Document:

<PAGE>

                                                                   Exhibit 10.67

                 SECOND AMENDMENT TO SECOND AMENDED AND RESTATED
                           LOAN AND SECURITY AGREEMENT
                      AND AMENDMENT TO OTHER LOAN DOCUMENTS

     THIS SECOND AMENDMENT TO SECOND AMENDED AND RESTATED LOAN AND SECURITY
AGREEMENT AND AMENDMENT TO OTHER LOAN DOCUMENTS (hereinafter, this "Agreement")
is entered into as of the 31st day of July, 2002, to be effective as of the date
hereof (the "Effective Date"), by and among IDS ENGINEERING, INC., a Texas
corporation ("IDS Engineering"), THERMAIRE, INC., a Texas corporation
("Thermaire"), CONSTANT POWER MANUFACTURING, INC., a Texas corporation
("Constant Power"), INDUSTRIAL DATA SYSTEMS, INC., a Texas corporation ("Data"),
IDS ENGINEERING MANAGEMENT, LC, a Texas limited liability company
("Management"), PETROCON ENGINEERING, INC., a Texas corporation ("Petrocon"),
TRIANGLE ENGINEERS AND CONSTRUCTORS, INC., a Texas corporation ("Triangle"),
PETROCON SYSTEMS, INC., a Texas corporation ("Petrocon Systems"), PETROCON
ENGINEERING OF LOUISIANA, INC., a Louisiana corporation ("Petrocon Louisiana"),
R.P.M. ENGINEERING, INC., a Louisiana corporation ("RPM"), PETROCON CONSTRUCTION
RESOURCES, INC., a Texas corporation ("Petrocon Construction"), PETROCON
TECHNOLOGIES, INC., a Texas corporation ("Petrocon Technologies"), ALLIANCE
ENGINEERING ASSOCIATES, INC., a Texas corporation ("Alliance") (individually, a
"Borrower" and collectively, "Borrowers"), FLEET CAPITAL CORPORATION, a Rhode
Island corporation ("Fleet"), as Agent (Fleet, in such capacity, the "Agent"),
and the financial institution(s) listed on the signature pages hereof and their
respective successors and assigns (each individually a "Lender" and collectively
"Lenders").

                                    RECITALS

     A. Borrowers, Agent and Lender have entered into that certain Second
Amended and Restated Loan and Security Agreement, dated as of December 21, 2001,
as amended by that certain First Amendment to Second Amended and Restated Loan
and Security Agreement entered into as of March 26, 2002, by Borrowers, Agent
and Lender (as amended, the "Loan Agreement").

     B. Borrowers, Lender and Agent desire to amend the Loan Agreement as
hereinafter set forth.

     NOW, THEREFORE, in consideration of the premises herein contained and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties, intending to be legally bound, agree as follows:

                                    ARTICLE I
                                   Definitions

     1.01 Capitalized terms used in this Agreement, to the extent not otherwise
defined herein, shall have the same meaning as in the Loan Agreement, as amended
hereby.

                                       1

<PAGE>
1

                                   ARTICLE II
                                   Amendments

     2.01 Amendment to Section 2.1.1 of the Loan Agreement. Effective as of the
Effective Date, Section 2.1.1 of the Loan Agreement is hereby amended by
deleting therefrom the phrase "two and three-quarters percent (2.75%)" and
substituting therefor the phrase "two and one-half percent (2.50%)".

     2.02 Additions of New Section 2.14 to the Loan Agreement. Effective as of
the Effective Date, a new Section 2.1.4 interest Rate Reduction is hereby added
to the Loan Agreement to read in its entirety as follows:

          "2.1.4 Interest Rate Reduction. So long as no Default or Event of
     Default has occurred and is continuing, in the event that Borrower achieves
     after the effective date of the Second Amendment the Rate Reduction
     Performance Factor defined below, effective upon receipt and review by
     Agent of information and materials furnished by Borrower pursuant to
     Section 8.1.3 of this Agreement demonstrating compliance with the Rate
     Reduction Performance Factor defined below, the relevant Applicable Annual
     Rate then in effect as to all outstanding Loans shall be reduced by
     one-quarter of one percent (0.25%); provided, however, that as to
     Eurodollar Loans, the reduction in the relevant Applicable Annual Rate
     shall be effective only for Eurodollar Loans requested after the date on
     which Agent has received and reviewed information and materials supplied by
     Borrower demonstrating compliance with the Rate Reduction Performance
     Factor set forth below. For the purposes of this Agreement, the `Rate
     Reduction Performance Factor' means that Borrower is able to establish
     pursuant to information and materials in form and substance satisfactory to
     Agent furnished in connection with Section 8.1.3 of this Agreement that the
     Fixed Charge Ratio for the twelve calendar month period ending on the last
     day of each calendar month during any fiscal quarter of Borrower is greater
     than 1.25 to 1.00. If the Fixed Charge Ratio for the twelve calendar month
     period ending on the last day of any month is thereafter equal to or less
     than 1.25 to 1.00, the relevant Applicable Annual Rate then in effect as to
     all outstanding Loans shall be increased by one-quarter of one percent
     (0.25%); provided, however, that Borrower shall again be able to achieve a
     one-quarter of one percent (0.25%) reduction in the Applicable Annual Rate
     if it thereafter again achieves the above-described Rate Reduction
     Performance Factor and no Default or Event of Default has occurred and is
     continuing. It is the intent of the parties that the achievement and
     elimination of this one-quarter of one percent (0.25%) reduction in the
     Applicable Annual Rate can continue to occur periodically during the term
     of this Agreement. However, the Applicable Annual Rate may not be reduced
     more than one-quarter of one percent (0.25%) pursuant to the provisions of
     this Section 2.1.4."

     2.03 Amendment to Section 4.1 of the Loan Agreement. Effective as of the
Effective Date, Section 4.1 of the Loan Agreement is hereby amended by deleting
therefrom the reference to the date "June 14, 2003" and substituting therefor
the date "June 30, 2005".

                                       2

<PAGE>

     2.04 Amendment to Section 4.2.3 of the Loan Agreement. Effective as of the
Effective Date, Section 4.2.3 of the Loan Agreement is hereby amended and
restated to read in its entirety as follows:

          "4.2.3 Termination Charges. On the effective date of termination of
     this Agreement for any reason, Borrower shall pay to Agent, for the account
     of Lenders (in addition to the then outstanding principal, accrued interest
     and other charges owing under the terms of this Agreement and any of the
     other Loan Documents), as liquidated damages for the loss of the bargain
     and not as a penalty, an amount equal to (i) one percent (1.00%) of the
     Total Credit Facility if termination occurs on or prior to June 30, 2003,
     (ii) three-quarters of one percent (0.75%) of the Total Credit Facility if
     termination occurs after June 30, 2003, but on or before June 30, 2004, and
     (iii) one-half of one percent (0.50%) if termination occurs after June 30,
     2004, but on or prior to June 30, 2005. Notwithstanding the foregoing, if
     termination occurs after June 30, 2005, no termination charge shall be
     payable."

     2.05 Amendment to Section 8.2.3 of the Loan Agreement. Effective as of the
Effective Date, clause (ix) of Section 8.2.3 of the Loan Agreement is hereby
amended and restated to read as follows:

          "(ix) contingent obligations under any guarantee (a) by Borrower or
     its Subsidiaries of any of the obligations of any other Subsidiary as
     lessee under any lease which is otherwise permitted under this Agreement,
     and (b) by Petrocon as to Indebtedness incurred by PEI Investments in
     connection with improvements and repairs to the building located at 3155
     Executive Boulevard, Beaumont, Texas, provided that the amount of such
     Indebtedness does not exceed $50,000;".

     2.06 Amendment to Section 8.3.1 of the Loan Agreement. Effective as of the
Effective Date, Section 8.3.1 of the Loan Agreement is hereby deleted in its
entirety and the following is substituted in lieu thereof:

          "8.3.1 Fixed Charge Ratio. Maintain, on a Consolidated Basis, as of
     the last day of each calendar month set forth below, for the twelve (12)
     calendar month period ending on such date, a Fixed Charge Ratio equal to or
     greater than the ratio set forth below for the period corresponding
     thereto:

                  Period                                Ratio
                  ------                                -----
     June 30, 2002--December 31, 2002                1.10 to 1.00
     January 31, 2003 and thereafter                 1.15 to 1.00

     2.07 Amendment to Section 8.3.2 of the Loan Agreement. Effective as of the
Effective Date, Section 8.3.2 of the Loan Agreement is hereby deleted in its
entirety and the following is substituted in lieu thereof:

                                       3

<PAGE>

          "8.3.2 Ratio of Senior Debt and Equus Term Note to EBITDA. Maintain,
     on a Consolidated basis, as of the end of each calendar month set forth
     below, a ratio of (i) the sum of (a) Borrower's Senior Debt on such date
     (provided, however, that in this calculation of the Senior Debt of
     Borrower, the unpaid amount of the Revolving Credit Loans on such date
     shall be deemed to be the Average Monthly Revolving Credit Loan Balance for
     such month) and (b) the unpaid principal amount of the Equus Term Note on
     such date, to (ii) Borrower's EBITDA for the twelve- (12) calendar month
     period ending on such date, equal to or less than the ratio set forth below
     for the period corresponding thereto:

                  Period                                Ratio
                  ------                                -----
     June 30, 2002--August 31, 2002                  3.00 to 1.00
     September 30, 2002-- November 30, 2002          2.75 to 1.00
     December 31, 2002 and thereafter                2.50 to 1.00"

     2.08 Amendment to Appendix A of the Loan Agreement; Amendment of Definition
of "Borrowing Base". Effective as of the Effective Date, the definition of
`Borrowing Base" contained in Appendix A of the Loan Agreement is amended by
deleting each reference therein to the phrase "eighty-five percent (85%)" and
substituting therefor the phrase `ninety percent (90%)".

     2.09 Amendment to Appendix A of the Loan Agreement; Amendment of
Definition of "EBITDA". Effective as of the Effective Date, the definition of
"EBITDA" contained in Appendix A of the Loan Agreement is hereby deleted in its
entirety and the following is substituted in lieu thereof:

          "EBITDA - for any fiscal period of Borrower, means an amount equal to
     (a) the sum of (i) Adjusted Net Earnings From Operations for such period,
     plus (ii) Interest Expense for such period, plus (iii) income tax expense
     for such period, plus, (iv) depreciation and amortization for such period.
     For purposes of the calculation of any of the financial covenants set forth
     in Section 8.3 of this Agreement for which EBITDA is relevant (but only for
     such purposes), (x) all non-cash expenses of Borrower during the period
     covered by such financial covenant shall be added back to the calculation
     of EBITDA for such period, but will be subtracted during the period in
     which actually paid and (y) all merger-related costs incurred in connection
     with the IDSC Merger shall be added back to the calculation of EBITDA for
     the period such merger-related costs were actually expensed."

     2.10 Amendment to Appendix A of the Loan Agreement; Amendment of Definition
of "Eligible Account". Effective as of the Effective Date, the definition of
"Eligible Account" contained in Appendix A of the Loan Agreement is hereby
amended as follows:

                                       4

<PAGE>

          (a) Clause (viii) of such definition is amended and restated to read
     in its entirety as follows:

               "(viii) it arises from a sale to an Account Debtor with its
          principal office, assets or place of business outside the United
          States, unless the sale (a) is backed by an irrevocable letter of
          credit issued or confirmed by Bank and is in form and substance
          acceptable to Agent, payable in the full amount of the Account and/or
          Performance Account in freely convertible Dollars at a place of
          payment within the United States or (b) is covered by foreign credit
          insurance in form and substance acceptable to Agent; provided,
          however, that during the period beginning with the effective date of
          the Second Amendment and continuing for one hundred eighty (180) days
          thereafter (but only during such 180 day period), an Account or
          Performance Account arising from a sale to an Account Debtor with its
          principal office, assets or place of business outside the United
          States which otherwise would be an Eligible Account except for the
          preceding provisions of this clause (viii), shall not be excluded as
          an Eligible Account solely because it is not backed by such an
          irrevocable letter of credit or covered by such foreign credit
          insurance; however, this proviso shall not apply with respect to any
          such Account or Performance Account to the extent the total unpaid
          amount of all such Accounts and Performance Accounts exceed $500,000
          at any time during this 180 day period, to the extent of such
          excess;".

               (b) Clause (xviii) of such definition is amended by deleting
          therefrom the dollar amount "$2,352,941" and substituting therefor the
          dollar amount "$3,333,333."

     2.11 Amendment to Appendix A of the Loan Agreement; Addition of Definition
of "Second Amendment". Effective as of the Effective Date, a new definition,
"Second Amendment", is hereby added to Appendix A of the Loan Agreement, such
new definition to read in its entirety as follows:

          "Second Amendment -- that certain Second Amendment to Second Amended
     and Restated Loan and Security Agreement and Amendment to Other Loan
     Documents executed by Borrower, Agent and Lenders."

     2.12 References to Industrial Data Systems Corporation in Loan Documents.
Effective as of the Effective Date, all references in each Loan Document to
"Industrial Data Systems Corporation" or "IDSC" shall be deemed to be references
to "ENGlobal Corporation" in order to reflect that Industrial Data Systems
Corporation, a Nevada corporation, has changed its name to ENGlobal Corporation.

     2.13 Amendment Fee. Borrowers hereby agree to pay Agent, for the benefit of
Lender, in immediately available funds, a $35,000 amendment fee, which fee shall
be deemed fully earned and non-refundable, and shall be due and payable as of
the date of execution of this Amendment by Borrowers.

                                       5

<PAGE>

                                   ARTICLE III
                              Conditions Precedent

     3.01 Conditions to Effectiveness. Notwithstanding anything herein to the
contrary, the effectiveness of this Agreement is subject to the satisfaction of
the following conditions precedent, unless specifically waived in writing by
Agent and Lender:

          (a) Agent shall have received, in form and substance satisfactory to
     Agent, (i) this Agreement, duly executed by Borrowers, (ii) the Consent,
     Ratification and Release attached hereto, duly executed by each Guarantor,
     (iii) a consent to this Amendment, duly executed by each holder of
     Subordinated Debt, and (iv) such additional documents, instruments and
     information as Agent or its legal counsel, Patton Boggs LLP, may request.

          (b) All corporate proceedings taken in connection with the
     transactions contemplated by this Agreement and the agreements described in
     clause (a) above and all documents, instruments and other legal matters
     incident thereto shall be satisfactory to Agent and its legal counsel,
     Patton Boggs LLP.

          (c) Agent shall have received payment, in immediately available funds,
     of the $35,000 amendment fee provided for in Section 2.12 of this
     Agreement.

                                   ARTICLE IV
                                    No Waiver

     4.01 Nothing contained herein shall be construed as a waiver by Agent or
Lender of any covenant or provision of the Loan Agreement, the other Loan
Documents, this Agreement, or of any other contract or instrument between
Borrowers and Agent and/or Lender, and Agent and/or Lender's failure at any time
or times hereafter to require strict performance by Borrowers of any provision
thereof shall not waive, affect or diminish any right of Agent and/or Lender to
thereafter demand strict compliance therewith. Agent and Lender hereby reserve
all rights granted under the Loan Agreement, the other Loan Documents, this
Agreement and any other contract or instrument between Borrowers, Agent and/or
Lender.

                                    ARTICLE V
                  Ratifications, Representations and Warranties

     5.01 Ratifications. The terms and provisions set forth in this Agreement
shall modify and supersede all inconsistent terms and provisions set forth in
the Loan Agreement and the other Loan Documents, and except as expressly
modified and superseded by this Agreement, the terms and provisions of the Loan
Agreement and the other Loan Documents are ratified and confirmed and shall
continue in full force and effect. Borrowers, Agent and Lender agree that the
Loan Agreement and the other Loan Documents, as amended hereby, shall continue
to be legal, valid, binding and enforceable in accordance with their respective
terms.

     5.02 Representations and Warranties. Borrowers hereby represent and warrant
to Agent and

                                       6

<PAGE>

Lender that (a) the execution, delivery and performance of this Agreement and
any and all other Loan Documents executed and/or delivered in connection
herewith have been authorized by all requisite corporate action on the part of
Borrowers and will not violate the Articles of Incorporation or Bylaws of
Borrowers; (b) the representations and warranties contained in the Loan
Agreement, as amended hereby, and any other Loan Document are true and correct
on and as of the date hereof and on and as of the date of execution hereof as
though made on and as of each such date; (c) no Event of Default or Default
under the Loan Agreement has occurred and is continuing, unless such Event of
Default or Default has been specifically waived in writing by Agent and Lender;
(d) Borrowers are in full compliance with all covenants and agreements contained
in the Loan Agreement and the other Loan Documents, as amended hereby; and (e)
Borrowers have not amended their Articles of Incorporation or Bylaws since the
date of the original, unamended Loan Agreement.

                                   ARTICLE VI
                            Miscellaneous Provisions

     6.01 Survival of Representations and Warranties. All representations and
warranties made in the Loan Agreement or any other Loan Document, including,
without limitation, any document furnished in connection with this Agreement,
shall survive the execution and delivery of this Agreement and the other Loan
Documents, and no investigation by Agent or Lender or any closing shall affect
the representations and warranties or the right of Agent or Lender to rely upon
them.

     6.02 Reference to Loan Agreement. Each of the Loan Documents, including the
Loan Agreement and any and all other agreements, documents or instruments now or
hereafter executed and delivered pursuant to the terms hereof or pursuant to the
terms of the Loan Agreement, as amended hereby, are hereby amended so that any
reference in such Loan Documents to the Loan Agreement shall mean a reference to
the Loan Agreement, as amended hereby.

     6.03 Expenses of Agent and Lender. As provided in the Loan Agreement,
Borrowers agree to pay on demand all costs and expenses incurred by Agent and
Lender in connection with the preparation, negotiation and execution of this
Agreement and the other Loan Documents executed pursuant hereto and any and all
amendments, modifications, and supplements thereto, including, without
limitation, the costs and fees of Agent's and Lender's legal counsel, and all
costs and expenses incurred by Agent and/or Lender in connection with the
enforcement or preservation of any rights under the Loan Agreement, as amended
hereby, or any other Loan Documents, including, without limitation, the costs
and fees of Agent's and Lender's legal counsel.

     6.04 Severability. Any provision of this Agreement held by a court of
competent jurisdiction to be invalid or unenforceable shall not impair or
invalidate the remainder of this Agreement and the effect thereof shall be
confined to the provision so held to be invalid or unenforceable.

     6.05 Successors and Assigns. This Agreement is binding upon and shall inure
to the benefit of Agent, Lender and Borrowers and their respective successors
and assigns, except

                                       7

<PAGE>

Borrowers may not assign or transfer any of their rights or obligations
hereunder without the prior written consent of Lender.

     6.06 Counterparts. This Agreement may be executed in one or more
counterparts, each of which when so executed shall be deemed to be an original,
but all of which when taken together shall constitute one and the same
instrument.

     6.07 Effect of Waiver. No consent or waiver, express or implied, by Agent
or Lender to or for any breach of or deviation from any covenant or condition by
Borrowers shall be deemed a consent to or waiver of any other breach of the same
or any other covenant, condition or duty.

     6.08 Headings. The headings, captions, and arrangements used in this
Agreement are or convenience only and shall not affect the interpretation of
this Agreement.

     6.09 Applicable Law. THIS AGREEMENT AND ALL OTHER LOAN DOCUMENTS EXECUTED
PURSUANT HERETO SHALL BE DEEMED TO HAVE BEEN MADE AND TO BE PERFORMABLE IN AND
SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF
TEXAS.

     6.10 Final Agreement. THE LOAN DOCUMENTS, AS AMENDED HEREBY, REPRESENT THE
ENTIRE EXPRESSION OF THE PARTIES WITH RESPECT TO THE SUBJECT MATTER HEREOF ON
THE DATE THIS AGREEMENT IS EXECUTED. THE LOAN DOCUMENTS, AS AMENDED HEREBY, MAY
NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES. THERE ARE NO ORAL AGREEMENTS BETWEEN THE PARTIES. NO
MODIFICATION, RESCISSION, WAIVER, RELEASE OR AMENDMENT OF ANY PROVISION OF THIS
AGREEMENT SHALL BE MADE, EXCEPT BY A WRITTEN AGREEMENT SIGNED BY BORROWERS,
AGENT AND LENDER.

     6.11 Release. EACH BORROWER HEREBY ACKNOWLEDGES THAT IT HAS NO DEFENSE,
COUNTERCLAIM, OFFSET, CROSS-COMPLAINT, CLAIM OR DEMAND OF ANY KIND OR NATURE
WHATSOEVER THAT CAN BE ASSERTED TO REDUCE OR ELIMINATE ALL OR ANY PART OF ITS
LIABILITY TO REPAY THE "OBLIGATIONS" OR TO SEEK AFFIRMATIVE RELIEF OR DAMAGES OF
ANY KIND OR NATURE FROM AGENT AND/OR LENDER. EACH BORROWER HEREBY VOLUNTARILY
AND KNOWINGLY RELEASES AND FOREVER DISCHARGES AGENT AND LENDER, THEIR RESPECTIVE
PREDECESSORS, AGENTS, EMPLOYEES, SUCCESSORS AND ASSIGNS, FROM ALL POSSIBLE
CLAIMS, DEMANDS, ACTIONS, CAUSES OF ACTION, DAMAGES, COSTS, EXPENSES, AND
LIABILITIES WHATSOEVER, KNOWN OR UNKNOWN, ANTICIPATED OR UNANTICIPATED,
SUSPECTED OR UNSUSPECTED, FIXED, CONTINGENT, OR CONDITIONAL, AT LAW OR IN
EQUITY, ORIGINATING IN WHOLE OR IN PART ON OR BEFORE THE DATE THIS AGREEMENT IS
EXECUTED, WHICH

                                       8

<PAGE>

SUCH BORROWER MAY NOW OR HEREAFFER HAVE AGAINST AGENT AND/OR LENDER, THEIR
RESPECTIVE PREDECESSORS, AGENTS, EMPLOYEES, SUCCESSORS AND ASSIGNS, IF ANY, AND
IRRESPECTIVE OF WHETHER ANY SUCH CLAIMS ARISE OUT OF CONTRACT, TORT, VIOLATION
OF LAW OR REGULATIONS, OR OTHERWISE, AND ARISING FROM ANY "LOANS", INCLUDING,
WITHOUT LIMITATION, ANY CONTRACTING FOR, CHARGING, TAKING, RESERVING, COLLECTING
OR RECEIVING INTEREST IN EXCESS OF THE HIGHEST LAWFUL RATE APPLICABLE, THE
EXERCISE OF ANY RIGHTS AND REMEDIES UNDER THE LOAN AGREEMENT OR OTHER
AGREEMENTS, AND NEGOTIATION FOR AND EXECUTION OF THIS AGREEMENT.

              [The Remainder of this Page intentionally Left Blank]

                                       9

<PAGE>

ACCEPTED as of the date first written above.

                                   BORROWERS:

                                   IDS ENGINEERING, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                          Title: CFO

                                   THERMAIRE, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                   CONSTANT POWER MANUFACTURING, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                   INDUSTRIAL DATA SYSTEMS, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                   IDS ENGINEERING MANAGEMENT, LC

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                       10

<PAGE>

                                   PETROCON ENGINEERING, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                   TRIANGLE ENGINEERS AND CONSTRUCTORS, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                   PETROCON SYSTEMS, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                   PETROCON ENGINEERING OF LOUISIANA, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                   R.P.M. ENGINEERING, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                   PETROCON CONSTRUCTION RESOURCES, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                       11

<PAGE>

                                   PETROCON TECHNOLOGIES, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                   ALLIANCE ENGINEERING ASSOCIATES, INC.

                                   By:    /s/ Robert W. Raiford
                                       -------------------------------
                                   Name:  Robert W. Raiford
                                   Title: CFO

                                   Accepted in Dallas, Dallas County, Texas:

                                   AGENT:

                                   FLEET CAPITAL CORPORATION

                                   By:    /s/ Dan Hughes
                                       -------------------------------
                                   Name:  Dan A. Hughes
                                   Title: Vice President

                                   LENDERS:

                                   FLEET CAPITAL CORPORATION

                                   By:    /s/ Dan Hughes
                                       -------------------------------
                                   Name:  Dan A. Hughes
                                   Title: Vice President

                                       12

<PAGE>

                       CONSENT, RATIFICATION AND RELEASE

     Each of the undersigned hereby consents to the terms of the within and
foregoing Agreement, confirms and ratifies the terms of its guaranty agreement
relating to the Obligations and of each collateral document it has executed in
connection with the Obligations (collectively, the "Documents"), and
acknowledges that the Documents to which it is a party are in full force and
effect and ratifies the same, that it has no defense, counterclaim, set-off or
any other claim to diminish its liability under such Documents, that its consent
is not required to the effectiveness of the within and foregoing Agreement, and
that no consent by it is required for the effectiveness of any future amendment,
modification, forbearance or other action with respect to the Loans, the
Collateral, or any of the other Loan Documents. EACH OF THE UNDERSIGNED HEREBY
VOLUNTARILY AND KNOWINGLY RELEASES AND FOREVER DISCHARGES EACH OF AGENT AND EACH
LENDER, ITS PREDECESSORS, AGENTS, EMPLOYEES, SUCCESSORS AND ASSIGNS, FROM ALL
POSSIBLE CLAIMS, DEMANDS, ACTIONS, CAUSES OF ACTION, DAMAGES, COSTS, EXPENSES,
AND LIABILITIES WHATSOEVER, KNOWN OR UNKNOWN, ANTICIPATED OR UNANTICIPATED,
SUSPECTED OR UNSUSPECTED, FIXED, CONTINGENT, OR CONDITIONAL, AT LAW OR IN
EQUITY, ORIGINATING IN WHOLE OR IN PART ON OR BEFORE THE DATE THIS AGREEMENT IS
EXECUTED, WHICH THE UNDERSIGNED MAY NOW OR HEREAFTER HAVE AGAINST AGENT OR ANY
LENDER, ITS PREDECESSORS, AGENTS, EMPLOYEES, SUCCESSORS AND ASSIGNS, IF ANY, AND
IRRESPECTIVE OF WHETHER ANY SUCH CLAIMS ARISE OUT OF CONTRACT, TORT, VIOLATION
OF LAW OR REGULATIONS, OR OTHERWISE, AND ARISING FROM ANY "LOANS", INCLUDING,
WITHOUT LIMITATION, ANY CONTRACTING FOR, CHARGING, TAKING, RESERVING, COLLECTING
OR RECEIVING INTEREST IN EXCESS OF THE HIGHEST LAWFUL RATE APPLICABLE, THE
EXERCISE OF ANY RIGHTS AND REMEDIES UNDER THE LOAN AGREEMENT OR OTHER LOAN
DOCUMENTS, AND NEGOTIATION FOR AND EXECUTION OF THIS AGREEMENT.

                                       ENGLOBAL CORPORATION, formerly known as
                                       INDUSTRIAL DATA SYSTEMS CORPORATION

                                       By:   /s/ William A. Coskey
                                           -------------------------------------
                                             Name:    William A. Coskey
                                             Title:   President

                                                    IDS ENGINEERING, INC.

                                       By:  /s/ Robert W. Raiford
                                           -------------------------------------
                                             Name:    Robert W. Raiford
                                             Title: CFO

                                       13

<PAGE>

                                       THERMAIRE, INC.

                                       By:  /s/ Robert W. Raiford
                                           -------------------------------------
                                       Name:  Robert W. Raiford
                                       Title:  CFO

                                       CONSTANT POWER MANUFACTURING, INC.

                                       By:  /s/ Robert W. Raiford
                                           -------------------------------------
                                       Name:  Robert W. Raiford
                                       Title:  CFO

                                       INDUSTRIAL DATA SYSTEMS, INC.

                                       By:  /s/ Robert W. Raiford
                                           -------------------------------------
                                       Name:  Robert W. Raiford
                                       Title:  CFO

                                       IDS ENGINEERING MANAGEMENT, LC

                                       By:  /s/ Robert W. Raiford
                                           -------------------------------------
                                       Name:  Robert W. Raiford
                                       Title:  CFO

                                       14<PAGE>

                                                                   Exhibit 10.68

                      AMENDMENT TO INTERCREDITOR AGREEMENT

     THIS AMENDMENT TO INTERCREDITOR AGREEMENT ("this Amendment") is made and
entered into effective as of the 31st day of July, 2002, by and among FLEET
CAPITAL CORPORATION, a Rhode Island corporation, in its capacity as Agent and as
a lender under the Senior Loan Agreement (as hereinafter defined) (in each such
capacity, "Senior Lender"), EQUUS II INCORPORATED, a Delaware corporation
("Junior Lender"), PETROCON ENGINEERING, INC., a Texas corporation ("Borrower"),
and each of the following (hereinafter, together with Borrower, referred to
individually as a "Loan Party" and collectively as the "Loan Parties"): ENGLOBAL
CORPORATION, formerly known as INDUSTRIAL DATA SYSTEMS CORPORATION, a Nevada
corporation, INDUSTRIAL DATA SYSTEMS, INC., a Texas corporation, IDS
ENGINEERING, INC., a Texas corporation, THERMAIRE, INC., a Texas corporation,
CONSTANT POWER MANUFACTURING, INC., a Texas corporation, IDS ENGINEERING
MANAGEMENT, LC, a Texas limited liability company, TRIANGLE ENGINEERS AND
CONSTRUCTORS, INC., a Texas corporation, PETROCON SYSTEMS, INC., a Texas
corporation, PETROCON ENGINEERING OF LOUISIANA, INC., a Louisiana corporation,
R.P.M. ENGINEERING, INC., a Louisiana corporation, PETROCON CONSTRUCTION
RESOURCES, INC., a Texas corporation, PETROCON TECHNOLOGIES, INC., a Texas
corporation, and ALLIANCE ENGINEERING ASSOCIATES, INC., a Texas corporation.

                                    RECITALS

     A. Borrower is indebted to Senior Lender pursuant to that certain Loan and
Security Agreement, dated as of June 15, 1999, between Borrower, certain
subsidiaries of Borrower, and Senior Lender (as amended, restated, extended or
otherwise modified from time to time, including, without limitation, as amended
and restated by that certain Second Amended and Restated Loan and Security
Agreement, dated December 21, 2001, executed by Senior Lender, Borrower, et al.,
and as amended by that certain First Amendment to Second Amended and Restated
Loan and Security Agreement, dated March 26, 2002, executed by Senior Lender,
Borrower, et al., the "Senior Loan Agreement"). All of Borrower's and each other
Loan Party's obligations pursuant to the Senior Loan Agreement and the other
Senior Debt Documents (as defined in the hereinafter defined Intercreditor
Agreement) are secured by liens on and security interests in substantially all
of the now existing and hereafter acquired real and personal property of
Borrower and each other Loan Party (the "Collateral").

     B. Borrower is indebted to Junior Lender pursuant to that certain
Promissory Note, dated on or about December 21, 2001, in the original principal
amount of $3,000,000 (as amended, restated, extended or otherwise modified from
time to time, and including all notes issued in replacement of, or in
substitution for, the foregoing, collectively, the "Junior Term Note"), made by
Borrower to Junior Lender. All of Borrower's obligations pursuant to the Junior
Term Note are secured by liens on and security interests in the Collateral.

     C. Junior Lender, Senior Lender, and the Loan Parties have entered into
that certain Intercreditor Agreement, dated December 21, 2001 (the
"Intercreditor Agreement"), to set forth the relative rights and priorities of
the respective parties under the Junior Debt Documents (as

                                       1

<PAGE>

                      AMENDMENT TO INTERCREDITOR AGREEMENT

defined in the Intercreditor Agreement) and Senior Debt Documents (including,
without limitation, the relative priorities of each party's liens and security
interests in and to the Collateral).

     D. Senior Lender and the Loan Parties are executing on or about the date
hereof that certain Second Amendment to Second Amended and Restated Loan and
Security Agreement and Amendment to Other Loan Documents (the "Second Amendment
to Senior Loan Agreement"), whereby, among other things, the Senior Loan
Agreement and the revolving credit facility established thereby are each
extended through June 30, 2005.

     E. The consent of Junior Lender is required for such extension pursuant to
Section 10.1 of the Intercreditor Agreement, and Junior Lender has agreed to
give such consent.

     F. The parties hereto desire to amend Section 4 of the Intercreditor
Agreement.

     G. Accordingly, Senior Lender, Junior Lender and the Loan Parties desire to
amend the Intercreditor Agreement and enter into the agreements as hereinafter
set forth.

     NOW, THEREFORE, in consideration of the premises herein contained and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties, intending to be legally bound, agree as follows:

                                    ARTICLE I
                                   Definitions

     1.01 Capitalized terms used in this Amendment are defined in the
Intercreditor Agreement, as amended hereby, unless otherwise stated.

                                   ARTICLE II
               Amendment to Intercreditor Agreement and Consent by
           Junior Lender to Second Amendment to Senior Loan Agreement

     2.01 Permitted Payments to Junior Lender. Effective as of the date hereof,
Section 4 of the Intercreditor Agreement is hereby amended and restated to read
in its entirety as follows:

          "SECTION 4. Permitted Payments to Junior Lender. Except as otherwise
     provided in this Agreement, an Obligated Party may pay to Junior Lender
     when due, on a non-accelerated basis, payments of Junior Costs and Expenses
     and regularly scheduled payments of principal and interest on the Junior
     Term Note (in each case without giving effect to any amendment thereof not
     consented to in writing by Senior Lender); provided, however, except as
     permitted pursuant to the last sentence of this Section 4, in no event
     shall any Obligated Party pay, or Junior Lender take and retain, (i) any
     prepayment of principal on the Junior Term Note until the Senior Debt shall
     have been paid in full in cash or (ii) any scheduled payment of principal
     on the Junior Term Note until the Senior Term Loan shall have been paid in
     full in cash. Notwithstanding the foregoing, once each fiscal quarter
     Borrower may, if it chooses to do so, make

                                       2

<PAGE>

                      AMENDMENT TO INTERCREDITOR AGREEMENT

     a prepayment of principal on the Junior Term Note in an amount up to but
     not exceeding the Excess Availability (as hereinafter defined), provided
     each of the following is true: (i) the Average Daily Availability (as
     defined in the Senior Loan Agreement) for the preceding fiscal quarter
     exceeded $2,000,000 (the amount in excess of $2,000,000 being referred to
     herein as the `Excess Availability'), (ii) no Senior Event of Default
     exists on the date of such prepayment, and (iii) after making such
     prepayment, the Availability (as defined in the Senior Loan Agreement) on
     such date exceeds $2,000,000."

     2.02 Consent by Junior Lender to Second Amendment to Senior Loan Agreement.
Effective as of the date hereof, Junior Lender hereby consents to the execution
by Senior Lender and Loan Parties of the Second Amendment to Senior Loan
Agreement and to the consummation of the transactions contemplated therein,
including the extension of the Senior Loan Agreement and the revolving credit
facility established thereby through June 30, 2005.

                                   ARTICLE III
                                  Ratifications

     3.01 Ratifications. The terms and provisions set forth in this Amendment
shall modify and supersede all inconsistent terms and provisions set forth in
the Intercreditor Agreement, and except as expressly modified and superseded by
this Amendment, the terms and provisions of the Intercreditor Agreement are
ratified and confirmed and shall continue in full force and effect. Senior
Lender, Junior Lender and the Loan Parties agree that the Intercreditor
Agreement, as amended hereby, shall continue to be legal, valid, binding and
enforceable in accordance with its terms.

                                   ARTICLE IV
                            Miscellaneous Provisions

     4.01 Survival of Representations and Warranties. All representations and
warranties made in the Intercreditor Agreement shall survive the execution and
delivery of this Amendment.

     4.02 Severability. Any provision of this Amendment held by a court of
competent jurisdiction to be invalid or unenforceable shall not impair or
invalidate the remainder of this Amendment and the effect thereof shall be
confined to the provision so held to be invalid or unenforceable.

     4.03 Binding Obligations; Successors and Assigns. This Amendment shall be
immediately binding upon Junior Lender, the Loan Parties and Senior Lender and
their respective successors and assigns, and shall inure to the benefit of the
successors and assigns of Junior Lender, the Loan Parties and Senior Lender.

     4.04 Counterparts. This Amendment may be executed in one or more
counterparts, each of which when so executed shall be deemed to be an original,
but all of which when taken together shall constitute one and the same
instrument.

                                       3

<PAGE>
3

                      AMENDMENT TO INTERCREDITOR AGREEMENT

     4.05 Headings. The headings, captions, and arrangements used in this
Amendment are for convenience only and shall not affect the interpretation of
this Amendment.

     4.06 Applicable Law. This Amendment will be construed in accordance with
and governed by the law of the State of Texas.

     4.07 Final Agreement. The Intercreditor Agreement, as amended hereby,
represents the entire expression of the parties with respect to the subject
matter hereof on the date this amendment is executed. No modification,
rescission, waiver, release or amendment of any provision of this Amendment
shall be made, except by a written agreement signed by Senior Lender, Junior
Lender and the Loan Parties.

              [The Remainder of this Page Intentionally Left Blank]

                                       4

<PAGE>

                      AMENDMENT TO INTERCREDITOR AGREEMENT

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
Intercreditor Agreement to be duly executed by their proper and duly authorized
officers as of the day and year first above written.

                                        FLEET CAPITAL CORPORATION

                                        By:       /s/ Dan Hughes
                                            ------------------------------------
                                        Name:  Dan A. Hughes
                                        Title: Vice President

                                        EQUUS II INCORPORATED

                                        By:        /s/ Randall B. Hale
                                            ------------------------------------
                                        Name:  Randall B. Hale
                                        Title:  Vice President

                                        PETROCON ENGINEERING, INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                        ENGLOBAL CORPORATION, formerly known as
                                        INDUSTRIAL DATA SYSTEMS CORPORATION

                                        By:        /s/ William A. Coskey
                                            ------------------------------------
                                        Name:  William A. Coskey
                                        Title:  President

                                        IDS ENGINEERING, INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                        THERMAIRE, INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                       5

<PAGE>

                      AMENDMENT TO INTERCREDITOR AGREEMENT

                                        CONSTANT POWER MANUFACTURING, INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                        INDUSTRIAL DATA SYSTEMS, INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                        IDS ENGINEERING MANAGEMENT, LC

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                        TRIANGLE ENGINEERS AND CONSTRUCTORS,
                                         INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                        PETROCON SYSTEMS, INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                        PETROCON ENGINEERING OF LOUISIANA, INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                        R.P.M. ENGINEERING, INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                       6

<PAGE>

                      AMENDMENT TO INTERCREDITOR AGREEMENT

                                        PETROCON CONSTRUCTION RESOURCES, INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                        PETROCON TECHNOLOGIES, INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                        ALLIANCE ENGINEERING ASSOCIATES, INC.

                                        By:        /s/ Robert W. Raiford
                                            ------------------------------------
                                        Name:  Robert W. Raiford
                                        Title: CFO

                                       7

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