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 ending October 31, 2005 as filed with the
Securities and Exchange  Commission on the date hereof (the  "Report"),  I, Jack
Lin , 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,
                                        Principal Executive Officer and Director

                                                               December 13, 2005

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.


                                       25