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
               registrant's  most  recent  fiscal  quarter  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: May 5, 2005

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