Exhibit 10.26

                        AMENDMENT TO EMPLOYMENT AGREEMENT


This amendment  ("Amendment") to the Employment Agreement ("Agreement") executed
between  Exigent  International,  Inc. and Don F. Riordan  dated 11 June 1997 is
entered into as of 13 May 1998 between Exigent International,  Inc. ("Exigent"),
a  corporation  duly  authorized  and  existing  under  the laws of the State of
Delaware  with a principal  place of  business  at 1225 Evans  Road,  Melbourne,
Florida 32904 and Don F. Riordan ("Employee"), an individual domiciled at 414 La
Costa Street, Melbourne Beach, FL 32951.

NOW, THEREFORE,  for one dollar and other good and valuable  consideration,  the
receipt and  sufficiency of which is hereby mutually  acknowledged,  Exigent and
Employee hereby agree as follows:

     1.   Option Price in  Agreement.  Section  3(c) in the  Agreement is hereby
          deleted and replaced with the following:

         "Provided that Employee has not been  terminated for due cause (as that
         term is defined  below in Section 8, in  addition  to the  compensation
         provided  for in Section  3(a) above,  Company  shall grant to Employee
         options to purchase an  additional  46,000 shares of Common Stock at an
         exercise price of $2.25 per share provided the Company shall achieve:

(i)      earnings of at least 2.9 million dollars; or

(ii)              new  funding  for the  Company  of at least 5 million  dollars
                  including  long term (at least 5 years)  subordinated  debt or
                  equity, or a combination of both.

         The Board of  Directors  of the Company  may,  in its sole  discretion,
         award part or all of the  options to  purchase  such  46,000  shares of
         Common Stock even if the foregoing conditions are partially achieved on
         or prior to February 1, 1998 in accordance with the Executive Incentive
         Plan for  1998.  If and to the  extent  any such  options  are  awarded
         pursuant to this Section 3(c), they shall be awarded in accordance with
         the prevailing  terms and conditions  described in Executive  Incentive
         Plan and the governing  Stock Option Plan (6NQ) adjusted to reflect the
         amount  which the  Employee  is  actually  awarded by the  Compensation
         Committee for the Board of Directors of the Company."



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2.       Ratification  and  Approval.  In all other  respects  the  Agreement is
         hereby  ratified by Exigent and  Employee and remains in full force and
         effect, as previously amended.

IN WITNESS  WHEREOF,  this  Amendment  has been duly executed as of the date set
forth above and is retroactively effective from April 16, 1998.

For Exigent:                                        For Employee:

Exigent International, Inc.                         Don F. Riordan


By: /s/ B.R. Smedley                                By:  /s/ Don F. Riordan, Jr.
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     (signature)                                              (signature)

Name: B.R. Smedley
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Title: CEO
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