Document:

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                                                                   EXHIBIT 10.11

                      OBJECTIVE SYSTEMS INTEGRATORS, INC.

                              SEVERANCE AGREEMENT
                              -------------------

THIS AGREEMENT is entered into as of March 15, 2000 ("Effective Date"), between
OBJECTIVE SYSTEMS INTEGRATORS, INC., a Delaware corporation ("OSI"), and BUD J
MULLANIX ("Officer").

                                    RECITALS
                                    --------

Officer serves as OSI's Vice President, Human Resources.  The parties wish to
set forth the terms of Officer's compensation if his employment ends because of
a Change in Control.  If a Change in Control occurs, Officer and other key
employees will be more vulnerable to dismissal without regard to the quality of
their service.  Because key employees are in a unique position to affect the
efforts of others, OSI's Board of Directors ("Board") believes it is in the best
interests of OSI and its shareholders to ensure the fair treatment of key
employees and to reduce the adverse effects on their performance inherent in an
acquisition or a change in control.

                                   AGREEMENT
                                   ---------

1. Definitions.  For purposes of this Agreement, the following terms have the
   -----------
   meanings set forth below:

  (a)    a "Change in Control" will occur if (1) any person, as that term is
            -----------------
         used in Section 13(d) and 14(d)(2) of the Securities and Exchange Act
         of 1934 ("Exchange Act"), other than OSI, is or becomes the beneficial
         owner, as defined in Rule 13(d)3 under the Exchange Act, either
         directly or indirectly (including by holding securities which are
         exerciseable for or convertible into shares of OSI capital stock), of
         50% or more of the combined voting power of the outstanding shares of
         OSI's capital stock entitled to vote generally in the election of
         directors (calculated as provided in Rule 13(d) under the Exchange Act
         in the case of rights to acquire capital stock), whether by means of a
         tender offer or exchange offer, a Transaction or otherwise, (2) a
         Transaction is consummated, (3) the Continuing Directors do not
         constitute a majority of the Board for any reason and at any time
         during the term of this Agreement, or (4) a majority of OSI's Outside
         Directors decide that a Change of Control has occurred.

  (b)    "Compensation" includes all wages, salary, bonuses and incentive
          ------------
         compensation paid by OSI as consideration for the Officer's service
         that are included in the Officer's gross income for federal income tax
         purposes, but excludes any taxable income recognized on the exercise of
         stock options or the disposition of shares acquired on the exercise of
         stock options.

  (c)    a "Continuing Director" is (1) a member of the Board serving on
            -------------------
         December 15, 1999, or (2) a person who is thereafter elected by the
         shareholders or appointed by the Board where the election or
         appointment was approved by at least a majority of the Continuing
         Directors then serving on the Board.

  (d)    "Disability" means that the Officer, in the reasonable judgment of the
          ----------
         Board, is not able to perform the duties of his office by reason of
         illness or physical or mental disability, where the condition has
         continued for a period of more than three consecutive months.

  (e)    "Good Reason" includes any of the following:
          -----------

         (1)  assignment to the Officer of significantly reduced duties, or a
              substantial reduction in the nature or status of, the Officer's
              responsibilities immediately before a Change in Control. In this
              regard, a reduction in duties or responsibilities only by virtue
              of OSI being acquired and made a part of a larger entity (as, for
              example, the Chief Financial Officer of OSI remains as such
              following the Change in Control and is not made the Chief
              Financial Officer of the acquirer) will constitute "Good Reason"
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         (2)  reduction in the Officer's salary or a material reduction in his
              other benefits taken as a whole, as in effect on the date of a
              Change in Control.

         (3)  relocation of OSI's principal executive offices outside of the
              Greater Sacramento area.

         (4)  relocation of the Officer to any place other than the principal
              offices of OSI, except for reasonably required travel by the
              Officer on OSI's business

         (5)  breach by OSI of this Agreement, if the breach has not been cured
              within 30 days after notice setting forth with specificity the
              nature of the breach.

         (6)  failure by OSI to obtain the assumption of this Agreement by any
              successor or assign of OSI.

  (f)    "Outside Director" is a person who is not, and who during the past six
          ----------------
         months was not, an employee or officer of OSI.

  (g)    "Termination for Cause" is termination of the Officer's employment as a
          ---------------------
         result of (1) an act of intentional personal dishonesty by the Officer
         in connection with his responsibilities as an employee and intended to
         result in his substantial personal enrichment, (2) his conviction of a
         felony, (3) a willful act by the Officer which constitutes gross
         misconduct and which is more than of de minimus injury to OSI, or (4)
         continued substantial violations of his employment duties (that have
         been previously communicated to him in writing, are consistent with his
         position as an Officer of OSI and that are neither illegal, immoral nor
         wrongful), that are demonstrably willful and deliberate on his part and
         that have continued for 30 days after OSI has delivered to him a
         written demand for performance, specifically setting forth the factual
         basis for OSI's belief that he has not performed his duties.

  (h)    "Termination on a Change in Control" is (1) termination by the Officer
          ----------------------------------
         of his employment for Good Reason within two years after the occurrence
         of a Change in Control, or (2) termination by OSI of the Officer's
         employment within two years after the occurrence of a Change in Control
         other than a Termination for Cause or a termination resulting from his
         death or Disability.

  (i)    a "Transaction" is (1) a consolidation or merger involving OSI, other
            -----------
         than a merger solely to effect a reincorporation or a merger as to
         which stockholder approval is not required under Sections 251(f) or 253
         of the Delaware General Corporation Law, (2) a sale, lease, exchange or
         other transfer (in one transaction or a series of related transactions)
         of 50% or more of OSI's assets, or (3) the adoption of any plan or
         proposal for the liquidation or dissolution of OSI.

2. Term.  If no Change in Control has occurred, this Agreement will expire three
   ----
   years from its Effective Date.  This Agreement will be automatically renewed
   for successive one-year periods unless either party has given the other six
   months prior notice of its election not to renew.  If a Change in Control
   occurs, this Agreement will continue in effect, and will not terminate, until
   the Officer has received the severance compensation provided for below.

3. Termination on a Change in Control.  If a Termination for a Change in Control
   ----------------------------------
   occurs, the Officer will immediately be paid all accrued salary, bonus
   compensation to the extent earned, vested deferred compensation (other than
   pension plan or profit sharing plan benefits, which will be paid in
   accordance with the applicable plan), any benefits then due under any OSI
   plans in which the Officer participates, accrued vacation pay and any
   appropriate business expenses incurred by the Officer in connection with his
   duties, all to the date of termination ("Accrued Compensation").  The Officer
   will also be entitled to the severance compensation described in Section 4.

4. Severance Compensation.  If a Termination on a Change in Control occurs, OSI
   ----------------------
   will pay severance compensation to the Officer in an aggregate amount equal
   to the Officer's Compensation for 12 months.  Severance compensation will be
   computed with reference to the Compensation paid to the Officer for the last
   full calendar month immediately preceding the month in which the Change in
   Control occurs or the month in which the Officer's employment terminates,
   whichever is higher.  Compensation as to any month will include one-twelfth
   of the amount of any bonus or other lump sum compensation received by the
   Officer
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    during the preceding 12 months and all amounts accrued with respect to that
    month under any deferred compensation plan. Severance compensation will be
    without prejudice to the Officer's right to receive accrued Compensation
    earned and unpaid at the time of termination. Severance compensation
    payments to the Officer will be paid in a lump sum within 30 days after
    Termination on a Change in Control.

5.  Other Provisions.  In addition to the severance payments described above,
    ----------------
    the Officer will receive 100% OSI-paid benefits in the same or comparable
    plans as provided to him immediately before the Termination on a Change in
    Control. If the Officer's health insurance coverage included his dependents,
    those dependents will also be covered at OSI's expense. Coverage under this
    Section will continue for 12 months after termination; provided, however,
    that coverage will end on the date the Officer and any covered dependents
    become covered under any similar plan not maintained by OSI.

6.  Acceleration of Options.  If a Termination on a Change in Control occurs,
    -----------------------
    all stock option agreements will be amended to provide that the stock
    options held by the Officer immediately before the termination will become
    fully vested and exerciseable, even if the vesting conditions set forth in
    the underlying stock option agreements have not been satisfied in full, and
    will remain exerciseable for a period of 12 months after the Termination on
    a Change in Control and for a period of 24 months if the termination results
    from the Officer's Disability, but in no event longer than the original term
    of the option.

7.  Aggregate Benefit Cap. If the benefits provided for in this Agreement or
    ---------------------
    otherwise payable to the Officer constitute "parachute payments" within the
    meaning of Section 280G of the Internal Revenue Code of 1986, as amended
    ("Code"), and will be subject to the excise tax imposed by Section 4999 of
    the Code, the Officer will receive a payment from OSI sufficient to pay the
    initial excise tax ("Gross-Up"), but no further payments from OSI with
    respect to the Gross-Up. Unless OSI and the Officer otherwise agree in
    writing, determination of the Officer's excise tax liability and the amount
    required to be paid under this Section will be made, in writing, by the same
    firm of independent public accountants who were employed by OSI immediately
    before the Change of Control ("Accountants"). For purposes of making their
    calculations, the Accountants may make reasonable assumptions and
    approximations concerning applicable taxes and may rely on reasonable, good
    faith interpretations concerning the application of Sections 280G and 4999
    of the Code. OSI and the Officer will furnish the Accountants with such
    information and documents as the Accountants may reasonably request. OSI
    will bear all costs the Accountants reasonably incur in connection with
    these calculations.

8.  Other Benefits.  Neither this Agreement nor the severance compensation that
    --------------
    it provides for will reduce any amounts otherwise payable, or in any way
    diminish the Officer's rights as an employee of OSI, whether existing now or
    hereafter, under any benefit, incentive, retirement, stock option, stock
    bonus or stock purchase plan or under any employment agreement or other plan
    or arrangement.

9.  Employment Status.  This Agreement does not constitute a contract of
    -----------------
    employment.  It does not impose on OSI any obligation to retain the Officer
    as an employee, to change the status of his employment or to change OSI's
    policies regarding termination of employment.

10. Miscellaneous.
    -------------

   (a)    Severability.  If a court or other body of competent jurisdiction
          ------------
          determines that any term of this Agreement is invalid or
          unenforceable, that term will be adjusted rather than voided, if
          possible, so that it is enforceable to the maximum extent possible,
          and all other terms of the Agreement will be deemed valid and
          enforceable to the fullest extent possible.

   (b)    Withholding.  Compensation and benefits to the Officer under this
          -----------
          Agreement will be reduced by all federal, state, local and other
          withholdings or similar taxes as required by applicable law.

   (d)    Entire Agreement.  This Agreement is the entire agreement between the
          -----------------
          parties with respect to its subject matter and may be amended,
          modified, superseded or canceled, or its terms waived, only by a
          written instrument executed by each party or, in the case of a waiver,
          by the party waiving compliance. Failure of a party at any time to
          require performance of any term of this Agreement will not affect the
          right at a latter time to enforce the same. No waiver of a breach of
          this Agreement, whether by conduct or otherwise, in any one or more
          instances will be construed as a further or continuing waiver of the
          breach or of any other term of this Agreement.
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   (c)    Counterparts.  This Agreement may be executed in one or more
          ------------
          counterparts, each of which will constitute an original.

   (d)    Successors and Assigns.  This Agreement will be binding on OSI, its
          ----------------------
          successors and assigns, and will inure to the benefit of the Officer
          and his estate, heirs, legal representatives and assigns.

   (e)    Notices.  All notices, requests, demands and other communications
          -------
          under this Agreement will be in writing, will be effective on receipt
          and will be delivered by Federal Express or a similar courier,
          personal delivery, certified or registered mail or by facsimile
          transmission. Addresses for notice to either party are as shown on the
          signature page of this Agreement or as subsequently modified by
          written notice.

   (f)    Jurisdiction.  The parties each irrevocably consent to the
          ------------
          jurisdiction of the courts of the State of California for all purposes
          in connection with any action or proceeding arising out of or relating
          to this Agreement. Any action instituted under this Agreement will be
          brought only in the state courts of the State of California.

   (g)    Governing Law.  This Agreement will be governed by, and its provisions
          -------------
          construed in accordance with, the laws of the State of California as
          applied to contracts between California residents entered into and to
          be performed entirely within California.

IN WITNESS WHEREOF, the parties have executed this Agreement as of December 15,
1999.

OBJECTIVE SYSTEMS INTEGRATORS, INC.,

By:    /s/ Richard G. Vento
   -----------------------------
Title:
       -------------------------
Date:
       -------------------------

Address for Notices:  101 Park Way
                      Folsom, California  95630
                      Attention:  General Counsel

OFFICER

/s/ Bud J. Mullanix
---------------------------------------
Bud J. Mullanix

Address for Notices:<PAGE>

                                                                   EXHIBIT 10.12

                      OBJECTIVE SYSTEMS INTEGRATORS, INC.
                      -----------------------------------

                           INDEMNIFICATION AGREEMENT
                           -------------------------

THIS INDEMNIFICATION AGREEMENT ("Agreement") is effective as of ______________,
by and between OBJECTIVE SYSTEMS INTEGRATORS, INC., a Delaware corporation
("OSI"), and BUD MULLANIX  ("Indemnitee").

WHEREAS, OSI desires to attract and retain the services of highly qualified
individuals, such as Indemnitee, to serve OSI and its related entities;

WHEREAS, OSI and Indemnitee recognize the continued difficulty in obtaining
liability insurance for OSI's directors, officers, employees, agents and
fiduciaries, the significant increases in the cost of that insurance and the
general reductions in the coverage of that insurance;

WHEREAS, OSI and Indemnitee further recognize the substantial increase in
corporate litigation in general, subjecting directors, officers, employees,
agents and fiduciaries to expensive litigation risks at the same time as the
availability and coverage of liability insurance has been severely limited; and

WHEREAS, in connection with OSI's reincorporation, OSI and Indemnitee desire to
continue having in place the additional protection provided by an
indemnification agreement to provide Indemnitee with indemnification and
advancement of expenses to the maximum extent permitted by Delaware law;

NOW, THEREFORE, OSI and Indemnitee agree as set forth below.

1. Definitions.
   -----------

   (a) Change in Control.  A "Change in Control" will be deemed to have occurred
       -----------------
       if, on or after the date of this Agreement, (1) any "person," as that
       term is used in Sections 13(d) and 14(d) of the Securities Exchange Act
       of 1934, as amended (the "Act"), or group acting in concert, other than a
       trustee or other fiduciary holding securities under an OSI employee
       benefit plan acting in that capacity or a corporation owned directly or
       indirectly by the stockholders of OSI in substantially the same
       proportions as their ownership of stock of OSI, becomes the "beneficial
       owner" (as defined in Rule 13d-3 under the Act), directly or indirectly,
       of OSI securities representing more than 50% of the total voting power
       represented by OSI's then outstanding Voting Securities, (2) during any
       period of two consecutive years, individuals who at the start of the
       period constitute the OSI Board of Directors, and any new director whose
       election by the Board of Directors or nomination for election by OSI's
       stockholders was approved by a vote of at least two thirds (2/3) of the
       directors then still in office who either were directors at the start of
       the period or whose election or nomination for election was previously so
       approved, cease for any reason to constitute a majority of OSI's Board of
       Directors, (3) the OSI stockholders approve a merger or consolidation of
       OSI with another corporation, other than a merger or consolidation that
       would result in the OSI Voting Securities outstanding immediately before
       the approval continuing to represent (either by remaining outstanding or
       by being converted into Voting Securities of the surviving entity) at
       least 80% of the total voting power represented by the Voting Securities
       of OSI or the surviving entity outstanding immediately after the merger
       or consolidation, or (4) the OSI stockholders approve a plan of complete
       liquidation of OSI or an agreement for the sale or disposition by OSI (in
       one transaction or a series of related transactions) of all or
       substantially all of OSI's assets.

                                  OSI Delaware Indemnification Agreement: Page 1
<PAGE>

   (b) Claim.  With respect to a Covered Event, a "Claim" is any threatened,
       -----
       pending or completed action, suit, proceeding or alternative dispute
       resolution mechanism, or any hearing, inquiry or investigation that
       Indemnitee in good faith believes might lead to the institution of such
       an action, suit, proceeding or alternative dispute resolution mechanism,
       whether civil, criminal, administrative, investigative or other.

   (c) OSI.  References to "OSI" include, in addition to Objective Systems
       ---
       Integrators, Inc., any constituent corporation (including any constituent
       of a constituent) absorbed in a consolidation or merger to which
       Objective Systems Integrators, Inc. (or any of its wholly owned
       subsidiaries) is a party and which, if its separate existence had
       continued, would have had power and authority to indemnify its directors,
       officers, employees, agents or fiduciaries, so that if Indemnitee is or
       was a director, officer, employee, agent or fiduciary of the constituent
       corporation, or is or was serving at the request of the constituent
       corporation as a director, officer, employee, agent or fiduciary of
       another corporation, partnership, joint venture, employee benefit plan,
       trust or other enterprise, Indemnitee will stand in the same position
       under this Agreement with respect to the resulting or surviving
       corporation as Indemnitee would have stood with respect to the
       constituent corporation if its separate existence had continued.

   (d) Covered Event.  A "Covered Event" is any event or occurrence related to
       -------------
       the fact that Indemnitee is or was a director, officer, employee, agent
       or fiduciary of OSI, or any subsidiary of OSI, or is or was serving at
       the request of OSI as a director, officer, employee, agent or fiduciary
       of any other corporation, partnership, joint venture, trust or other
       enterprise, or by reason of any action or inaction on the part of
       Indemnitee while serving in that capacity.

   (e) Expenses.  "Expenses" are any and all expenses (including attorneys' fees
       --------
       and all other costs, expenses and obligations incurred in connection with
       investigating, defending, being a witness in or participating in
       (including on appeal), or preparing to defend, be a witness in or
       participate in, any action, suit, proceeding, alternative dispute
       resolution mechanism, hearing, inquiry or investigation), judgments,
       fines, penalties and amounts paid in settlement (if the settlement is
       approved in advance by OSI, which approval will not be unreasonably
       withheld) of any Claim and any federal, state, local or foreign taxes
       imposed on Indemnitee as a result of the actual or deemed receipt of any
       payments under this Agreement.

   (f) Expense Advance.  "Expense Advance" is a payment to Indemnitee under
       ---------------
       Section 3 of Expenses in advance of settlement or final judgment in any
       action, suit, proceeding or alternative dispute resolution mechanism,
       hearing, inquiry or investigation which is a Claim.

   (g) Independent Legal Counsel.  "Independent Legal Counsel" is an attorney or
       -------------------------
       firm of attorneys, selected in accordance with Section 2(d), who will not
       have otherwise performed services for OSI or Indemnitee within the last
       three years (other than with respect to matters concerning the rights of
       Indemnitee under this Agreement or of other Indemnitees under similar
       indemnity agreements).

   (h) Other Enterprises.  References to "other enterprises" include employee
       -----------------
       benefit plans; references to "fines" include any excise taxes assessed on
       Indemnitee with respect to an employee benefit plan; and references to
       "serving at the request of OSI" include any service as a director,
       officer, employee, agent or fiduciary of OSI which imposes duties on, or
       involves services by, the director, officer, employee, agent or fiduciary
       with respect to an employee benefit plan, its participants or its
       beneficiaries; and if Indemnitee acted in good

                                 OSI Delaware Indemnification Agreement: Page 2
<PAGE>

       faith and in a manner Indemnitee reasonably believed to be in the
       interest of the participants and beneficiaries of an employee benefit
       plan, Indemnitee will be deemed to have acted in a manner "not opposed to
       the best interests of OSI" under this Agreement.

   (i) Reviewing Party.  Subject Section 2(d), a "Reviewing Party" is any person
       ---------------
       or body appointed by the Board of Directors in accordance with applicable
       law to review OSI's obligations under this Agreement and under applicable
       law, which may include members of OSI's Board of Directors, Independent
       Legal Counsel or any other person or body not a party to the particular
       Claim for which Indemnitee is seeking indemnification.

   (j) Section.  Unless otherwise indicated, "Section" refers to a section of
       -------
       this Agreement.

   (k) Voting Securities.  "Voting Securities" are any securities of OSI that
       -----------------
       vote generally in the election of directors.

2.  Indemnification.
    ---------------

   (a) Expense Indemnification.  Subject to the provisions of Section 2(b), OSI
       -----------------------
       will indemnify Indemnitee for Expenses to the fullest extent permitted by
       law if Indemnitee was, is or becomes a party to or witness or other
       participant in, or is threatened to be made a party to or witness or
       other participant in, any Claim (whether by reason of or arising in part
       out of a Covered Event), including all interest, assessments and other
       charges paid or payable in connection with or in respect of those
       Expenses.

   (b) Review of Obligations.  Notwithstanding the foregoing, if any Reviewing
       ---------------------
       Party has determined (in a written opinion where Independent Legal
       Counsel is the Reviewing Party) that applicable law prohibits Indemnitee
       from being entitled to be indemnified under this Agreement, (1) OSI will
       have no obligation under Section 2(a) to make further payments to
       Indemnitee after the determination by the Reviewing Party, and (2) OSI
       will be entitled to be reimbursed by Indemnitee (who agrees to reimburse
       OSI) for all Expenses previously paid to Indemnitee to which Indemnitee
       is not entitled; provided, however, that if Indemnitee has commenced or
       thereafter commences legal proceedings in a court of competent
       jurisdiction to secure a determination that applicable law permits
       Indemnitee to be indemnified under this Agreement, the determination made
       by the Reviewing Party that Indemnitee is not entitled to be indemnified
       will not be binding and Indemnitee will not be required to reimburse OSI
       for any previously paid Expenses until a final judicial determination is
       made with respect thereto (as to which all rights of appeal have been
       exhausted or lapsed).  Indemnitee's obligation to reimburse OSI for
       Expenses will be unsecured and no interest will be charged.

   (c) Unfavorable Determination; Binding Effect.  If a Reviewing Party
       -----------------------------------------
       determines that applicable law substantively prohibits Indemnitee from
       being indemnified under this Agreement, either in whole or in part,
       Indemnitee may commence litigation seeking an initial determination by
       the court or challenging the Reviewing Party's determination (or any
       aspect of that determination, including the legal or factual bases for
       it) and, subject to Section 15, OSI consents to service of process and to
       appear in the litigation.  Absent litigation, determinations by a
       Reviewing Party will be conclusive and binding on OSI and Indemnitee.

                                 OSI Delaware Indemnification Agreement: Page 3
<PAGE>

   (d) Selection; Change in Control.  If there has not been a Change in
       ----------------------------
       Control, the Reviewing Party will be selected by the Board of Directors.
       If there has been a Change in Control (other than a Change in Control
       which has been approved by a majority of OSI's Board of Directors who
       were directors immediately before the Change in Control), the Reviewing
       Party for all matters concerning the rights of Indemnitee to
       indemnification of Expenses under this Agreement, any other agreement or
       under OSI's Certificate of Incorporation or Bylaws as now or later in
       effect, or under any other applicable law, if desired by Indemnitee, will
       be Independent Legal Counsel selected by Indemnitee and approved by OSI
       (which approval will not be unreasonably withheld).  Among other things,
       Independent Legal Counsel will render its written opinion to OSI and
       Indemnitee as to whether and to what extent applicable law permits
       Indemnitee to be indemnified under this Agreement.  OSI will abide by
       that opinion, pay the reasonable fees of the Independent Legal Counsel
       and indemnify fully that Counsel against all expenses (including
       attorneys' fees), claims, liabilities and damages arising out of or
       relating to this Agreement or its engagement under it.  Notwithstanding
       any other provision of this Agreement, OSI will not be required to pay
       Expenses of more than one Independent Legal Counsel for Indemnitee, and
       that Independent Legal Counsel will be the Independent Legal Counsel for
       all other Indemnitees unless (1) employment of separate counsel by one or
       more Indemnitees has been previously authorized by OSI in writing, or (2)
       an Indemnitee has provided OSI with a written statement that the
       Indemnitee has reasonably concluded there may be a conflict of interest
       between the Indemnitee and the other Indemnitees with respect to the
       matters arising under this Agreement.

   (e) Mandatory Payment.  Notwithstanding any other provision of this Agreement
       -----------------
       other than Section 10, to the extent that Indemnitee has been successful
       on the merits or otherwise, including, without limitation, the dismissal
       of an action without prejudice, in defense of a Claim, Indemnitee will be
       indemnified against all Expenses incurred by Indemnitee in connection
       with the Claim.

3. Expense Advances.
   ----------------

   (a) Obligation to Make Advances.  OSI will make Expense Advances to
       ---------------------------
       Indemnitee on receiving a written undertaking, by or on behalf of
       Indemnitee, to repay the Advances if it is ultimately determined that
       applicable law prohibits Indemnitee from being indemnified for them by
       OSI.

   (b) Form of Undertaking.  The obligation to repay Expense Advances under
       -------------------
       Indemnitee's written undertaking will be unsecured and no interest will
       be charged.

   (c) Reasonable Expense Advances.  For Expense Advances where Indemnitee has
       ---------------------------
       made written demand to OSI in accordance with this Agreement, all
       Expenses included in the Expense Advance will be presumed conclusively to
       be reasonable if they are certified as being so by affidavit of
       Indemnitee's counsel.

4. Procedures for Indemnification and Expense Advances.
   ---------------------------------------------------

   (a) Timing.  All Expense payments (including, without limitation, Expense
       ------
       Advances) by OSI to Indemnitee under this Agreement will be made to the
       fullest extent permitted by law as soon as practicable after written
       demand by Indemnitee is presented to OSI.  In no event, will payment be
       made later than 30 business days after written demand, except for Expense
       Advances, which will be made no later than 10 business days after written
       demand.

                                 OSI Delaware Indemnification Agreement: Page 4
<PAGE>

   (b) Notice/Cooperation.  As a condition precedent to indemnification or the
       ------------------
       receipt of Expense Advances, Indemnitee will give OSI notice as soon as
       practicable of any Claim made against Indemnitee for which
       indemnification under this Agreement could be sought.  Notice will be
       directed to OSI's Chief Executive Officer at the address shown on the
       signature page of this Agreement (or such other address as OSI designates
       in writing to Indemnitee).  In addition, Indemnitee will give OSI such
       information and cooperation as OSI may reasonably require and is within
       Indemnitee's power.

   (c) No Presumptions; Burden of Proof.  For purposes of this Agreement, the
       --------------------------------
       termination of any Claim by judgment, order, settlement (whether with or
       without court approval) or conviction, or on a plea of nolo contendere or
                                                              ---------------
       its equivalent, will not create a presumption that Indemnitee failed to
       meet any particular standard of conduct or had any particular belief, or
       that a court has determined that indemnification is not permitted by this
       Agreement or applicable law.  In addition, neither the failure of a
       Reviewing Party to have determined whether Indemnitee has met any
       particular standard of conduct or had any particular belief, nor an
       actual determination by a Reviewing Party that Indemnitee has not met
       that standard of conduct or did not have that belief, before the start of
       legal proceedings by Indemnitee to secure a judicial determination that
       Indemnitee should be indemnified under this Agreement under applicable
       law, will be a defense to Indemnitee's claim or create a presumption that
       Indemnitee has not met a particular standard of conduct or did not have a
       particular belief.  In connection with a determination by a Reviewing
       Party, or otherwise, as to whether applicable law permits Indemnitee to
       be indemnified under this Agreement, the burden of proof will be on OSI
       to establish that Indemnitee is not entitled to indemnification.

   (d) Notice to Insurers.  If, at the time OSI receives notice of a Claim under
       ------------------
       Section 4(b), OSI has liability insurance in effect which may cover the
       Claim, OSI will give prompt notice that the Claim has commenced to the
       insurers according to the procedures set forth in each respective policy.
       OSI will thereafter take all necessary or desirable action to cause the
       insurers to pay, on behalf of Indemnitee, all amounts payable under the
       policies as a result of the Claim.

   (e) Selection of Counsel.  If OSI is obligated under this Agreement to
       --------------------
       provide indemnification for, or make any Expense Advances with respect
       to, the Expenses of a Claim, if appropriate OSI may assume the defense of
       the Claim with counsel approved by Indemnitee (which approval will not be
       unreasonably withheld) on the delivery of notice to Indemnitee stating
       OSI's election to do so.  After delivery of the notice, approval of
       counsel by Indemnitee and retention of counsel by OSI, OSI will not be
       liable to Indemnitee for the fees or expenses of separate counsel
       thereafter retained by or on behalf of Indemnitee in connection with the
       same Claim; provided, however, that (1) Indemnitee may employ separate
       counsel in the Claim at Indemnitee's expense, and (2) if (A) Indemnitee's
       employment of separate counsel has been previously authorized by OSI, (B)
       Indemnitee has reasonably concluded that there may be a conflict of
       interest between Indemnitee and OSI in the conduct of the defense, or (C)
       OSI does not continue to retain such counsel to defend the Claim, then
       the fees and expenses of Indemnitee's separate counsel will be Expenses
       for which Indemnitee may receive indemnification or Expense Advances
       under this Agreement.

5. Additional Rights; Nonexclusivity.
   ---------------------------------

   (a) Scope.  OSI will indemnify the Indemnitee to the fullest extent permitted
       -----
       by law, notwithstanding that the indemnification is not specifically
       authorized by the other provisions of this Agreement, OSI's Certificate
       of Incorporation, OSI's Bylaws or by statute.  If any applicable law,
       statute or rule changes after the date of this Agreement,

                                 OSI Delaware Indemnification Agreement: Page 5

<PAGE>

       and the change expands the right of a Delaware corporation to indemnify a
       member of its board of directors or an officer, employee, agent or
       fiduciary, it is the intent of the parties that Indemnitee will enjoy by
       this Agreement the greater benefits afforded by the change. If any
       applicable law, statute or rule changes after the date of this Agreement,
       and the change narrows the right of a Delaware corporation to indemnify a
       member of its board of directors or an officer, employee, agent or
       fiduciary, the change, to the extent not otherwise required by the law,
       statute or rule to be applied to this Agreement, will have no effect on
       this Agreement or the parties' rights and obligations under it except as
       set forth in Section 10(a).

   (b) Nonexclusivity.  The indemnification and the payment of Expense Advances
       --------------
       provided by this Agreement (1) is in addition to any rights to which
       Indemnitee may be entitled under OSI's Certificate of Incorporation, its
       Bylaws, any other agreement, any vote of stockholders or disinterested
       directors, the General Corporation Law of the State of Delaware or
       otherwise, and (2) will continue as to Indemnitee for any action taken or
       not taken while serving in an indemnified capacity even though Indemnitee
       may later cease to serve in that capacity.

6. No Duplication of Payments.
   --------------------------

   OSI will not be liable under this Agreement to make any payments to the
   extent Indemnitee has otherwise actually received payment (under an insurance
   policy, provision of OSI's Certificate of Incorporation, Bylaws or otherwise)
   of the amounts otherwise payable.

7. Partial Indemnification.
   -----------------------

   If Indemnitee is entitled to indemnification by OSI under this Agreement for
   some or a portion of Expenses incurred in connection with a Claim, but not
   for the total amount of those Expenses, OSI will nevertheless indemnify
   Indemnitee for the portion of the Expenses to which Indemnitee is entitled.

8.  Mutual Acknowledgment.
    ---------------------

   In certain instances, Federal law or applicable public policy may prohibit
   OSI from indemnifying its directors, officers, employees, agents or
   fiduciaries, whether under this Agreement or otherwise.  OSI has undertaken,
   and may hereafter be required undertake, with the Securities and Exchange
   Commission to submit the question of the application of public policy to
   OSI's indemnification of its officers and directors to a court of competent
   jurisdiction.

9. Liability Insurance.
   -------------------

   To the extent OSI maintains liability insurance applicable to directors,
   officers, employees, agents or fiduciaries, Indemnitee will be covered by
   those policies in such a manner as to provide Indemnitee the same rights and
   benefits as are provided to the most favorably insured of OSI's directors, if
   Indemnitee is a director; or of OSI's officers, if Indemnitee is not a
   director of OSI but is an officer; or of OSI's key employees, agents or
   fiduciaries, if Indemnitee is not an officer or director but is a key
   employee, agent or fiduciary.

                                 OSI Delaware Indemnification Agreement: Page 6
<PAGE>

10.  Exceptions.
     ----------

     Notwithstanding any other provision of this Agreement, OSI will not be
     obligated under this Agreement:

     (a) Excluded Action or Omissions.  To indemnify or make Expense Advances to
         ----------------------------
         Indemnitee with respect to Claims arising out of acts, omissions or
         transactions for which Indemnitee is prohibited from receiving
         indemnification under applicable law.

     (b) Claims Initiated by Indemnitee.  To indemnify or make Expense Advances
         ------------------------------
         to Indemnitee with respect to Claims initiated or brought voluntarily
         by Indemnitee and not by way of defense, counterclaim or crossclaim,
         except (1) with respect to actions or proceedings brought to establish
         or enforce a right to indemnification under this Agreement, any other
         agreement or insurance policy or under OSI's Certificate of
         Incorporation or Bylaws now or hereafter in effect relating to Claims
         for Covered Events, (2) in specific cases if the Board of Directors has
         approved the initiation or bringing of the Claim, or (3) as otherwise
         required under Section 145 of the Delaware General Corporation Law,
         regardless of whether Indemnitee ultimately is determined to be
         entitled to the indemnification, Expense Advances or insurance
         recovery, as the case may be.

     (c) Lack of Good Faith.  To indemnify Indemnitee for any Expenses incurred
         ------------------
         by the Indemnitee with respect to any action instituted (1) by
         Indemnitee to enforce or interpret this Agreement, if a court having
         jurisdiction over the action determines as provided in Section 13 that
         each of the material assertions made by the Indemnitee as a basis for
         the action was not made in good faith or was frivolous, or (2) by or in
         the name of OSI to enforce or interpret this Agreement, if a court
         having jurisdiction over the action determines as provided in Section
         13 that each of the material defenses asserted by Indemnitee in the
         action was made in bad faith or was frivolous.

     (d) Claims Under Section 16(b).  To indemnify Indemnitee for Expenses and
         --------------------------
         the payment of profits arising from the purchase and sale by Indemnitee
         of securities in violation of Section 16(b) of the Securities Exchange
         Act of 1934, as amended, or any similar successor statute.

11.  Expenses in Actions Relating to Enforcement or Interpretation.
     -------------------------------------------------------------

     If any action is instituted by Indemnitee under this Agreement or under any
     liability insurance policies maintained by OSI to enforce or interpret any
     of the terms hereof or thereof, Indemnitee will be entitled to be
     indemnified for all Expenses incurred by Indemnitee with respect to the
     action (including without limitation attorneys' fees), regardless of
     whether Indemnitee is ultimately successful in the action, unless as a part
     of the action a court having jurisdiction over the action makes a final
     judicial determination (as to which all rights of appeal have been
     exhausted or lapsed) that each of the material assertions made by
     Indemnitee as a basis for the action was not made in good faith or was
     frivolous; provided, however, that until such final judicial determination
     is made, Indemnitee will be entitled under Section 3 to receive payment of
     Expense Advances hereunder with respect to the action. If an action is
     instituted by or in the name of OSI under this Agreement to enforce or
     interpret any of the terms of this Agreement, Indemnitee will be entitled
     to be indemnified for all Expenses incurred by Indemnitee in defense of the
     action (including without limitation costs and expenses incurred with
     respect to Indemnitee's counterclaims and cross-claims made in the action),
     unless as a part of the action a court having jurisdiction over the action
     makes a final judicial determination (as to which all rights of appeal
     therefrom have been exhausted or lapsed) that each of the material defenses
     asserted by Indemnitee in the action was made in bad faith or was
     frivolous; provided, however, that until

                                 OSI Delaware Indemnification Agreement: Page 7
<PAGE>

     such final judicial determination is made, Indemnitee will be entitled
     under Section 3 to receive payment of Expense Advances hereunder with
     respect to the action.

12.  Period of Limitations.
     ---------------------

     No legal action will be brought and no cause of action will be asserted by
     or in the right of OSI against Indemnitee, Indemnitee's estate, spouse,
     heirs, executors or personal or legal representatives after the expiration
     of two years from the date of accrual of the cause of action, and any claim
     or cause of action of OSI will be extinguished and deemed released unless
     asserted by the timely filing of a legal action within such two year
     period; provided, however, that if any shorter period of limitations is
     otherwise applicable to any such cause of action, the shorter period will
     govern.

13.  General.
     -------

     (a) Counterparts.  This Agreement may be executed in one or more
         ------------
         counterparts, each of which will constitute an original.

     (b) Binding Effect; Successors and Assigns.  This Agreement will be binding
         --------------------------------------
         upon and inure to the benefit of and be enforceable by the parties and
         their respective successors, assigns (including any direct or indirect
         successor by purchase, merger, consolidation or otherwise to all or
         substantially all of the business or assets of OSI), spouses, heirs and
         personal and legal representatives. OSI will require and cause any
         successor (whether direct or indirect, and whether by purchase, merger,
         consolidation or otherwise) to all, substantially all, or a substantial
         part, of the business or assets of OSI, by written agreement in form
         and substance satisfactory to Indemnitee, expressly to assume and agree
         to perform this Agreement in the same manner and to the same extent
         that OSI would be required to perform if no such succession had taken
         place. This Agreement will continue in effect regardless of whether
         Indemnitee continues to serve as a director, officer, employee, agent
         or fiduciary (as applicable) of OSI or of any other enterprise at OSI's
         request.

     (c) Notice.  All notices, requests, demands and other communications under
         ------
         this Agreement will be in writing and will be deemed duly given (1) if
         delivered by hand and signed for by the party addressed, on the date of
         delivery, or (2) if mailed by domestic certified or registered mail
         with postage prepaid, on the third business day after the date
         postmarked. Addresses for notice to either party are as shown on the
         signature page of this Agreement, or as subsequently modified by
         written notice.

     (d) Consent to Jurisdiction.  OSI and Indemnitee each hereby irrevocably
         -----------------------
         consent to the jurisdiction of the courts of the State of Delaware for
         all purposes in connection with any action or proceeding which arises
         out of or relates to this Agreement and agree that any action
         instituted under this Agreement will be commenced, prosecuted and
         continued only in the Court of Chancery of the State of Delaware in and
         for New Castle County, which will be the exclusive and only proper
         forum for adjudicating such a claim.

     (e) Severability.  The provisions of this Agreement will be severable if
         ------------
         any of provisions (including any provision within a single section,
         paragraph or sentence) is held by a court of competent jurisdiction to
         be invalid, void or otherwise unenforceable, and the remaining
         provisions will remain enforceable to the fullest extent permitted by
         law. Furthermore, to the fullest extent possible, the provisions of
         this Agreement (including without limitation each portion of this
         Agreement containing any provision held to be invalid, void or

                                 OSI Delaware Indemnification Agreement: Page 8
<PAGE>

         otherwise unenforceable, that is not itself invalid, void or
         unenforceable) will be construed so as to give effect to the intent
         manifested by the provision held invalid, illegal or unenforceable.

     (f) Choice of Law.  This Agreement, and all rights, remedies, liabilities,
         -------------
         powers and duties of the parties to this Agreement, will be governed by
         and construed in accordance with the laws of the State of Delaware as
         applied to contracts between Delaware residents entered into and to be
         performed entirely in the State of Delaware without regard to
         principles of conflicts of laws.

     (g) Subrogation.  In the event of payment under this Agreement, OSI will be
         -----------
         subrogated to the extent of the payment to all of the rights of
         recovery of Indemnitee, who will execute all documents required and
         will do all acts that may be necessary to secure those rights and to
         enable OSI effectively to bring suit to enforce those rights.

     (h) Amendment and Termination.  No amendment, modification, termination or
         -------------------------
         cancellation of this Agreement will be effective unless it is in
         writing signed by both the parties. No waiver of any of the provisions
         of this Agreement will be deemed to be or will constitute a waiver of
         any other provisions (whether or not similar), nor will any waiver
         constitute a continuing waiver.

     (i) Integration and Entire Agreement.  This Agreement sets forth the entire
         --------------------------------
         understanding between the parties and supersedes and merges all
         previous written and oral negotiations, commitments, understandings and
         agreements relating to its subject matter between the parties.

     (j) No Construction as Employment Agreement.  Nothing in this Agreement
         ---------------------------------------
         will be construed as giving Indemnitee any right to be retained in the
         employ of OSI or any of its subsidiaries or affiliated entities.

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

OBJECTIVE SYSTEMS INTEGRATORS, INC.    INDEMNITEE:

By: /s/ Philip N. Cardman              /s/ Bud J. Mullanix
   -------------------------------     -------------------------------------
                                       (signature)

Print Name: Philip N. Cardman          Print Name: Bud J. Mullanix
           -----------------------                --------------------------

Title: Vice President and General      Title: Vice President Human Resources
      ----------------------------           -------------------------------
       Counsel
      ----------------------------

Address:   101 Park Way                Address:
           Folsom, California  95630

                                 OSI Delaware Indemnification Agreement: Page 9

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