EXHIBIT 10.2

                       RESTRICTED STOCK PURCHASE AGREEMENT

       THIS RESTRICTED STOCK PURCHASE AGREEMENT (this "AGREEMENT"),  dated as of
the 1st day of  September,  2001, is made by and between DATA SYSTEMS & SOFTWARE
INC.,  a Delaware  corporation  (the  "COMPANY"),  with its  principal  place of
business at 200 Route 17,  Mahwah,  New Jersey 97430,  and ROBERT M. CHISTE,  an
individual   residing  at  15834   Hidden  Cove,   Houston,   Texas  77079  (the
"PURCHASER").

                                   WITNESSETH

              WHEREAS, the Purchaser has entered into an employment agreement of
even date hereof with Comverge,  Inc. ("COMVERGE") (a subsidiary of the Company)
(the "COMVERGE EMPLOYMENT  AGREEMENT"),  pursuant to which the Purchaser will be
the Chief Executive Officer and Vice Chairman of Comverge;

              WHEREAS,  pursuant to paragraph  2(c) of the  Comverge  Employment
Agreement  and as a condition to the  employment  of the  Purchaser by Comverge,
Comverge  agreed to cause the Company to issue and sell to the Purchaser  50,000
shares (the "SHARES") of common stock,  par value $0.01, of the Company ("COMMON
STOCK") at purchase price of $5.95 per Share for an aggregate  purchase price of
$297,500 (the "PURCHASE PRICE"); and

              WHEREAS, the Company desires that the Purchaser serve as the Chief
Executive  Officer  and Vice  Chairman  of  Comverge  pursuant  to the  Comverge
Employment  Agreement  and is willing to sell the Shares to the Purchaser on the
terms and conditions set forth herein.

              NOW,  THEREFORE,  in  consideration  of the mutual  agreements and
considerations set forth herein, the parties hereby agree as follows.

       1.     SALE AND PURCHASE OF SHARES.

              1.1    PURCHASE  OF STOCK.  Subject  to the  terms and  conditions
stated herein,  the Purchaser hereby subscribes for and agrees to purchase,  and
the Company agrees to sell to the Purchaser,  the Shares in consideration of the
payment by the Purchaser of the Purchase Price by the assignment and endorsement
by the Purchaser of $297,500 in principal  amount from a 6%  subordinated  note,
dated  September  29,  2000,  made by  Philip  Services  Corp.  in  favor of the
Purchaser in the principal amount of $1,752,277 (the "PSC Note").

              1.2    DELIVERY.  At the Closing (as defined below), the Purchaser
shall deliver to the Company a PSC Note in the principal amount of $297,500 made
in favor of and registered in the name of the Company (the "COMPANY'S PSC NOTE")
and  accompanied  by an executed  assignment  in form and  substance  reasonably
satisfactory  to the Company of the date hereof.  Upon receipt of the  Company's
PSC Note, the Company shall issue and deliver to the Purchaser one or more stock
certificate(s) registered in the Purchaser's name for the Shares being purchased
hereunder.




              1.3    CLOSING. The closing of the purchase and sale of the Shares
(the  "CLOSING")  shall  take  place on such date and time as shall be  mutually
agreed to by the parties hereto and at such place as shall be mutually agreed to
by the  parties  hereto.  The date and time of the Closing is referred to as the
"CLOSING DATE."

       2.     REPRESENTATIONS   OF  THE  PURCHASER.   The  Purchaser  makes  the
following  representations and warranties to the Company,  each and all of which
shall  survive the  execution  and  delivery of this  Agreement  and the Closing
hereunder:

              2.1    INVESTMENT  INTENT.  The  Purchaser  represents  that he is
acquiring the Shares for  investment for his own account and not with a view to,
or for resale in connection with, the distribution or other disposition thereof.
The Purchaser agrees that he will not, directly or indirectly,  offer, transfer,
sell,  assign,  pledge,  hypothecate or otherwise dispose of (each a "TRANSFER")
any of the Shares  unless such  Transfer  complies  with the  provisions of this
Agreement  (including,  but not  limited  to,  Section  4.1  hereof) and (A) the
Transfer is pursuant to an effective registration statement under the Securities
Act of 1933, as amended, and the rules and regulations in effect thereunder (the
"SECURITIES  ACT"),  (B) such Transfer is made in accordance with Rule 144 under
the  Securities  Act, or (C) counsel for the Purchaser  shall have furnished the
Company with an opinion,  reasonably  acceptable  to the  Company,  that no such
registration is required  because of the  availability of an exemption under the
Securities Act.

              2.2    ACCREDITED  INVESTOR.   The  Purchaser  is  an  "Accredited
Investor"  (as that  term is  defined  in Rule  501 of  Regulation  D under  the
Securities  Act) and by reason of his business  and  financial  experience,  the
Purchaser  has such  knowledge,  sophistication  and  experience in business and
financial  matters as to be capable  of  evaluating  the merits and risks of the
prospective  investment in the Shares and making an informed investment decision
with respect  thereto.  The  Purchaser is able to bear the economic  risk of his
investment  in the  Shares  and is  able  to  afford  a  complete  loss  of such
investment;  and he has made an  independent  investigation  of the  Company and
relied upon his own due  diligence,  valuation  analysis  and other  analyses in
determining to purchase the Shares.

              2.3    SHARES NOT REGISTERED.  The Purchaser acknowledges that the
Shares have not been registered  under the Securities Act or the securities laws
of any state or other  jurisdiction and cannot be Transferred  unless the Shares
are  subsequently  registered  under the Securities Act and any applicable state
laws or an exemption  from such  registration  is available.  The Purchaser also
acknowledges  and agrees that he has no registration  rights with respect to the
Shares.

              2.4    CAPACITY.  The Purchaser has the capacity to enter into and
perform his obligations  under this Agreement and each  agreement,  document and
instrument  to be  executed  and  delivered  by or on  behalf  of the  Purchaser
(including the assignment and  endorsement of the PSC Note),  or as contemplated
by this  Agreement  and to carry out the  transactions  contemplated  hereby and
thereby,  including,  without  limitation,  the  assignment  of a portion of the
principal of the PSC Note to the Company.

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              2.5    NO VIOLATION;  NO CONSENT. This Agreement constitutes,  and
each other  agreement,  document and  instrument to be executed and delivered by
the  Purchaser  pursuant to or as  contemplated  by this  Agreement  will,  when
executed  and  delivered  by the  Purchaser,  constitute,  a valid  and  binding
obligation  of the  Purchaser,  enforceable  against the Purchaser in accordance
with its terms.  The execution  and delivery by the Purchaser of this  Agreement
and each agreement,  document and instrument to be executed and delivered by the
Purchaser  pursuant to or as  contemplated by this Agreement and the performance
by the Purchaser of the transactions contemplated hereby and thereby,  including
the assignment and  endorsement of a portion of the principal of the PSC Note to
the  Company,  do not and will not: (A)  violate,  conflict  with or result in a
default  (whether  after the giving of notice,  lapse of time or both) under the
Indenture (as defined below) or any material contract or obligation to which the
Purchaser is a party or by which the Purchaser or his assets are bound and which
have not been waived; (B) to the Purchaser's  knowledge,  violate or result in a
violation of, or constitute a default under,  any provision of any material law,
regulation or rule, or any order of, or any restriction imposed by, any court or
governmental agency applicable to the Purchaser;  (C) require from the Purchaser
any notice to,  declaration  or filing  with,  or  consent  or  approval  of any
governmental authority or third party other than as may be required to secure an
exemption from registration or qualification of the offer and sale of the Shares
under the Securities  Act, and applicable  state or foreign  securities and blue
sky laws; or (D)  accelerate any  obligation  under,  or give rise to a right of
termination of, any material  agreement,  permit,  license or  authorization  to
which the Purchaser is a party or by which the Purchaser is bound.

              2.6    PSC NOTE AND THE  COMPANY'S  PSC  NOTE.  To the best of the
Purchaser's  knowledge,  the Company's PSC Note  constitutes a valid and binding
obligation  of  Philip  Services  Corp.  ("PSC"),  enforceable  against  PSC  in
accordance with its terms, and PSC is not in a default under the PSC Note or the
Company's PSC Note and no event has occurred which,  after the giving of notice,
lapse of time or both,  would  constitute  a  default  under the PSC Note or the
Company's PSC Note. The Purchaser has not pledged or created a security interest
in or otherwise  encumbered  whatsoever  the PSC Note or the Company's PSC Note,
and the Purchaser has not made any prior  assignments  or any other  Transfer of
the PSC Note or the  Company's  PSC Note.  Except as contained in or provided by
the PSC Note or the  Company's  PSC Note,  the  Purchaser  has not  executed any
agreement  subordinating or affecting the priority of or reducing payments under
the PSC Note or the  Company's  PSC Note.  The  Purchaser  has  delivered to the
Company a full,  complete and correct copy of the  indenture  governing  the PSC
Note and the Company's PSC Note (the "INDENTURE"),  which Indenture, to the best
of the  Purchaser's  knowledge,  has not been  amended,  modified  or waived and
remains  (and shall  continue  to remain by its terms  until fully paid) in full
force and effect. By their terms, the PSC Note and the Company's PSC Note can be
assigned  and  endorsed to the Company  without the prior  consent of PSC or any
other third party.  Upon the  Purchaser's  delivery of the Company's PSC Note to
the Company,  the Company will be the legal and valid  registered  holder of the
Company's  PSC Note free and clear of all  liens,  security  interests,  claims,
charges or any other  encumbrances,  and the  Company  shall be  entitled to all
rights and  benefits  provided  under the  Indenture  to the Holders (as defined
therein) and to the receipt of all payments of interest and principal  under the
Company's PSC Note.

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       3.     COMPANY'S REPRESENTATIONS AND WARRANTIES.

              3.1    ORGANIZATION   AND  CORPORATE   POWER.  The  Company  is  a
corporation duly organized, validly existing and in good standing under the laws
of the State of  Delaware.  The Company  has all  required  corporate  power and
authority  to carry on its business as  presently  conducted,  to enter into and
perform this Agreement and to carry out the  transactions  contemplated  hereby,
including the issuance and sale of the Shares.

              3.2    AUTHORIZATION.  The  Company  has all  requisite  power and
authority to issue,  sell and deliver the Shares in accordance with and upon the
terms and  conditions  set forth in this  Agreement,  and all  corporate  action
required  to be  taken  by the  Company  for the due and  proper  authorization,
issuance and  delivery of the Shares  will,  upon  delivery  thereof,  have been
taken.  The Shares,  when sold and paid for as  contemplated  in this Agreement,
will be duly  authorized,  validly issued,  fully paid and  non-assessable  and,
except as otherwise  provided by applicable  law, free of all liens,  claims and
encumbrances.

              3.3    NO  VIOLATION;  NO CONSENT.  This  Agreement  constitutes a
valid and binding obligation of the Company,  enforceable against the Company in
accordance  with its terms.  The  execution  and delivery by the Company of this
Agreement and the  performance by the Company of the  transactions  contemplated
hereby and thereby,  including  the issuance and delivery of the Shares,  do not
and will not: (A) violate,  conflict with or result in a default  (whether after
the giving of notice,  lapse of time or both)  under any  material  contract  or
obligation  to which the  Company  is a party or by which it or its  assets  are
bound and which  have not been  waived,  or any  provision  of the  articles  of
incorporation or bylaws of the Company; (B) to the Company's knowledge,  violate
or result in a violation of, or constitute a default under, any provision of any
material law,  regulation or rule, or any order of, or any  restriction  imposed
by, any court or governmental agency applicable to the Company; (C) require from
the Company any notice to, declaration or filing with, or consent or approval of
any  governmental  authority  or third  party  other than as may be  required to
secure an exemption from  registration or qualification of the offer and sale of
the Shares under the Securities Act and applicable  state or foreign  securities
and blue sky laws; or (D)  accelerate any  obligation  under,  or give rise to a
right  of  termination   of,  any  material   agreement,   permit,   license  or
authorization to which the Company is a party or by which the Company is bound.

              3.4    SECURITIES    LAWS.   In   reliance   on   the   investment
representations  of the Purchaser  contained in Sections 2.1 and 2.2 hereof, the
offer, issuance, sale and delivery of the Shares, as provided in this Agreement,
are exempt from the  registration  requirements  of the  Securities  Act and all
applicable state securities laws, and are otherwise in compliance with such laws
in all material  respects.  Neither  Company nor any person acting on its behalf
has taken or will take any action which might subject the offering,  issuance or
sale  of the  Shares  to  the  registration  requirements  of  Section  5 of the
Securities Act.

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       4.     COVENANTS.

              4.1    PROCEDURE FOR  TRANSFERS.  Any Transfer by the Purchaser of
any of the Shares shall be conditioned upon compliance by the Purchaser with the
provisions of Section 2.1 hereof.

              4.2.   LEGEND.  The Purchaser agrees that the following legend (or
substantially  similar legends) shall be placed on each  certificate  evidencing
the Shares:

              THE SECURITIES  REPRESENTED  HEREBY HAVE NOT BEEN  REGISTERED WITH
              THE  SECURITIES  AND EXCHANGE  COMMISSION OR ANY STATE  SECURITIES
              COMMISSIONS   AND  MAY   NOT  BE   OFFERED,   SOLD,   TRANSFERRED,
              HYPOTHECATED  OR  OTHERWISE  ASSIGNED  EXCEPT  (1)  PURSUANT  TO A
              REGISTRATION  STATEMENT WITH RESPECT TO SUCH  SECURITIES  WHICH IS
              EFFECTIVE UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT")
              OR (2) PURSUANT TO AN AVAILABLE  EXEMPTION FROM REGISTRATION UNDER
              THE ACT AND UNDER  APPLICABLE  STATE SECURITIES AND BLUE SKY LAWS,
              PROVIDED  THAT AN OPINION OF COUNSEL TO SUCH EFFECT IS PROVIDED TO
              THE COMPANY IN CONNECTION THEREWITH.

       5.     CONDITIONS TO CLOSING.  The Company's  condition to Closing is the
execution  and delivery by the Purchaser of the Comverge  Employment  Agreement.
The  Purchaser's  condition  to Closing is the  execution  and  delivery  by the
Company of this Agreement.

       6.     MISCELLANEOUS.

              6.1    NOTICES.  All  notices  and other  communications  provided
herein shall be in writing.  Notice shall be deemed delivered (i) three (3) days
after the  deposit  in the U.S.  mail of a writing  addressed  as above and sent
first class mail, certified,  return receipt requested, (ii) upon hand delivery,
(iii) one business day after  deposit with Federal  Express or other  recognized
over-night  courier service,  or (iv) when actually  received.  Either party may
change the  address  for notice by  notifying  the other party of such change in
accordance with this Section 6.1

              6.2    COUNTERPARTS;  ENTIRE  AGREEMENT.  This  Agreement  may  be
executed  in  counterparts.  This  Agreement  constitutes  the entire  agreement
between the parties hereto with respect tot he subject matter hereof.

              6.3    BINDING  EFFECT.  The provisions of this Agreement shall be
binding  upon and shall  inure to the  benefit of the  parties  hereto and their
respective heirs, legal representatives, successors and assigns.

              6.4    AMENDMENT;  WAIVER. This Agreement may be amended only by a
written instrument signed by the parties hereto which  specifically  states that
it is  amending  this  Agreement,  and no term of this  Agreement  may be waived
except in  writing  signed  by the party  waiving  such  term.  No waiver by the
parties  hereto of any default or breach of any term,


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condition  or covenant of this  Agreement  shall be deemed to be a waiver of any
subsequent  default  or  breach  of the same or any  other  term,  condition  or
covenant contained herein.

              6.5    APPLICABLE GOVERNING LAW; JURISDICTION.  This Agreement and
the rights and  obligations  of the  parties  hereto  shall be  governed  by and
constructed  and  enforced  in  accordance  with,  the laws of the  State of New
Jersey.  Each party  hereby  irrevocably  consents  and agrees that any legal or
equitable  action or  proceeding  based upon,  arising under or relating to this
Agreement  shall be brought  exclusively  in any  Federal or state  court in the
County of Bergen, State of New Jersey. Each party hereby irrevocably consents to
the personal jurisdiction of each such court.

              6.6    HEADINGS.  The  headings  herein  are  for  convenience  of
reference  only, do not  constitute a part of this  Agreement,  and shall not be
deemed to limit, expand or otherwise affect any of the provisions hereof.


                        [SIGNATURES APPEAR ON NEXT PAGE]


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              IN  WITNESS  WHEREOF,   the  parties  hereto  have  executed  this
Agreement as of the date first written above.

                                         DATA SYSTEMS & SOFTWARE, INC.


                                         By: /s/ George Morgenstern
                                            -----------------------------------
                                                  Name:  George Morgenstern
                                                  Title: President and
                                                         Chief Executive Officer




                                          /s/ Robert M. Chiste
                                         ---------------------------------------
                                          Robert M. Chiste

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