EXHIBIT 10.14

                    AMENDMENT NUMBER EIGHT TO REVOLVING CREDIT AGREEMENT

                    This  AMENDMENT  NUMBER  EIGHT TO REVOLVING CREDIT AGREEMENT
              (this  "Amendment'),  dated as of September  26, 2007,  is entered
              into  among  NATIONAL  TECHNICAL   SYSTEMS,   INC.,  a  California
              corporation  ("Parent'),   NTS  TECHNICAL  SYSTEMS,  a  California
              corporation,  dba National Technical Systems ("NTS'), XXCAL, INC.,
              a California  corporation  ("XXCAL'),  APPROVED  ENGINEERING  TEST
              LABORATORIES, INC., a California corporation ("AETL"), ETCR, INC.,
              a California  corporation  ("ETCR"),  ACTON ENVIRONMENTAL  TESTING
              CORPORATION,  a  Massachusetts  corporation  ("Acton"),  and PHASE
              SEVEN LABORATORIES, INC., a California corporation ("Phase Seven")
              and one or more  Subsidiaries  of Parent,  whether now existing or
              hereafter acquired or formed,  which become party to the Agreement
              (as defined below) by executing an Addendum in the form of Exhibit
              1 of the Agreement (NTS, XXCAL, AETL, ETCR, Acton, Phase Seven and
              such other  Subsidiaries  are sometimes  individually  referred to
              herein as a  "Subsidiary  Borrower" and  collectively  referred to
              herein as "Subsidiary  Borrowers",  and  Subsidiary  Borrowers and
              Parent  are  sometimes   individually  referred  to  herein  as  a
              "Borrower" and  collectively  referred to herein as  `Borrowers"),
              the  financial  institutions  from time to time parties  hereto as
              Lenders,   whether  by  execution  hereof  or  an  Assignment  and
              Acceptance in accordance  with Section 11.5 (c) of the  Agreement,
              and Comerica Bank, in its capacity as  contractual  representative
              for itself and the other Lenders ('Agent"),  with reference to the
              following facts:

                    A.    Borrowers,  Agent and  Lenders  are  parties  to  that
              certain Revolving Credit Agreement, dated as of November 21, 2001,
              as  amended by that  certain  Amendment  Number  One to  Revolving
              Credit  Agreement,  dated  as  of  July  17,  2002,  that  certain
              Amendment  Number Two to Revolving Credit  Agreement,  dated as of
              November  25,  2002,  that  certain   Amendment  Number  Three  to
              Revolving  Credit  Agreement,  dated  as of July  21,  2003,  that
              certain Amendment Number Four to Revolving Credit Agreement, dated
              as of  July  30,  2004,  that  certain  Amendment  Number  Five to
              Revolving Credit Agreement, dated as of July 1, 2005, that certain
              Amendment  Number Six to Revolving Credit  Agreement,  dated as of
              March  29,  2006,  and  that  certain  Amendment  Number  Seven to
              Revolving Credit Agreement,  dated as of September 21, 2006 (as so
              amended, the "Agreement');

                    B.    Borrowers and Agent,  in its capacity as Agent for the
              Lenders, entered into that certain Security Agreement, dated as of
              November 21, 2001 (the "Security Agreement');

                    C.    Borrowers,  Agent  and Lenders desire to further amend
              the Agreement in accordance with the terms of this Amendment.

                    NOW,  THEREFORE,  in  consideration  of the  foregoing,  the
              parties hereto hereby agree as follows:

                    1.    Defined Terms.  All initially  capitalized  terms used
              but not defined  herein shall have the  meanings  assigned to such
              terms in the Agreement.

                    2.    Amendments to the Agreement.


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                    2.1   Definitions.

                          (a)   The following  definitions  set forth in Section
              1.1 of the  Agreement  are  hereby  amended in their  entirety  as
              follows:

                         "Revolving Loans Maturity Date" means February 1, 2009.

                    3.    Conditions  Precedent to  Effectiveness  of Amendment.
              The  effectiveness  of this Amendment is subject to and contingent
              upon  the  fulfillment  of each  and  every  one of the  following
              conditions:

                          (a)   Agent shall have received this  Amendment,  duly
              executed by Borrowers and all Lenders;

                          (b)   No Event of Default,  Unmatured Event of Default
              or Material Adverse Effect shall have occurred; and

                          (c)   All of the  representations  and  warranties set
              forth herein,  in the Loan Documents and in the Agreement shall be
              true,  complete and accurate in all respects as of the date hereof
              (except for  representations  and  warranties  which are expressly
              stated to be true and correct as of the Closing Date).

                    4.    Representations  and  Warranties.  In  order to induce
              Agent and  Lenders to enter  into this  Amendment,  each  Borrower
              hereby represents and warrants to Agent and Lenders that:

                          (a)   No  Event  of  Default  or  Unmatured  Event  of
              Default is continuing;

                          (b)   All of the  representations  and  warranties set
              forth in the Agreement and the Loan  Documents are true,  complete
              and  accurate  in all  respects  (except for  representations  and
              warranties which are expressly stated to be true and correct as of
              the Closing Date); and

                          (c)   This  Amendment  has  been  duly  executed   and
              delivered by Borrowers, and after giving effect to this Amendment,
              the Agreement and the Loan  Documents  continue to constitute  the
              legal,  valid and binding agreements and obligations of Borrowers,
              enforceable   in   accordance   with   their   terms,   except  as
              enforceability  may be  limited  by  bankruptcy,  insolvency,  and
              similar laws and equitable principles affecting the enforcement of
              creditors' rights generally.

                    5.    Counterparts;  Telefacsimile Execution. This Amendment
              may be executed  in any number of  counterparts  and by  different
              parties on separate counterparts, each of which, when executed and
              delivered,  shall be deemed to be an  original,  and all of which,
              when  taken  together,  shall  constitute  but one  and  the  same
              Amendment.  Delivery of an executed  counterpart of this Amendment
              by  telefacsimile  shall be equally as  effective as delivery of a
              manually  executed  counterpart  of  this  Amendment.   Any  party
              delivering   an  executed   counterpart   of  this   Amendment  by
              telefacsimile  also shall deliver a manually executed  counterpart
              of this  Amendment but the failure to deliver a manually  executed
              counterpart  shall not affect the  validity,  enforceability,  and
              binding effect of this Amendment.

                    6.    Integration.   The   Agreement  as   amended  by  this
              Amendment  constitutes  the  entire  agreement  and  understanding
              between the  parties  hereto  with  respect to the subject  matter
              hereof and thereof,  and supersedes  any and all prior  agreements
              and  understandings,  oral or  written,  relating  to the  subject
              matter hereof


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<PAGE>

              and thereof

                    7.    Reaffirmation  of  the  Agreement.  The  Agreement  as
              amended hereby and the other Loan  Documents  remain in fall force
              and effect.

                    IN WITNESS  WHEREOF,  the parties  hereto have duly executed
              and  delivered  this  Amendment  as of the date first  hereinabove
              written.


                                             NATIONAL TECHNICAL SYSTEMS, INC.


                                             By:
                                                   Lloyd Blonder, Senior
                                                   Vice President, Finance,
                                                   Treasurer and
                                                   Assistant Secretary


                                             NTS TECHNICAL SYSTEMS dba NATIONAL
                                             TECHNICAL SYSTEMS


                                             By:
                                                   Lloyd Blonder, Senior
                                                   Vice President,
                                                   Finance, Treasurer and
                                                   Assistant Secretary


                                             XXCAL, INC.


                                             By:
                                                   Lloyd Blonder, Vice
                                                   President, Treasurer and
                                                   Assistant Secretary


                                             APPROVED ENGINEERING TEST
                                             LABORATORIES, INC.


                                             By:
                                                   Lloyd Blonder, Vice
                                                   President, Treasurer and
                                                   Assistant Secretary


                                             ETCR, INC.


                                             By:
                                                   Lloyd Blonder, Vice
                                                   President, Treasurer and
                                                   Assistant Secretary


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<PAGE>

                                             ACTON ENVIRONMENTAL TESTING
                                             CORPORATION


                                             By:
                                                   Lloyd Blonder, Vice
                                                   President, Treasurer and
                                                   Assistant Clerk


                                             PHASE SEVEN LABORATORIES, INC.


                                             By:
                                                   Lloyd Blonder, Vice
                                                   President, Treasurer and
                                                   Assistant Secretary


                                             COMERICA BANK, in its capacities as
                                             Agent, Issuing Lender and a Lender


                                             By:
                                                   Vahe S. Medzoyan,
                                                   Vice President


                                             FIRST BANK & TRUST, in its capacity
                                             as a Lender


                                             By:

                                                   Name: Bake Seaton
                                                   Title: Vice President


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