EXHIBIT 31.1

                                  CERTIFICATION
                                  -------------

I, T. Gary Trimm, certify that:

     1.   I  have  reviewed  this  quarterly  report  on Form 10-Q of Concurrent
          Computer Corporation;

     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 registrant as of, and for, the periods presented in
          this report;

     4.   The  registrant'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)) 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 the end of the
                    period covered by this report based on such evaluation; and

               c)   Disclosed  in  this  report  any  changes  in  the
                    registrant's  internal control over financial reporting that
                    occurred  during  the period covered by this report that has
                    materially  affected,  or is reasonably likely to materially
                    affect,  the  registrant's  internal  control over financial
                    reporting.

     5.   The  registrant's  other  certifying  officer  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.


Date: June 20, 2005

                                     /s/ T. Gary Trimm
                                   -------------------------
                                   Name: T. Gary Trimm
                                   Title:  President and Chief Executive Officer
                                   (Principal Executive Officer)