Document:

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Exhibit 10.42

                              CONSULTING AGREEMENT

         THIS CONSULTING AGREEMENT (the "Agreement") is made and entered into
this 1st day of January, 2003, by and between PLANET POLYMER TECHNOLOGIES, INC.,
a California corporation (the "Company"), and DR. ROBERT PETCAVICH
("Consultant") with respect to the following facts:

                                    RECITALS

         A.       Consultant has extensive experience and know-how related to
the intellectual property developed by the Company (the "Intellectual
Property").

         B.       Customers of the Company to whom the Company has sold and
licensed intellectual property (the "Customers") require ongoing support and
consulting services (the "Services").

         C.       The Company will enter into consulting agreements with the
Customers to provide such Services.

         D.       The Company desires to retain Consultant to provide the
Services to the Customers related to the Intellectual Property.

         E.       Consultant is willing and desires to provide the Services to
the Customers, and, from time to time, to the Company with prior authorization
from the Company's Board of Directors (the "Board"), upon the terms, covenants
and conditions hereinafter set forth.

                                    AGREEMENT

         NOW, THEREFORE, in consideration of the mutual terms, covenants and
conditions hereinafter set forth, the parties agree as follows:

         1.       Term and Amount of Service. The Company hereby retains
Consultant for a period of one (1) year beginning as of January 1, 2003 and
continuing until December 31, 2003 unless further extended or sooner terminated
as provided in Section 5 below (the "Term"). Upon request by the Customers, and
at times mutually agreed upon by the Customers and Consultant, Consultant shall
devote such time as is agreed to between the Customers and Consultant.
Consultation may be sought by each Customer over the telephone, in person at the
Consultant's office, at the Customer's offices or another reasonable location or
through written correspondence.

         2.       Services to Be Provided.

                  a.       To the Customers. Consultant agrees to provide the
Services to the Customers related to the Intellectual Property as the Customers
may request. All services provided by Consultant for the Customers are to be
performed solely pursuant to the terms and conditions of

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this Agreement and Consultant agrees not to contract directly with Customers to
provide Services during the term of this Agreement without the approval of
Company's President or Board of Directors. Consultant's provision of Services to
the Customers will be limited to the specific work to which each Customer and
the Company may agree.

                  b.       To the Company. Consultant may from time to time be
requested to provide the Services to the Company but only as the Company may
request with prior written authorization from the Board.

         3.       Consulting Fees. During the Term, the Company shall pay
Consultant consulting fees in accordance with paragraph a ., of this Section 3
below.

                  a.       Collected Fees Net of Expenses. While this Agreement
is in effect, the Company shall pay Consultant those consulting fees that the
Company collects from the Customers for Consultant's provision of Services to
the Customers, less any expenses the Company incurs in connection with
Consultant's provision of Services or the Company's collection of consulting
fees.

                  b.       Expense Reimbursement. Consultant shall charge and
seek reimbursement only from each Customer directly for expenses incurred in the
course of carrying out the Services for each Customer.

                  c.       Payment of Fees. Consulting fees and reimbursements
will be paid within five (5) business days of receipt of payment from each
Customer.

         4.       Independent Contractor; Withholding. Consultant will at all
times be an independent contractor, and as such will not have authority to bind
the Company or the Customers. Consultant will not act as an agent nor shall he
be deemed to be an employee of the Company or the Customers for the purposes of
any employee benefit program, unemployment benefits, or otherwise. Consultant
recognizes that no amount will be withheld from any compensation for payment of
any federal, state, or local taxes and that Consultant has sole responsibility
to pay such taxes, if any, and file such returns as shall be required by
applicable laws and regulations. Consultant shall not enter into any agreements
or incur any obligations on behalf of the Company.

         5.       Termination and Extension. The Term shall be sooner terminated
or further extended under the following circumstances:

                  a.       Termination for Cause. The Company shall be entitled,
with or without prior notice, to terminate this Agreement for cause, in which
case no consulting fees or other fees (other than such fees that have already
been earned by Consultant) shall be payable to Consultant after such
termination. "Cause" means Consultant's (i) gross negligence in the performance
or non-performance of any material duties to the Company; (ii) commission of any
material criminal act or fraud or of any act that affects adversely the
reputation of the Company; (iii) habitual neglect of his duties that he is
required to perform under this Agreement; (iv) dishonesty; or (v) gross
misconduct.

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Such termination shall not prejudice any other remedy under law or equity of the
Company and the failure of the Company to terminate Consultant when cause exists
shall not constitute the waiver of the Company's right to terminate this
Agreement at a later time. Termination under this section shall be considered
"for cause" for purposes of this Agreement.

                  b.       Extension of Term. The Term may be further extended
with the express authorization of the Board and Consultant.

         6.       Indemnification. In the event any person or entity who is not
a party to this Agreement makes any claim or demand, or brings any legal action,
arbitration, or other proceedings against Consultant relating solely to
Consultant's provision of the Services, the Company hereby agrees to indemnify
and hold Consultant harmless from all such third party claims, or claims by the
Company for indemnity regarding such third party claims, and all damages,
expenses, losses, liability, or attorneys' fees which Consultant may incur
therefrom (hereinafter collectively referred to as "liability"), except
liability which results from Consultant's negligence or Consultant's intentional
torts.

         7.       General Release. Except as expressly provided in this
Agreement, Consultant and the Company will and hereby do release each other and
their respective directors, officers, Consultants, agents, owners, successors or
assigns, and any related or subsidiary corporations (the "Released Parties")
from all claims, demands, warranties, debts, obligations, liabilities, costs,
expenses, rights of action, wages, vacation payments, commissions, overtime
payments, judgments, orders or liabilities of any kind of character whatsoever,
whether known or unknown, suspected or unsuspected, arising before the date of
this Agreement. Without limiting the generality of the foregoing release,
Consultant agrees to waive any right to recover based on state or federal age,
sex, disability, physical or mental handicap, sexual orientation, medical
condition, mental handicap or other anti-discrimination laws, including, without
limitation, Title VII, The Age Discrimination in Employment Act, The Americans
with Disabilities Act, and The California Fair Employment as well as the Older
Workers Benefit Protection Act and Housing Act, all as amended, whether such
claim be based upon an action filed by Consultant or by a governmental agency.
The foregoing release is not intended to and does not release Consultant from
any liability arising out of or in connection with any illegal acts committed by
Consultant.

         8.       Civil Code Waiver. Each party expressly waives and
relinquishes all rights and benefits afforded by Section 1542 of the Civil Code
of the State of California, and does so understanding and acknowledging the
significance of this specific waiver of Section 1542. Section 1542 of the Civil
Code of the State of California states as follows:

                  A general release does not extend to claims which the creditor
                  does not know or suspect to exist in his favor at the time of
                  executing the release, which, if known by him must have
                  materially affected his settlement with the debtor.

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         Thus, notwithstanding the provisions of Section 1542 and except as
expressly provided in this Agreement, and for the purpose of implementing a full
and complete release and discharge of the Released Parties, each party expressly
acknowledges that this Agreement is intended to include in its effect, without
limitation, all claims that any party does not know or suspect to exist in the
other party's favor at the time of execution of this Agreement, and this
Agreement contemplates the extinguishment of any of these claims.

         9.       Confidential Information. Consultant acknowledges that during
Consultant's employment and the Term of this Agreement, Consultant had and will
have access to and became acquainted with the Company's confidential and
proprietary information, including but not limited to the Company's products and
services, confidential information regarding its customers and other
compilations of information and records. In consideration of the covenants made
by the Company herein, Consultant agrees that (s)he shall not directly or
indirectly disclose or otherwise use the confidential and proprietary
information of the Company.

         10.      Relationship of the Parties. Nothing contained herein shall be
construed to place the parties in the relationship of employer/employee,
partners, or joint venturers. Except as otherwise provided in this Agreement,
the Company shall have no power to obligate or bind Consultant in any manner
whatsoever. Consultant shall have no power to obligate or bind Company in any
manner whatsoever, other than as provided by this Agreement.

         11.      Benefit and Assignment. This Agreement shall be binding upon
and inure to the benefit of the parties hereto and their respective successors.
The rights of the Company and Consultant hereunder may not be assigned without
the prior written consent of the other party.

         12.      Severability. Should any provision of this Agreement or
application thereof be declared invalid, void or unenforceable for any reason,
the validity and binding effect of the remaining portions shall not be affected
and the remaining portions of this Agreement shall remain in full force and
effect as if this Agreement had been executed with the invalid, void or
unenforceable provision eliminated. To this end, the provisions of this
Agreement are severable.

         13.      Governing Law. Except to the extent governed by the laws of
the United States, this Agreement is to be governed and construed under the
internal laws of the State of California and that venue shall be proper for all
purposes in San Diego County, California.

         14.      Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be an original, but all of which together
shall be the same document. Such counterparts may be executed and delivered in
person or via facsimile.

         15.      Entire Agreement. This Agreement constitutes the entire
agreement and understanding of the parties with respect to the subject matter
hereof and supersedes all prior oral or written agreements, arrangements, and
understandings with respect thereto. No representation, promise, inducement,
statement or intention has been made by any party hereto that is not embodied
herein, and no party shall be bound by or be liable for any alleged
representation, promise, inducement, or statement not set forth herein.

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         16.      Modification. This Agreement may not be modified, amended,
superseded, or cancelled, and none of the terms, covenants, representations,
warranties or conditions hereof may be waived, without a written instrument
executed by the party or parties to be bound by any such modification,
amendment, supersession, cancellation, or waiver.

         17.      Arbitration. Except as otherwise provided by law, any
controversy or claim arising out of or relating to this Agreement, the
relationship created hereby, the breach or termination thereof, or otherwise,
shall be settled by arbitration in San Diego County, California, in accordance
with the Rules of the American Arbitration Association, and judgment upon the
award rendered by the arbitrator(s) may be entered in any court having
jurisdiction thereof. BY AGREEING TO ARBITRATION UNDER THIS PARAGRAPH, BOTH
CONSULTANT AND THE COMPANY UNDERSTAND THAT THEY ARE AGREEING TO HAVE ANY DISPUTE
RELATING TO THIS AGREEMENT DECIDED BY A NEUTRAL ARBITRATOR, AND AS TO THOSE
DISPUTES DECIDED BY THE NEUTRAL ARBITRATOR, CONSULTANT AND THE COMPANY ARE
GIVING UP THEIR RIGHT TO A JURY OR COURT TRIAL AND, IN ADDITION, CONSULTANT AND
THE COMPANY WAIVE ANY RIGHT TO SEEK PUNITIVE DAMAGES.

         18.      Attorneys' Fees and Costs. In any arbitration or other action,
the prevailing party shall be entitled to recover from the losing party its
reasonable costs and actual attorneys' fees. The "prevailing party" means the
party determined by the arbitrator to have most nearly prevailed, even if such
party did not prevail in all matters, and not necessarily the one in whose favor
a judgment is rendered.

         19.      Waivers; Cumulative Remedies. The failure of any party to
exercise any of its rights hereunder or to enforce any of the terms or
conditions of this Agreement on any occasion shall not constitute or be deemed a
waiver of that party's rights thereafter to exercise any rights hereunder or to
enforce any and every term and condition of this Agreement. Any remedies
provided for herein are cumulative, and not in substitution for any other remedy
any party may have at law or in equity. No delay on the part of any party in
exercising any right, power or privilege granted hereunder shall operate as a
waiver thereof, nor shall any single or partial exercise of any such right,
power or privilege preclude any other or further exercise thereof.

         20.      Representation. The parties hereto acknowledge each has read
this Agreement, that each fully understands its rights, privileges and duties
under this Agreement, and that each enters into this Agreement freely and
voluntarily. Consultant further acknowledges he has had the opportunity to
consult with an attorney of his choice who is completely independent of and in
no way connected with the Company, to explain the terms of this Agreement and
the consequences of signing it.

         21.      Headings. All paragraph headings herein are inserted for
convenience only and shall not modify or affect the construction or
interpretation of any provision of this Agreement.

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         22.      Further Assurances. The parties agree that, from time to time
hereafter, and upon request, each of them will execute, acknowledge and deliver
such documents and other instruments and shall perform such acts and deeds as
may be reasonably required or desirable to effectuate the transactions
contemplated by this Agreement or to otherwise carry out the terms and
conditions of this Agreement.

                      [SIGNATURE PAGE TO FOLLOW THIS PAGE]

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                                 SIGNATURE PAGE

                                       TO

                              CONSULTING AGREEMENT

         IN WITNESS WHEREOF, the parties hereto have caused this Consulting
Agreement to be executed as of the date first set forth above.

                                           CONSULTANT:

                                           _________________________________
                                                Dr. Robert Petcavich

                                           THE COMPANY:

                                           PLANET POLYMER TECHNOLOGIES, INC.

                                           By:______________________________
                                                H. Mac Busby

                                        7<PAGE>
                                                                   Exhibit 10.52

As of February 1, 2003

Nextera Enterprises, Inc.
4 Cambridge Center, 3rd Fl.
Cambridge, Mass  02142
Attn:  Mr. Michael Muldowney, CFO

Dear Michael:

     The purpose of this letter is to set forth the terms and conditions under
which I have agreed to accept the Board's election as Vice Chairman of the Board
of Nextera Enterprises, Inc. ("Company") as follows:

     1. I agree to serve as Vice Chairman of the Board on a month to month basis
        from the effective date hereof until 30 days after I have either
        resigned from said position or been removed from said position by action
        of the Board of Directors.

     2. My responsibilities will include taking the lead on negotiations of
        contract renewals with key personnel in Boston; maintaining regular
        telephone contact with both the CEO and CFO of the Company regarding
        strategic matters, financial matters, operations issues, outstanding
        real estate issues, and other issues and problems that may arise from
        time to time; participating on a new executive team to be made up of a
        representative from each office of Lexecon and the CFO to explore
        synergies and resolve conflicts that may arise from time to time between
        the offices; and to be actively involved with the Company's investment
        banker in developing and executing strategies to develop additional
        liquidity for the Company.
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Nextera Enterprises, Inc.
As of February 1, 2003
Page 2

     3. It is understood and agreed that I will maintain my affiliation
        with Maron & Sandler and other business affiliations that I may have
        consistent with my obligations to the Company.

     4. I will be compensated during the period of time that I serve as Vice
        Chairman of the Company in the amount of $20,000 per month or such other
        amount as may be agreed to by the Compensation Committee of the Board
        from time to time.  Said amount will be paid monthly in arrears directly
        to me.  During such period as I serve as Vice Chairman, I agree that I
        will not be paid any additional directors fees for serving as a director
        of the Company, nor bill the Company through Maron & Sandler for any of
        the time that I spend on Company matters. The Company will reimburse me
        for any out of pocket expenses I may incur, including but not limited to
        expenses of travel on behalf of the Company.

     5. The Company shall indemnify me in connection with my position with the
        Company and provide appropriate directors and officers insurance in an
        amount acceptable to me at all times during the term hereof.

     If the foregoing is in accordance with your understanding of our
arrangement, please confirm by signing where indicated below and returning to me
a duplicate of this letter.

                                                          Very truly yours,

                                                          /s/ Richard V. Sandler
                                                          ----------------------
                                                              Richard V. Sandler

RVS:jr

Accepted and agreed to:

By:/s/ Michael Muldowney
------------------------
       Michael Muldowney

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