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                                  EXHIBIT 4.28

                         PROFESSIONAL SERVICES AGREEMENT


                      Between Registrant and Joe Malinowski

                                       

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                         PROFESSIONAL SERVICES AGREEMENT

         This Agreement memorializes an Agreement between Helionetics, Inc.,
with its place of business at 6849 Hayvenhurst Avenue, Van Nuys, California
91406 (herein referred to as "Client") and Joe Mainowski with his\their place of
business at (herein referred to as "Employee\Consultant") as through August
1996. In consideration of the mutual covenants contained herein and other
valuable consideration, the receipt and adequacy of which is acknowledged, the
parties do hereby agree as follows:

I.QUALIFICATION: The Employee has special skill and and experience in certain
fields of activity in which the Client is interested.

         II.  SERVICES RENDERED: Client engaged the nonexclusive services of
              Employee in 1995\1996 and Employee rendered substantial services
              to Client over the period ended August 31, 1996.

         III. COMPENSATION: The Client issued to Employee an amount of 5,000
              restricted shares of the Client's common stock, in payment in full
              for the aforesaid services rendered through August 31, 1996.

         IV.  ENTIRE AGREEMENT: This document represents the complete agreement
              between the parties and may be modified or amended only by
              executed written agreements. This Agreement shall be construed in
              accordance with the laws of the State of California.

IN WITNESS WHEREOF: The parties hereto have duly executed this Agreement as of
the day and year noted above.

"Client"                                                      "Consultant"
HELIONETICS, INC.



By:/s/ E. MAXWELL MALONE                                  /s/ JOE MALINOWSKI
   ---------------------------                            ----------------------
       E. Maxwell Malone                                      Joe Malinowski
       Chief Executive Officer