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                                                                   EXHIBIT 10.05

September 5, 2000

Earl C. Charles
19200 Bountiful Acres
Saratoga, CA 95070

Dear Earl,

All of us are very excited about you accepting the CFO position of our firm. I
have put in writing the compensation plan that we discussed.

POSITION:                          Senior Vice President, CFO

START DATE:                        To be determined, but as soon as possible

SALARY:                            BASE:  $300,000 per year.

                                   CASH INCENTIVE: $150,000 per year at 100% of
                                   goals. Goals to be mutually agreed upon
                                   between the Board and yourself. This
                                   incentive will be uncapped, so that if goals
                                   are exceeded, the cash incentive can be
                                   larger than $150,000 per year.

                                   ADDITIONAL BONUS: You will receive an
                                   additional bonus of $50,000 as an incentive
                                   to move towards an IPO as quickly as
                                   possible. This cash bonus will be payable on
                                   the first day of your employment.

SHARE OWNERSHIP:                   Cupertino Electric will offer to sell you
                                   301,278 shares (representing approximately 1%
                                   of the shares outstanding) at a price of
                                   $7.50 per share. These shares will be paid
                                   for with a note to Cupertino Electric at
                                   prime and secured by the stock and will vest
                                   at 25% per year for four years. The first 25%
                                   of the shares offered will become fully
                                   vested the day the company becomes public if
                                   earlier than one year from the start of your
                                   employment. You will also be asked to sign a
                                   form of shareholder agreement in connection
                                   with your shareholding which will provide for
                                   the vesting through repurchase rights and for
                                   other terms comparable to those of other
                                   shareholder executives in the company. It is
                                   our intent to also establish an employee
                                   stock option program in which you would be
                                   eligible for periodic option grants.

VEHICLE:                           An automobile will be provided in accordance
                                   with the Company's auto leasing policy. The
                                   monthly lease rate for your position is
                                   $800.00 per month.

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[LOGO]

Richard Powers
June 30, 2000
Page 2

MEDICAL
INSURANCE:                         You and your family will be eligible for
                                   major medical insurance as carried by CEI.

VACATION:                          Vacation eligibility and amount is per the
                                   CEI Employee Handbook.

PROFIT SHARING/
401K PLAN:                         You will be eligible for the 401K Plan per
                                   the summary plan's description of rules and
                                   regulations. You will become eligible for
                                   Profit Sharing after the completion of one
                                   full calendar year of service (January 1
                                   through December 31).

Cupertino Electric, Inc. is an at-will employer therefore you will be employed
on an at-will basis. Any other employment agreements beyond what is indicated
above must be made in writing and signed by both you and an officer of the
Company.

Once again Earl, we are all very excited about you becoming part of our team. We
are anxious to move forward with our IPO and beyond and feel that with you on
board, this will happen not only quickly but with great success.

Sincerely,

CUPERTINO ELECTRIC, INC.

/s/ JAMES S. RYLEY
-----------------------
James S. Ryley
Chief Executive Officer<PAGE>   1
                                                                  EXHIBIT 10.06

                         DEFERRED COMPENSATION AGREEMENT

THIS AGREEMENT is made and entered into this 27th day of December, 1994, by and
between SYNERGISM, INC., herein referred to as "Corporation" and EUGENE A.
RAVIZZA, herein referred to as "Employee."

                                    RECITALS

1.      Employee has been employed by Corporation upon terms mutually agreed
        upon from time to time by Corporation and Employee and has rendered
        valuable services to Corporation.

2.      Corporation wishes to encourage Employee to continue as an employee of
        Corporation and desires to retain the services of Employee realizing
        that if Employee were to enter into competition with Corporation,
        Corporation might suffer financial loss.

3.      Employee and Corporation's subsidiary CUPERTINO ELECTRIC entered into a
        prior Deferred Compensation Agreement dated March 26, 1971 and amended
        on August 9, 1973. Employee and Corporation wish to amend and restate
        said Deferred Compensation Agreement and said Amendment.

                                    AGREEMENT

1.      Employee and Corporation hereby agree to amend and restate the
        aforementioned Deferred Compensation Agreement and Amendment in
        accordance with the provisions of this Deferred Compensation Agreement
        as executed on the above date by the Employee and Corporation.

2.      Corporation hereby agrees to employ Employee as President or in such
        other capacity or position as the Board of Directors of Corporation may
        from time to time determine.

3.      At any time after Employee has provided ten (10) years of service to
        Corporation or attains age sixty (60), whichever occurs second, such
        date hereinafter referred to as the "retirement date," Employee may
        retire from active and daily service to Corporation. Upon such
        retirement date, Corporation shall pay to Employee a monthly pension of
        ten thousand dollars ($10,000.00) per month, payable on the first
        business day of each calendar month beginning the first month after the
        retirement date for the remainder of Employee's lifetime. If Employee
        should die after retirement date and Employee is married at Employee's
        death, Corporation will continue to make the monthly payments to
        Employee's spouse for the remainder of Employee's spouse's lifetime. If
        the said spouse does not survive Employee or survives Employee and
        thereafter dies, all benefits under this Agreement shall then terminate.

4.      If Employee should die while still in the active employment of the
        Corporation, but prior to the retirement date, Corporation will pay to
        Employee's spouse ten thousand dollars ($10,000.00) per month for the
        remainder of Employee's spouse's lifetime beginning the first month
        following the month in which Employee dies. If the said spouse does not

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        survive Employee or survives Employee and thereafter dies, all benefits
        under this Agreement shall then terminate.

5.      If Employee shall leave active employment of corporation prior to
        retirement date for any reason, this Agreement shall terminate;
        provided, however, that if such retirement is due to a permanent and
        total disability of Employee which prevents Employee from performing
        Employee's duties in a manner satisfactory to Corporation, then all the
        provisions of Paragraphs 3 and 4 of this Agreement shall remain in full
        force and effect, and that payments therein provided shall be made to
        Employee at the retirement date, or to the surviving spouse of Employee
        should Employee die before the retirement date, in the same manner as
        provided herein as if Employee had remained in the active employ of
        Corporation until the date of retirement or prior death.

        For purposes of this Paragraph, a determination by the Board of
        Directors of Corporation that the retirement of Employee is due to
        permanent and total disability shall be binding and conclusive upon all
        parties.

6.      Corporation's obligations to make payments hereunder are conditioned
        upon and shall terminate in the event of the breach of the following:

        Except with reference to permanent and total disability as specified in
        Paragraph 5 of this Agreement, Employee shall have continued in the
        active employ of Corporation until retirement date as prescribed
        hereunder, or until Employee's prior death.

        Absences due to illness, and leave of absence granted by the company
        shall not constitute a breach of this agreement.

7.      Employee, Employee's spouse, or any other beneficiary under this
        Agreement shall have no power to transfer, assign, anticipate,
        hypothecate, or otherwise encumber in advance any of the benefits
        payable hereunder, nor shall said benefits be subject to seizure for the
        payment of any debts or judgments, or be transferable by operation of
        law in the event of bankruptcy, insolvency, or otherwise.

8.      Nothing in this Agreement shall affect any right which Employee may
        otherwise have to participate in, or under, any other retirement plan or
        agreement which Corporation may now or hereafter have.

9.      Notwithstanding the provision of Paragraph 3 of this Agreement,
        Employee, with the consent of Corporation, may continue in active
        employment after the retirement date. In such event, Corporation may
        defer the start of the payments provided for under Paragraph 3 of this
        Agreement until the date of actual retirement.

10.     This Agreement shall be binding upon the parties hereto, their heirs,
        executors, administrators, successors or assigns. In the event of any
        consolidation or merger of Corporation into or with another corporation,
        or the sale of all or substantially all the stock of Corporation, or the
        sale of all or substantially all of the assets of Corporation, such
        successor corporation or buyer, as the case may be, shall assume this
        contract and

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        shall become obligated to perform all of the terms and conditions
        hereof, and Employee's obligation shall continue in favor of
        Corporation, or its successors or assigns.

11.     Notwithstanding any other provisions of this Agreement, Corporation
        reserves the right to terminate this Agreement or the Employee's
        employment at any time prior to Employee's retirement date, in which
        event this Agreement shall automatically terminate, and Corporation
        shall have no further obligation hereunder.

12.     The rights accruing to Employee or any designee under the provisions of
        this Agreement shall be solely those of an unsecured creditor of
        Corporation.

IN WITNESS WHEREOF, this Agreement has been executed by the parties on the date
first above written.

                                           SYNERGISM., INC.

                                           By: /s/ Eugene A. Ravizza
                                               -------------------------------
                                               PRESIDENT

                                           By: /s/ James S. Ryley
                                               -------------------------------
                                               SECRETARY

EMPLOYEE:

/s/ Eugene A. Ravizza
-------------------------------
EUGENE A. RAVIZZA

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