EXHIBIT 31.2
                                                                    ------------

                            CERTIFICATION PURSUANT TO
                    SS.302 OF THE SARBANES-OXLEY ACT OF 2002


        I, Christian  Dufresne,  Chief Financial  Officer and Treasurer of Spire
Corporation (the "Company"), certify that:

        1. I have reviewed this quarterly report on Form 10-Q/A of the Company.

        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 and cash flows of the Company as of,
and for, the periods presented in this report.

        4. The Company's  other  certifying  officer and I are  responsible  for
establishing and maintaining  disclosure  controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal  control over financial
reporting  (as defined in Exchange Act Rules  13a-15(f) and 15d - 15(f)) for the
Company 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  Company,  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) Designed  such internal  control over  financial  reporting,  or
caused such internal  control over financial  reporting to be designed under our
supervision,  to provide  reasonable  assurances  regarding the  reliability  of
financial  reporting and the  preparation  of financial  statements for external
purposes in accordance with generally accepted accounting principles;

             c) Evaluated the effectiveness of the Company's disclosure controls
and  procedures  and  presented  in  this  report  our  conclusions   about  the
effectiveness  of the disclosure  controls and procedures,  as of the end of the
period covered by this report based on such evaluation; and

             d)  Disclosed in this report any change in the  Company's  internal
control over  financial  reporting  that occurred  during the  Company's  fiscal
quarter  ended June 30,  2008 that has  materially  affected,  or is  reasonably
likely to materially  affect,  the  Company's  internal  control over  financial
reporting.

        5. The Company's other certifying officer and I have disclosed, based on
our most recent evaluation of internal control over financial reporting,  to the
Company's  auditors and the audit  committee of the Company'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 Company'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 Company's  internal  control
over financial reporting.

Dated:  November 24, 2008              By:   /s/ Christian Dufresne
                                           -------------------------------------
                                           Christian Dufresne, Ph. D.
                                           Chief Financial Officer and Treasurer