UNCONDITIONAL GUARANTY



      For and in consideration of Isaac Yeffet and Yeffet Security  Consultants,
Inc.  ("Claimants")  entry into Amendment No. 1 to the  Confidential  Settlement
Agreement  and Mutual  Release,  dated as of January 30, 2007 (the  "Amendment")
with HiEnergy Technologies,  Inc. (the "Company"),  the undersigned,  William A.
Nitze, an adult  individual  residing in the District of Columbia at the address
set forth on the signature page hereof (the "Guarantor"), hereby unconditionally
and  irrevocably  guarantees the prompt and complete  payment of the Installment
Payments (as defined in the Amendment) owed by the Company to Claimants pursuant
to the Amendment (the "Obligations").  For sake of clarification,  the Claimants
agree and understand that the Obligations guaranteed by this Guarantee encompass
only the payment of the five  Installment  Payments of $20,000 each as set forth
in the Amendment and do not extend to any other  requirements  or obligations of
the Company.  The Guarantor  hereby  expressly  agrees with and covenants to the
Claimants as follows:

1.    If Company does not perform the Obligations, or any of them, the Guarantor
      shall,  within five (5) business  days  following  written  notice of such
      failure  from  Claimants  to the  address  or fax  number set forth on the
      signature page hereof, pay and otherwise perform all of the Obligations.

2.    The obligations of the Guarantor hereunder are independent of and distinct
      from the Obligations of the Company,  and a separate action or actions may
      be  brought  and  prosecuted  against  the  Guarantor  whether  action  is
      previously or simultaneously  brought against the Company,  and/or whether
      the Company may  thereafter  be joined in any such action or actions.  The
      Guarantor  waives the benefit of any statute of limitations  affecting its
      liability hereunder or the enforcement thereof, to the extent permitted by
      law.

3.    Guarantor waives any right to require the Claimants to (a) proceed against
      Company or any other person;  (b) proceed  against or exhaust any security
      held from Company;  or (c) pursue any other remedy in the Claimants' power
      whatsoever.  Claimants may, at their election, exercise or decline or fail
      to  exercise  any right or remedy  they may have  against  Company  or any
      security held by the Claimants  including without  limitation the right to
      foreclose upon any such security by judicial or nonjudicial sale,  without
      affecting or impairing  in any way the  liability of Guarantor  hereunder.
      Guarantor  waives any defense arising by reason of any disability or other
      defense of Company or by reason of the cessation from any cause whatsoever
      of the liability of the Company,  and waives any and all other defenses of
      any kind or nature  now or  hereafter  available  to a  surety.  Guarantor
      waives any setoff,  defense or counterclaim  that Company may have against
      Claimants.  Guarantor  waives  any  defense  arising  out of the  absence,
      impairment or loss of any right of  reimbursement  or  subrogation  or any
      other  rights  against  the  Company.   Guarantor  waives  all  rights  to
      participate  in any  security  now or  hereafter  held  by the  Claimants.
      Guarantor waives all  presentments,  demands for  performance,  notices of
      nonperformance,  protests,  notices of protest,  notices of dishonor,  and
      notices of acceptance of this Guaranty and of the existence,  creation, or
      incurring  of  new  or  additional  indebtedness.  Guarantor  assumes  the
      responsibility  for being and keeping  itself  informed  of the  financial
      condition of Company and of all other circumstances  bearing upon the risk
      of nonpayment of any  indebtedness or  nonperformance  of the Obligations,
      and  agrees  that  Claimants  shall  have no duty to advise  Guarantor  of
      information  known  to  Claimants  regarding  such  condition  or any such
      circumstances

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4.    If  Company  becomes  insolvent  or is  adjudicated  bankrupt  or  files a
      petition for  reorganization,  arrangement,  composition or similar relief
      under any  present or future  provision  of the United  States  Bankruptcy
      Code,  or if such a petition  is filed  against  Company,  and in any such
      proceeding  some  or all  of the  Obligations  are  terminated,  rejected,
      modified or abrogated, or if the Obligations are otherwise avoided for any
      reason,  Guarantor agrees that Guarantor's  liability  hereunder shall not
      thereby be affected or modified and such liability  shall continue in full
      force and effect as if no such action or  proceeding  had  occurred.  This
      Guaranty shall continue to be effective or be reinstated,  as the case may
      be, if any  payment  must be returned by  Claimants  upon the  insolvency,
      bankruptcy or reorganization of Company, Guarantor, any other guarantor or
      surety, or otherwise, as though such payment had not been made.

5.    No terms or provisions of this Guaranty may be changed, waived, revoked or
      amended  without  the prior  written  consent of the  parties.  Should any
      provision  of  this  Guaranty  be  determined  by  a  court  of  competent
      jurisdiction to be unenforceable, all of the other provisions shall remain
      effective. This Guaranty,  together with any agreements (including without
      limitation any security  agreements or any pledge agreements)  executed in
      connection  with this Guaranty,  embodies the entire  agreement  among the
      parties  hereto  with  respect  to  the  matters  set  forth  herein,  and
      supersedes  all prior  agreements  among the parties  with  respect to the
      matters set forth herein. No course of prior dealing among the parties, no
      usage of trade, and no parole or extrinsic evidence of any nature shall be
      used to supplement,  modify or vary any of the terms hereof.  There are no
      conditions to the full effectiveness of this Guaranty.

6.    Guarantor  represents  and warrants to the Claimants that (i) Guarantor is
      an adult individual,  with full power and capacity to enter into,  execute
      and perform this Guaranty,  (ii)  execution,  delivery and  performance of
      this  Guaranty do not conflict with or result in a breach of or constitute
      a default  under any  documents or  agreements  to which he is party or by
      which he is bound, and (iii) this Guaranty constitutes a valid and binding
      obligation, enforceable against Guarantor in accordance with its terms.


7.    GUARANTOR WAIVES ANY RIGHT TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION
      BASED  UPON OR ARISING  OUT OF THIS  GUARANTY  OR ANY OF THE  TRANSACTIONS
      CONTEMPLATED  THEREIN,  INCLUDING CONTRACT CLAIMS, TORT CLAIMS,  BREACH OF
      DUTY CLAIMS,  AND ALL OTHER COMMON LAW OR STATUTORY CLAIMS.  This Guaranty
      shall be governed by and construed in accordance with the internal laws of
      the State of New Jersey  applicable to the  performance and enforcement of
      contracts  made  within such state,  without  giving  effect to the law of
      conflicts of laws applied  thereby.  In the event that the Claimants shall
      be  forced  to bring  any  legal  action  to  enforce,  protect  or defend
      Claimants'  rights  under  this  Guarantee,  then the  Claimants  shall be
      entitled to reimbursement from the Guarantor of all reasonable fees, costs
      and other expenses (including, without limitation, the reasonable expenses
      of counsel ) in such action.

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      IN WITNESS WHEREOF,  the undersigned  Guarantor has executed this Guaranty
as of this 30th day of January 2007.



                  WILLIAM A. NITZE



                   /S/ WILLIAM A. NITZE
                  ----------------------------------------


Address for Notice:

William A. Nitze
1537 28th Street, N.W.
Washington, D.C. 2007



                  Agreed:

                   /S/ ISAAC YEFFET
                  ---------------------------
                  Isaac Yeffet

                  Yeffet Security Consultants, Inc.

                  By:  /S/ ISAAC YEFFET
                     ------------------------
                           Isaac Yeffet
                           President


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