EXHIBIT 32.1

                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
                       AS ADOPTED PURSUANT TO SECTION 906
                        OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of NATIONAL TECHNICAL SYSTEMS, INC. (the
"Company")  on Form 10-Q for the period  ended  April 30, 2008 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, William
McGinnis, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C.
Section 1350, as adopted  pursuant to Section 906 of the  Sarbanes-Oxley  Act of
2002, to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of
the Securities Exchange Act of 1934, as amended; and

(2) The  information  contained in the Report fairly  presents,  in all material
respects, the financial condition and results of operations of the Company as of
and for the periods presented in the Report.

                                                  /s/ William McGinnis
                                     -------------------------------------------
                                                   William McGinnis,
                                                Chief Executive Officer
                                                     and Director
                                            (Principal Executive Officer)

                                                                   June 13, 2008

A signed  original of this  written  statement  required by Section 906 has been
provided to the Company and will be retained by the Company and furnished to the
Securities and Exchange Commission or its staff upon request.

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