EXHIBIT 31.1
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CERTIFICATIONS

I, Shelby T. Brewer, certify that:

         1.   I have  reviewed this  quarterly  report on Form 10-Q of Commodore
              Applied Technologies, Inc.;

         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 Commodore Applied Technologies,  Inc.
              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  Exchange  Act  Rules  13a-15(e)  and
              15d-15(e)) for Commodore Applied Technologies, Inc. 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 the  end  of  the  period
                     covered by 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  quarter (the
                     registrant's fourth fiscal quarter 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,
              based on our most  recent  evaluation  of  internal  control  over
              financial  reporting,  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.


/s/ Shelby T. Brewer
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Shelby T. Brewer
Chairman and Chief Executive Officer
November 14, 2003