Exhibit A2


                                 CERTIFICATIONS

I, John P. Kavanaugh, certify that:

     1.   I have  reviewed  this  report on Form N-CSR of  Allmerica  Securities
          Trust;

     2.   Based on my  knowledge,  this  report  does  not  contain  any  untrue
          statement  of a  material  fact  or  omit to  state  a  material  fact
          necessary to make the statements  made, in light of the  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this report;

     3.   Based on my knowledge,  the financial statements,  and other financial
          information  included in this report,  fairly  present in all material
          respects the financial  condition,  results of operations,  changes in
          net assets,  and cash flows (if the financial  statements are required
          to include a  statement  of cash flows) of the  registrant  as of, and
          for, the periods presented in this report;

     4.   The registrant's other certifying officer(s) and I are responsible for
          establishing  and maintaining  disclosure  controls and procedures (as
          defined in Rule 30a-3(c) under the Investment Company Act of 1940) for
          the registrant and have:

          (a)  Designed such disclosure controls and procedures,  or caused such
               disclosure  controls  and  procedures  to be  designed  under our
               supervision,  to ensure that material information relating to the
               registrant,  including  its  consolidated  subsidiaries,  is made
               known to us by others within those entities,  particularly during
               the period in which this report is being prepared;

          (b)  Evaluated  the  effectiveness  of  the  registrant's   disclosure
               controls  and   procedures  and  presented  in  this  report  our
               conclusions  about the  effectiveness of the disclosure  controls
               and  procedures,  as of a date within 90 days prior to the filing
               date of this report based on such evaluation; and

          (c)  Disclosed in this report any change in the registrant's  internal
               control  over  financial   reporting  that  occurred  during  the
               registrant's  most  recent  fiscal  half-year  (the  registrant's
               second fiscal half-year in the case of an annual report) that has
               materially  affected,  or  is  reasonably  likely  to  materially
               affect,   the   registrant's   internal  control  over  financial
               reporting; and

     5.   The registrant's  other certifying  officer(s) and I have disclosed to
          the registrant's  auditors and the audit committee of the registrant's
          board of directors (or persons performing the equivalent functions):

          (a)  All  significant  deficiencies  and  material  weaknesses  in the
               design or operation of internal control over financial  reporting
               which are reasonably  likely to adversely affect the registrant's
               ability  to record,  process,  summarize,  and  report  financial
               information; and

          (b)  Any fraud,  whether or not material,  that involves management or
               other employees who have a significant  role in the  registrant's
               internal control over financial reporting.


Date: August 19, 2004

/s/ John P. Kavanaugh
- ------------------------------------
John P. Kavanaugh
President and Chairman







                                   * * * * *

I, Paul T. Kane, certify that:

     1.   I have  reviewed  this  report on Form N-CSR of  Allmerica  Securities
          Trust;

     2.   Based on my  knowledge,  this  report  does  not  contain  any  untrue
          statement  of a  material  fact  or  omit to  state  a  material  fact
          necessary to make the statements  made, in light of the  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this report;

     3.   Based on my knowledge,  the financial statements,  and other financial
          information  included in this report,  fairly  present in all material
          respects the financial  condition,  results of operations,  changes in
          net assets,  and cash flows (if the financial  statements are required
          to include a  statement  of cash flows) of the  registrant  as of, and
          for, the periods presented in this report;

     4.   The registrant's other certifying officer(s) and I are responsible for
          establishing  and maintaining  disclosure  controls and procedures (as
          defined in Rule 30a-3(c) under the Investment Company Act of 1940) for
          the registrant and have:

          (a)  Designed such disclosure controls and procedures,  or caused such
               disclosure  controls  and  procedures  to be  designed  under our
               supervision,  to ensure that material information relating to the
               registrant,  including  its  consolidated  subsidiaries,  is made
               known to us by others within those entities,  particularly during
               the period in which this report is being prepared;

          (b)  Evaluated  the  effectiveness  of  the  registrant's   disclosure
               controls  and   procedures  and  presented  in  this  report  our
               conclusions  about the  effectiveness of the disclosure  controls
               and  procedures,  as of a date within 90 days prior to the filing
               date of this report based on such evaluation; and

          (c)  Disclosed in this report any change in the registrant's  internal
               control  over  financial   reporting  that  occurred  during  the
               registrant's  most  recent  fiscal  half-year  (the  registrant's
               second fiscal half-year in the case of an annual report) that has
               materially  affected,  or  is  reasonably  likely  to  materially
               affect,   the   registrant's   internal  control  over  financial
               reporting; and

     5.   The registrant's  other certifying  officer(s) and I have disclosed to
          the registrant's  auditors and the audit committee of the registrant's
          board of directors (or persons performing the equivalent functions):

          (a)  All  significant  deficiencies  and  material  weaknesses  in the
               design or operation of internal control over financial  reporting
               which are reasonably  likely to adversely affect the registrant's
               ability  to record,  process,  summarize,  and  report  financial
               information; and

          (b)  Any fraud,  whether or not material,  that involves management or
               other employees who have a significant  role in the  registrant's
               internal control over financial reporting.



Date: August 19, 2004

/s/ Paul T. Kane
- ------------------------------------
Paul T. Kane
Assistant Vice President and Treasurer
(Principal Accounting Officer and
Principal Financial Officer)