------------

                    Title: ---------------------------

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                                   SCHEDULE A

   The Manager will pay to the Sub-Adviser as full compensation for the
Sub-Adviser's services rendered, a fee computed daily and paid quarterly at an
annual rate based on the Sub-Adviser's Portion of the average daily net assets
of the Fund as described below:


                   Net Assets                     Fee Rate
                   ----------                     --------
                   First $300 million ..........    0.35%
                   Next $200 million ...........    0.30%
                   Over $500 million ...........    0.25%


   The average daily net assets of the Fund shall be determined by taking an
average of all of the determinations of net asset during each month at the close
of business on each business day during such month while this Agreement is in
effect.

   The fee for each quarter shall be payable within ten (10) business days after
the end of the quarter.

   If the Sub-Adviser shall serve for any period less than a full month, the
foregoing compensation shall be prorated according to the proportion which such
period bears to a full month.

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