Exhibit 32.2


                            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 SIGA  Technologies,  Inc. (the
"Company")  on Form 10-Q for the period  ending  June 30, 2007 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"),  I, Thomas
N. Konatich.,  Chief Financial Officer of the Company,  certify,  pursuant to 18
U.S.C. ss.1350, as adopted pursuant to ss.906 of the Sarbanes-Oxley Act of 2002,
that, to the best of my knowledge:

      (3)   The Report fully complies with the  requirements of section 13(a) or
            15(d) of the Securities Exchange Act of 1934; and

      (4)   The  information  contained in the Report  fairly  presents,  in all
            material respects, the financial condition and results of operations
            of the Company.


August 14, 2007

                                                         /s/ Thomas N. Konatich
                                                         ----------------------
                                                         Thomas N. Konatich
                                                         Chief Financial Officer


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