Document:

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                                                                    EXHIBIT 4.14

                              EMPLOYMENT AGREEMENT

         This EMPLOYMENT AGREEMENT (the "Agreement") is made as of this 14th day
of April 2005 (the "Effective Date"), by and among Peter M. Zotto (the
"Executive") and IONA Technologies, Inc., a Delaware corporation ("IONA, Inc."
or the "Company"), and its parent, IONA Technologies PLC, a public limited
company organized under the laws of Ireland ("IONA PLC").

         WHEREAS, the Company desires to continue to employ Executive upon the
terms and conditions set forth in this Agreement; and

         WHEREAS, the Executive desires to continue employment with the Company,
and to perform the duties assigned to him hereunder, upon the terms and
conditions set forth in this Agreement;

         NOW, THEREFORE, in consideration of the foregoing and the mutual
covenants and obligations herein contained, the parties hereto agree as follows:

         1. Position and Responsibilities. During the Term (as defined in
Section 4), the Executive shall be employed by the Company and shall serve as
IONA PLC's Chief Executive Officer. The Executive shall have the duties,
responsibilities and authority consistent with such positions as well as those
duties and responsibilities relating to the business and/or operations of the
Group (as defined below) as may reasonably be directed from time to time by IONA
PLC's Board of Directors (the "Board of Directors") or any committee thereof. In
the performance of the Executive's duties and responsibilities hereunder, the
Executive shall at all times report to, and be subject to the direction and
control of, the Board of Directors. The Executive agrees to devote all of his
business time and efforts to the performance of his duties hereunder and shall
not engage in any other business activity, whether or not for profit, that may
conflict with the Executive's duties under this Agreement or any other agreement
between Executive and the Company, IONA PLC or any of their respective
subsidiaries and affiliates (collectively, the "Group"), including, without
limitation, the Nondisclosure Agreement (as defined in Section 6).
Notwithstanding the foregoing, during the Term, the Executive may serve on the
boards of charitable organizations, serve on the boards of the companies on
which he serves as of the Effective Date, and engage in charitable activities
and community affairs; provided, that none of these activities, either alone or
in the aggregate, conflicts or interferes with his duties or responsibilities
hereunder. The Executive will fulfill his duties and responsibilities hereunder
from and at the Company's principal corporate office, currently located in
Waltham, Massachusetts, or from any such other location as may be requested by
the Board of Directors from time to time, and shall travel as necessary to
perform such duties and responsibilities. The Executive shall be appointed to
serve on the Board of Directors until the 2005 annual general meeting of the
shareholders of IONA PLC. The Board of Directors shall recommend, to the
shareholders of IONA PLC, the election of the Executive to the Board of
Directors at the 2005 annual general meeting of the shareholders of IONA PLC.
Subject, at all times from and after the 2005 annual general meeting of the
shareholders of IONA PLC, to election by the shareholders of IONA PLC, the
Executive shall serve on the Board of Directors during the Term. If the
Executive shall be elected or appointed to other offices of any member of the
Group during the Term, he shall serve in such positions without further
compensation other than that provided for in this Agreement.

         2. Compensation: Salary, Bonuses and Other Benefits. During the Term,
the Executive shall receive the following compensation and benefits from the
Company

         (A) Base Salary. The Company will pay to the Executive a semi-monthly
      salary of $13,333 (or $320,000 at an annualized rate) (the "Base Salary"),
      which shall be payable in conformity with the Company's customary
      practices for executive compensation, as such practices shall be
      established or modified from time to time. The Base Salary shall be
      subject to review at the end of each fiscal year and may be increased but
      not decreased. Any increase
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      shall be determined by the Board of Directors and/or its Compensation
      Committee, in its or their sole discretion, and shall take effect from the
      1st April each year.

         (B) Bonus. The Executive will be eligible to receive an annual
      performance bonus up to $224,000 based on achievement by the Group of
      performance objectives and by the Executive of individual performance
      objectives for each complete fiscal year during the Term, as established
      by the Board of Directors and/or its Compensation Committee, in its or
      their sole discretion (each, a "Bonus"). The determination of whether and
      to what extent individual and Group performance objectives have been
      achieved shall be made by the Board of Directors and/or its Compensation
      Committee in its or their sole discretion. If earned, a Bonus with respect
      to any particular fiscal year during the Term shall be paid within thirty
      days after release of the Company's unaudited financial statements for
      such fiscal year but in no event later than sixty (60) days after
      completion of the Company's fiscal year. The Executive shall be eligible
      to receive a Bonus for a particular fiscal year so long as he is employed
      by the Company on the last day of such fiscal year. If Executive's
      employment is terminated prior to the last day of the fiscal year, he
      shall not be eligible to receive a Bonus for that fiscal year unless his
      employment is terminated by the Company without Cause (as defined in
      Section 5(C) hereof).

         (C) Other Benefits. The Executive shall be eligible to participate in
      the Company's benefits programs to the same extent as, and subject to the
      same terms, conditions and limitations applicable to, other executives of
      the Company. The Company's benefit plans and policies, as may be amended,
      shall govern all such benefits. The Board of Directors and/or its
      Compensation Committee may cause the alteration, modification or deletion
      of, or addition to, employee benefits plans at any time as the Board of
      Directors and/or its Compensation Committee, in its or their sole
      judgment, determines to be appropriate. If the Executive elects not to
      participate in the Company's health, dental and life insurance programs,
      the Company will pay the total gross sum of $4,000.00, as ordinary income,
      at the anniversary dates of the Executive's employment by the Company,
      subject to the adjustment for partial years of employment in which the
      Executive did not participate in such programs.

         (D) Vacation. The Executive shall be eligible to earn and use paid
      vacation in accordance with the Company's benefits programs to the same
      extent as, and subject to the same terms, conditions and limitations
      applicable to, other executives of the Company. Paid vacation shall accrue
      on a monthly basis in accordance with the Company's vacation policy and
      shall be subject to the Company's prevailing policy regarding carry-over
      of unused vacation time.

         (E) Reimbursement of Business Expenses. The Company shall pay or
      reimburse the Executive for all reasonable business expenses incurred or
      paid by the Executive in the performance of his responsibilities
      hereunder. The Executive must provide reasonable substantiation and
      documentation of these expenses to the Company in order to receive
      reimbursement and otherwise comply with the Company's prevailing policy
      relating to expense reimbursement, as such policy may be modified from
      time to time.

         (F) Indemnification. Executive will be eligible for indemnification to
      the full extent authorized under IONA PLC's Articles of Association and,
      to the extent applicable, the Company's Certificate of Incorporation and
      By-laws and will be eligible for coverage under any applicable Directors'
      & Officers' liability insurance policy, subject to the terms and
      conditions contained therein.

         (G) Tax Withholding. All payments in this Agreement shall be subject to
      all applicable foreign, federal, state and local withholding, payroll and
      other taxes, and the Company may withhold from any amounts payable
      hereunder in order to comply with such obligations.

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         3. Stock Options. The Executive shall be eligible to receive stock
option grants from time to time as may be authorized by the Compensation
Committee of the Board of Directors, in its sole discretion.

         4. Term. The period of the Executive's employment under this Agreement
is the "Term." The Term consists of the Initial Term, as defined below, and any
extensions, as described below. Subject to the earlier termination as hereafter
provided in Section 5, the Term shall commence on the Effective Date and shall
continue until the date that is three (3) years from the Effective Date (the
"Initial Term"). The Term shall automatically be extended for successive
additional one-year terms unless either the Company or the Executive notifies
the other party in writing at least six (6) months before the end of the Initial
Term or three (3) months before the end of any extension of the Term of an
intention not to allow the Term to be so extended. Notification by the Company
to the Executive of the Company's intention not to allow the Term to be extended
as set forth above shall be treated as equivalent for all purposes to a
Termination By The Company For Reasons Other Than Cause as defined by Section
5(C) hereof. Notification by the Executive to the Company of the Executive's
intention not to allow the Term to be extended as set forth above shall be
treated as equivalent for all purposes to a Termination By The Executive as
defined in Section 5(A) hereof.

         5. Termination. The Executive's employment under this Agreement may be
terminated at any time subject to certain notice and severance obligations as
provided in this Section. The effective date of such termination is referred to
in this Agreement as the "Termination Date."

         (A) Termination By The Executive. The Executive may terminate his
       employment under this Agreement at any time by giving at least three (3)
       months advance written notice to the Company; provided, that if the
       Executive seeks to terminate employment during the Initial Term, he shall
       give at least six (6) months' advance written notice to the Company. In
       the event of a termination at the Executive's option pursuant to this
       Section 5(A), the Company may, in its sole discretion and upon receipt of
       written notice from Executive, elect to waive all or any portion of the
       notice period and accelerate the Termination Date without obligation to
       pay Executive his Base Salary and benefits during the remainder of the
       notice period but without otherwise affecting the Executive's rights as
       set forth herein. In the event of termination at the Executive's option,
       the Executive shall be entitled to no payments, salary continuation,
       severance or other benefits, except for (i) payment of Base Salary to the
       extent accrued but unpaid through the Termination Date; (ii) payment of
       accrued but unused vacation up to the Termination Date; and (iii) payment
       of any earned but unpaid Bonus up to the end of the most recently
       completed fiscal year ending before the Termination Date (collectively,
       the "Accrued Obligations"), and the Executive shall resign, as of the
       Termination Date, from the offices he then holds pursuant to Section 1.

         (B) Termination By The Company For Cause. The Company may, immediately
       and unilaterally, terminate the Executive's employment under this
       Agreement for "Cause" at any time, and the Executive shall resign, as of
       the Termination Date, from the offices he then holds pursuant to Section
       1. A termination of Executive's employment by the Company shall
       constitute a termination for "Cause" under this Section 5(B) if such
       termination is for one or more of the following reasons: (i) Executive's
       willful failure or refusal (except due to Disability (as hereinafter
       defined)) to perform substantially his duties on behalf of the Company,
       IONA PLC or any other member of the Group for a period of thirty (30)
       days after receiving written notice identifying in reasonable detail the
       nature of such failure or refusal; (ii) Executive's conviction of, or
       entry of a plea of guilty or nolo contendere to, a felony; (iii) willful
       misconduct or breach of fiduciary duty by Executive which causes material
       harm to the Company, IONA PLC or any other member of the Group; or (iv)
       Executive's willful violation of the Nondisclosure Agreement (as defined
       in Section 6), any other written agreement between the Executive and the
       Company, IONA PLC or any other member of the Group, or any written policy
       of the Company, IONA PLC or any other member of the Group, which
       violation causes material harm to the Company, IONA PLC or any other
       member of the Group.

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       Notwithstanding the foregoing, Executive shall not be deemed to have been
       terminated for Cause unless and until there shall have been delivered to
       him a copy of a resolution duly adopted by the Board of Directors
       (excluding Executive if he is then a Director) at a meeting of the Board
       of Directors called and held for (but not necessarily exclusively for)
       that purpose (after reasonable notice to Executive and an opportunity for
       Executive, together with counsel of his choice, to be heard by the Board
       of Directors) finding that Executive has, in the good faith opinion of
       the Board of Directors, engaged in conduct constituting Cause and
       specifying the particulars thereof in reasonable detail.

                  In the event of a termination of Executive employment by the
      Company for Cause pursuant to this Section 5(B), the Executive shall be
      entitled to no payments, salary continuation, severance or other benefits,
      except for the payment of the Accrued Obligations.

                  (C) Termination By The Company For Reasons Other Than Cause.
      The Company may unilaterally terminate the Executive's employment under
      this Agreement at any time without Cause by giving one (1) month's advance
      written notice to the Executive. During such one-month period, the
      Executive shall be available on a full-time basis for the benefit of the
      Company to, among other things, assist the Company in transitioning any
      matters. The Company, at its option and in its discretion, may elect to
      pay the Executive his prorated Base Salary rate for all or any portion of
      one (1) month in lieu of such notice and the Executive shall resign, as of
      the Termination Date, from the offices he then holds pursuant to Section
      1.

                  In the event the Company terminates the Executive's employment
      under this Section 5(C), the Executive shall be entitled to payment of the
      Accrued Obligations, and the following payments and benefits; provided,
      that the Executive's entitlement to the following shall be subject to his
      timely execution (and the non-revocation) of a comprehensive release of
      claims in a form, and of a scope, acceptable to the Company:

                  (i) Payment, in a lump sum, of an amount equal to the sum of
      (A) 18 months of the Base Salary in effect as of the Termination Date and
      (B) one hundred and fifty percent (150%) of the Bonus payable to the
      Executive pursuant to Section 2(B) of this Agreement;

                  (ii) In the event the Executive elects after the Termination
      Date to continue health, vision and/or dental coverage pursuant to the
      Consolidated Omnibus Budget Reconciliation Act of 1985 ("COBRA"), the
      Company will pay the Executive's monthly premium payments for each such
      coverage elected by the Executive for the Executive and his eligible
      dependents, if applicable, until the earliest of the following dates to
      occur with respect to each such elected coverage: (A) the date that is 18
      months after the Termination Date; (B) the date upon which the Executive
      becomes covered under a comparable group plan for such applicable
      coverage; or (C) the date upon which the Executive ceases to be eligible
      for COBRA continuation for such applicable coverage (the "COBRA
      Ineligibility Date"); provided, that, if the COBRA Ineligibility Date
      occurs first, the Company shall pay the Executive a lump sum at the rate
      of $4,000 per year, subject to pro rata adjustment, for the length of the
      period from the COBRA Ineligibility Date to the date that is 18 months
      after the Termination Date; and

                  (iii) Any and all unvested stock, stock options, awards and
      rights that were granted to the Executive under any stock plans prior to
      the Termination Date shall immediately become vested and exercisable as of
      the Termination Date to the extent that they would have become vested and
      exercisable if the Executive's employment had continued to the date that
      is 18 months after the Termination Date. Notwithstanding any contrary
      provision of any agreement relating to then outstanding stock, stock
      options, awards and rights granted to the Executive under any stock plans,
      all such stock, stock options, awards and rights that become vested and
      exercisable pursuant to the previous sentence may be exercised by the
      Executive (or the Executive's heirs, estate, legatees, executors,
      administrators, and legal representative) at any time during the period
      ending on the earlier of (A) the later of (i) three (3) months after the

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      Termination Date and (ii) if the Executive dies within the three-month
      period after the Termination Date, the first anniversary of date of the
      Executive's death, and (B) the scheduled expiration of such stock, stock
      option, award or right, as the case may be.

                  The parties hereto expressly agree that the Executive shall
      not be required to mitigate the amount of any payments provided for in
      this Agreement by seeking other employment or otherwise, nor shall any
      profits, income, earnings or other benefits from any source whatsoever
      create any mitigation, offset, reduction or any other obligation on the
      part of the Executive hereunder or otherwise.

                  (D) Termination Due To Death Or Disability. The Executive's
      employment hereunder will terminate immediately upon the Executive's death
      or Disability and the Executive shall resign (or be deemed to have
      resigned, as the case may be), as of the Termination Date, from the
      offices he then holds pursuant to Section 1. In such event, the Executive
      or his estate shall be entitled to no payments, salary continuation,
      severance or other benefits, except for payment of the Accrued
      Obligations. For the purposes of this Agreement, "Disability" shall mean
      any physical incapacity or mental incompetence (i) as a result of which
      the Executive is unable to substantially perform his essential duties and
      responsibilities hereunder for an aggregate of 90 days, whether or not
      consecutive, during any calendar year, and (ii) which cannot be reasonably
      accommodated without undue hardship.

                  (E) Resignation For Good Reason. A Resignation For Good Reason
      shall occur on the 31st day after receipt by the Company and IONA PLC of
      the Executive's notice pursuant to subsection (ii) of this Section 5(E),
      if the conditions set forth in subsections (i), (ii) and (iii) of this
      Section 5(E) occur.

                  (i)      Any of the following "Events" occurs without the
      Executive's prior written consent

                           (A)      Reduction of the Executive's Base Salary or
                                    Bonus eligibility; or

                           (B)      Substantial reduction in the scope or nature
                                    of the Executive's responsibilities, duties,
                                    authorities, positions, powers or reporting
                                    structure or relationships, except due to
                                    the Executive's Disability or Cause;
                                    provided, further, that the Company may
                                    suspend the Executive with full pay (1) due
                                    to physical incapacity or mental
                                    incompetence before an aggregate of 90 days
                                    is reached or (2) during the period of an
                                    investigation concerning whether Cause
                                    exists; or

                           (C)      Relocation of the Executive's primary
                                    workplace to a location more than thirty-
                                    five (35) miles away from Waltham,
                                    Massachusetts; or

                           (D)      The Board of Directors shall have failed to
                                    recommend, to the shareholders of IONA PLC,
                                    the election of the Executive to the Board
                                    of Directors at (i) the 2005 annual general
                                    meeting of the shareholders of IONA PLC and
                                    (ii) each other general meeting of the
                                    shareholders of IONA PLC during the Term at
                                    which the class of directors to which the
                                    Executive shall have been assigned stands
                                    for election; and

                  (ii)     Within sixty (60) days after any such Event, the
      Executive provides written notice to the Company and IONA PLC describing
      with reasonable specificity the Event and stating his intention to resign
      from employment due to such Event; and

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                  (iii)    The Company and/or IONA PLC do not cure or cause to
      be cured such Event within thirty (30) days after receipt of Executive's
      notice.

                  A Resignation For Good Reason shall be treated for all
      purposes as equivalent to a Termination By The Company For Reasons Other
      Than Cause as defined in Section 5(C) hereof, and not a Termination By The
      Executive as defined in Section 5(A) hereof, and the Executive shall
      resign, as of the Termination Date, from the offices he then holds
      pursuant to Section 1.

                  (F) Public Statements. Upon termination of the Executive's
     employment for any reason, the Board of Directors or the General Counsel of
     IONA PLC will direct and control the issuance and content of any
     announcement, release or other statement to any employees, commercial
     partners, insurers, directors, shareholders and clients of the Company,
     IONA PLC or any member of the Group, and the press after consultation with
     Executive, as appropriate under the circumstances.

                  (G) Change of Control Agreement. In the event that the
     Executive shall be entitled to payments and benefits as set forth in
     Section 5.a. of that certain Change in Control Agreement between Executive
     and the Company dated October 14, 2003 (the "Change in Control Agreement"),
     the Executive shall be entitled to no payments, salary continuation,
     severance or other benefits under this Agreement, except for payment of
     Accrued Obligations.

         6. Agreement Regarding Confidentiality, Proprietary Developments and
Noncompetition. Executive acknowledges that on October 18, 2003, he executed
that certain Agreement Regarding Confidentiality, Proprietary Developments and
Noncompetition (the "Nondisclosure Agreement"). Executive acknowledges that he
will continue to be subject to, and will continue to abide by, the terms and
obligations contained in the Nondisclosure Agreement (other than the last two
sentences of Section 1 thereof, which are amended by this Agreement and no
longer applicable) both during the Term and thereafter in accordance with the
terms contained therein, and regardless of (i) the reason for the termination of
his employment and (ii) any change in the terms or conditions of his employment,
if any, prior to such termination.

         7. Consent and Waiver by Third Parties. The Executive hereby represents
and warrants that he has obtained all waivers and/or consents from third parties
which are necessary to enable him to enjoy employment with the Company on the
terms and conditions set forth herein and to execute and perform this Agreement
without being in conflict with any other agreement, obligation or understanding
with any such third party. The Executive represents that he is not bound by any
agreement or any other existing or previous business relationship, which
conflicts with, or may conflict with, the performance of his obligations
hereunder or prevent the full performance of his duties and obligations
hereunder. The Executive represents that he shall not use or disclose any
confidential or trade secret information of a former employer in the course of
performing his duties hereunder.

         8. Governing Law. This Agreement, the employment relationship
contemplated herein and any claim arising from such relationship, whether or not
arising under this Agreement, shall be governed by and construed in accordance
with the internal laws of Massachusetts, without giving effect to the principles
of choice of law or conflicts of laws of Massachusetts. Any claims or legal
actions by one party against the other arising out of the relationship between
the parties contemplated herein (whether or not arising under this Agreement)
shall be commenced or maintained in any state or federal court located in
Massachusetts, and the Executive hereby submits to the jurisdiction and venue of
any such court.

         9. Severability/Reformation. In case any one or more of the provisions
contained in this Agreement or the other agreements executed in connection with
the transactions contemplated hereby for any reason shall be held to be invalid,
illegal or unenforceable in any respect, such invalidity, illegality or
unenforceability shall not affect any other provision of this Agreement or such
other

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agreements, but this Agreement or such other agreements, as the case may be,
shall be construed, reformed and enforced to the maximum extent permitted by
law.

         10. Waivers and Modifications. This Agreement only may be modified, and
the rights, remedies and obligations contained in any provision hereof may be
waived, in accordance with this Section 10. No waiver by one party to this
Agreement of any breach by the other party hereto of any provision hereof shall
be deemed to be a waiver of any later or other breach thereof or as a waiver of
any other provision of this Agreement. This Agreement and its terms may not be
waived, changed, discharged or terminated orally or by any course of dealing
between the parties, but only by an instrument in writing signed by the party
against whom any waiver, change, discharge or termination is sought. No
modification or waiver by the Company shall be effective without the consent of
the Board of Directors at the time of such modification or waiver.

         11. Assignment. The Executive acknowledges that the services to be
rendered by him hereunder are unique and personal in nature. Accordingly, the
Executive may not assign any of his rights or delegate any of his duties or
obligations under this Agreement except, in the event of his death, to his
estate. The rights and obligations of the Company under this Agreement may be
assigned by the Company, shall inure to the benefit of, and shall be binding
upon, the successors and assigns of the Company.

         12. Entire Agreement. This Agreement, together with the agreements
referenced herein, constitutes the entire understanding of the parties and
supersedes and cancels all agreements, representations, offers and
understandings, whether written or oral, express or implied, made prior to the
Effective Date between the Executive and the Company (including but not limited
to the offer letter dated October 14, 2003 from the Company to the Executive),
except for (i) any stock option agreements entered into by and between the
Executive and IONA PLC prior to the Effective Date (ii) the Nondisclosure
Agreement, and (iii) the Change in Control Agreement, all of which shall remain
in full force and effect in accordance with their respective terms.

         13. Notices. All notices hereunder shall be in writing and shall be
delivered in person, sent via facsimile, or mailed by certified or registered
mail, return receipt requested, addressed as follows:

             If to the Company, to:       Attention:  General Counsel
                                          IONA Technologies, Inc.
                                          200 West Street, 4th Floor
                                          Waltham, MA 02451

             with a copy to:
                                          Mark T. Bettencourt, Esq.
                                          Goodwin Procter LLP
                                          Exchange Place
                                          Boston, MA 02109

             If to Executive, at his address set forth below his signature
hereto.

Notices shall be deemed to be given when delivered in person or confirmed by
facsimile receipt, or three days after deposit in the mail as set forth above.

         14. Counterparts. This Agreement may be executed in two or more
counterparts and/or via facsimile, each of which shall be deemed to be an
original, but all of which together shall constitute one and the same
instrument.

         15. Section Headings. The descriptive section headings herein have been
inserted for convenience only and shall not be deemed to define, limit, or
otherwise affect the construction of any

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provision hereof. The language of this Agreement shall not be construed for or
against either party hereto, but instead shall be construed as whole according
to its fair meaning.

         16. Survival. This Agreement shall terminate upon the termination of
the Executive's employment with the Company for any reason; provided, however,
that the provisions of Sections 2(F), and 5 through 16 hereof (and any other
operative provisions of this Agreement which, by logical context, are necessary
to interpret and enforce this Agreement so as to give effect to the parties'
intent), all shall survive the termination of this Agreement and the Executive's
employment with the Company hereunder until all obligations pursuant to such
Sections and provisions have been fulfilled. Moreover, (i) any stock option
agreements entered into by and between the Executive and IONA PLC prior to the
Termination Date; (ii) the Nondisclosure Agreement; and (iii) the Change in
Control Agreement, all shall remain in full force and effect in accordance with
their respective terms.

         IN WITNESS WHEREOF, the parties hereto have executed this Employment
Agreement as of the date first above written as an instrument under seal.

IONA TECHNOLOGIES, INC.

By: /s/ Daniel Demmer                       /s/ Peter M. Zotto
    -------------------------               ----------------------------------
                                            PETER M. ZOTTO

Title: CFO
       ----------------------
                                            649 Wellesley St.
                                            ----------------------------------
                                            Street Address

                                            Weston,         MA           02493
                                            ----------------------------------
                                            City          State       Zip Code

IONA TECHNOLOGIES PLC

By: /s/ Daniel Demmer
    -------------------------
Title: CFO
       ----------------------<PAGE>

                                                                     EXHIBIT 4.2

                             SIOUXLAND ETHANOL, LLC

                             SUBSCRIPTION AGREEMENT

                   Limited Liability Company Membership Units

                                $10,000 PER UNIT

                     MINIMUM INVESTMENT OF 2 UNITS ($20,000)
                     1 UNIT INCREMENTS THEREAFTER ($10,000)

The undersigned subscriber, desiring to become a member of Siouxland Ethanol,
LLC ("Siouxland"), a Nebraska limited liability company, with its principal
place of business at 110 East Elk Street, Jackson, Nebraska 68743, hereby
subscribes for the purchase of the membership interests of Siouxland, and agrees
to pay the related purchase price, identified below.

A. SUBSCRIBER INFORMATION. Please print your individual or entity name and
address. Joint subscribers should provide their respective names. Your name and
address will be recorded exactly as printed below.

   1. Subscriber's Printed Name ________________________________________________

   2. Title, if applicable: ____________________________________________________

   3. Subscriber's Address:
        Street _________________________________________________________________
        City, State, Zip Code __________________________________________________

   4. Email Address: ___________________________________________________________

B. NUMBER OF UNITS PURCHASED. You must purchase at least 2 units. Your ownership
interest may not exceed 40% of all our outstanding membership units. We
presently have 195 units outstanding. Accordingly, assuming that we sell the
minimum number of 1,900 units in this offering, you may not purchase more than
838 units. The maximum number of units to be sold is 4,600.

                              [         ]

C. PURCHASE PRICE. Indicate the dollar amount of your investment (minimum
investment is $20,000).

 1. Total Purchase Price    =   2. 1st Installment     +   3. 2nd Installment
    --------------------           ---------------            ---------------
   ($10,000 Per Unit               (10% of the Total          (90% of the Total
multiplied by the number           Purchase Price)            Purchase Price)
    in box B above.)

          [  ]              =          [  ]            +          [  ]

D. GENERAL INSTRUCTIONS FOR SUBSCRIBERS:

You should read the Prospectus dated Date of Effectiveness (the "Prospectus")
in its entirety including exhibits for a complete explanation of an investment
in Siouxland Ethanol, LLC. To subscribe, you must:

INSTRUCTIONS IF YOU ARE SUBSCRIBING PRIOR TO THE COMPANY'S RELEASE OF FUNDS FROM
ESCROW: If you are subscribing prior to the Company's release of funds from
escrow, you must follow Steps 1 through 5 below:

      1. Complete all information required in this Subscription Agreement, and
date and sign the Subscription Agreement on page 6 and the Member Signature Page
to our Operating Agreement attached to this Subscription Agreement as Exhibit A.

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<PAGE>

      2. Immediately provide your personal (or business) check for the first
installment of ten percent (10%) of your investment amount made payable to U.S.
Bank, escrow agent for Siouxland Ethanol LLC. You will determine this amount in
box C.2 on page 1 of this Subscription Agreement.

      3. Execute the Promissory Note and Security Agreement on page 7 of this
Subscription Agreement evidencing your commitment to pay the remaining ninety
percent (90%) due for the Units that is attached to this Subscription Agreement
and grant Siouxland Ethanol, LLC a security interest in your Units.

      4. Deliver each of the original executed documents referenced in Items 1
and 3 of these Instructions, together with your personal or business check
described in Item 2 of these Instructions to the following:

                  Siouxland Ethanol, LLC
                  110 E. Elk Street
                  Jackson NE 68743

      5. Upon written notice from Siouxland Ethanol, LLC stating that its sales
of Units have exceeded the Minimum Offering amount of $19,000,000, you must,
within twenty (20) days secure an additional personal (or business) check for
the second installment of ninety percent (90%) of your investment amount made
payable to U.S. Bank, NA escrow agent for Siouxland Ethanol, LLC in satisfaction
of the Promissory Note and Security Agreement. You will determine this amount in
box C.3 on page 1 of this Subscription Agreement. You must deliver this check to
the same address set forth above in Instruction 4 within twenty (20) days of the
date of Siouxland's written notice. If you fail to pay the second installment
pursuant to the Promissory Note and Security Agreement, Siouxland shall be
entitled to retain your first installment and to seek other damages, as provided
in the Promissory Note and Security Agreement.

      Your funds will be placed in Siouxland's escrow account at U.S. Bank, NA.
The funds will be released to Siouxland or returned to you in accordance with
the escrow arrangements described in the Prospectus. Siouxland may, in its sole
discretion, reject or accept any part or all of your subscription. If Siouxland
rejects your subscription, your Subscription Agreement and investment will be
promptly returned to you, plus nominal interest, minus escrow fees. Siouxland
may not consider the acceptance or rejection of your subscription until a future
date near the end of this offering.

INSTRUCTIONS IF YOU ARE SUBSCRIBING AFTER THE COMPANY'S RELEASE OF FUNDS FROM
ESCROW: If you are subscribing after the Company's release of funds from escrow,
you must follow Steps 1 through 3 below:

      1. Complete all information required in this Subscription Agreement, and
date and sign the Subscription Agreement on page 6 and the Member Signature Page
to our Operating Agreement attached to this Subscription Agreement as Exhibit A.

      2. Immediately provide your personal (or business) check for the entire
amount of your investment (as determined in Box C.1 on page 1) made payable to
"SIOUXLAND ETHANOL, LLC."

      3. Deliver the original executed documents referenced in Item 1 of these
Instructions, together with your personal or business check described in Item 2
of these Instructions to the following:

                  Siouxland Ethanol, LLC
                  110 East Elk Street
                  Jackson NE 68743

      If you are subscribing after we have released funds from escrow and we
accept your investment, your funds will be immediately at-risk as described in
the Prospectus. Siouxland may, in its sole discretion, reject or accept any part
or all of your subscription. If Siouxland rejects your subscription, your
Subscription Agreement and investment will be returned to you promptly, plus
nominal interest, minus escrow fees. Siouxland may not consider the acceptance
or rejection of your subscription until a future date near the end of this
offering.

                                       2
<PAGE>

YOU MAY DIRECT YOUR QUESTIONS TO ONE OF OUR DIRECTORS LISTED BELOW OR TO
SIOUXLAND AT 402-632-2676.

<TABLE>
<CAPTION>
  Director        Cell Number   Home Number
  --------        -----------   -----------
<S>               <C>           <C>
Tom Lynch         712-251-3719  402-632-4995
Pam Miller        712-251-0302  402-698-2122
Ronald Wetherell  712-436-2266  712-436-2488
Shennen Saltzman  712-203-1581  402-494-7592
</TABLE>

E. ADDITIONAL SUBSCRIBER INFORMATION. The subscriber, named above, certifies the
following under penalties of perjury:

      1.    FORM OF OWNERSHIP. Check the appropriate box (one only) to indicate
            form of ownership. If the subscriber is a Custodian, Corporation,
            Partnership or Trust, please provide the additional information
            requested.

            [ ]   Individual

            [ ]   Joint Tenants with Right of Survivorship (Both signatures
                  must appear on Page 6.)

            [ ]   Corporation, Limited Liability Company or Partnership
                  (Corporate Resolutions, Operating Agreement or Partnership
                  Agreement must be enclosed.)

            [ ]   Trust
                       Trustee's Name: _________________________________________
                       Trust Date: _____________________________________________

            [  ]  Other: Provide detailed information in the space immediately
                  below.
                  ______________________________________________________________
                  ______________________________________________________________
                  ______________________________________________________________

      2.    SUBSCRIBER'S TAXPAYER INFORMATION. Check the appropriate box if you
            are a non-resident alien, a U.S. Citizen residing outside the United
            States or subject to backup withholding. Trusts should provide their
            taxpayer identification number. Custodians should provide the
            minor's Social Security Number. All individual subscribers should
            provide their Social Security Number. Other entities should provide
            their taxpayer identification number.

            [ ]   Check box if you are a non-resident alien

            [ ]   Check box if you are a U.S. citizen residing outside of the
                  United States

            [ ]   Check this box if you are subject to backup withholding

            Subscriber's Social Security No. ___________________________________
            Joint Subscriber's Social Security No. _____________________________
            Taxpayer Identification No. ________________________________________

      3.    MEMBER REPORT ADDRESS. If you would like duplicate copies of member
            reports sent to an address that is different than the address
            identified in section A, please complete this section.

            Address: ___________________________________________
                     ___________________________________________

      4.    STATE OF RESIDENCE.

            State of Principal Residence: ______________________________________
            State where driver's license is issued: ____________________________
            State where resident income taxes are filed: _______________________

            State(s) in which you have maintained your principal residence
            during the past three years:

            a [               ]        b. [           ]        c. [            ]

                                       3

<PAGE>

      5.    SUITABILITY STANDARDS. You cannot invest in Siouxland unless you
            meet one of the following suitability tests (a or b) set forth
            below. Please review the suitability tests and check the box next to
            the following suitability test that you meet. For husbands and wives
            purchasing jointly, the tests below will be applied on a joint
            basis.

            a. [ ]  I (We) have annual income from whatever source of at least
                    $45,000 and a net worth of at least $45,000, exclusive of
                    home, furnishings and automobiles; or

            b. [ ]  I (We) have a net worth of at least $100,000, exclusive of
                    home, furnishings and automobiles.

      6.    SUBSCRIBER'S REPRESENTATIONS AND WARRANTIES. You must read and
            certify your representations and warranties and sign and date this
            Subscription Agreement.

            By signing below the subscriber represents and warrants to Siouxland
            that he, she or it:

            a.    has received a copy of Siouxland's Prospectus dated date of
                  effectiveness and the exhibits thereto;

            b.    has been informed that the Units of Siouxland are offered and
                  sold in reliance upon a federal securities registration;
                  Nebraska, South Dakota, and Iowa securities registrations; and
                  exemptions from securities registrations in various other
                  states, and understands that the Units to be issued pursuant
                  to this subscription agreement can only be sold to a person
                  meeting requirements of suitability;

            c.    has been informed that the securities purchased pursuant to
                  this Subscription Agreement have not been registered under the
                  securities laws of any state other than the States of
                  Nebraska, South Dakota and Iowa, and that Siouxland is relying
                  in part upon the representations of the undersigned Subscriber
                  contained herein;

            d.    has been informed that the securities subscribed for have not
                  been approved or disapproved by the Nebraska, South Dakota or
                  Iowa Securities Departments or any other regulatory authority,
                  nor has any regulatory authority passed upon the accuracy or
                  adequacy of the Prospectus;

            e.    intends to acquire the Units for his/her/its own account
                  without a view to public distribution or resale and that
                  he/she/it has no contract, undertaking, agreement or
                  arrangement to sell or otherwise transfer or dispose of any
                  Units or any portion thereof to any other person;

            f.    understands that there is no present market for Siouxland's
                  membership units, that the membership units will not trade on
                  an exchange or automatic quotation system, that no such market
                  is expected to develop in the future and that there are
                  significant restrictions on the transferability of the
                  membership units;

            g.    has been encouraged to rely upon the advice of his legal
                  counsel and accountants or other financial advisers with
                  respect to the tax and other considerations relating to the
                  purchase of units;

            h.    has received a copy of the Siouxland Amended and Restated
                  Operating Agreement, dated February 24, 2005, and understands
                  that upon closing the escrow by Siouxland, the subscriber and
                  the membership units will be bound by the provisions of the
                  Amended and Restated Operating Agreement which contains, among
                  other things, provisions that restrict the transfer of
                  membership units;

            i.    understands that the Units are subject to substantial
                  restrictions on transfer under state securities laws along
                  with restrictions in the Siouxland Amended and Restated
                  Operating Agreement and agrees that if the membership units or
                  any part thereof are sold or distributed in the future, the
                  subscriber shall sell or distribute them pursuant to the terms
                  of the Amended and Restated Operating Agreement, and the
                  requirements of the Securities Act of 1933, as amended, and
                  applicable state securities laws;

            j.    meets the suitability test marked in Item 5 above and is
                  capable of bearing the economic risk of this investment,
                  including the possible total loss of the investment;

            k.    understands that Siouxland will place a restrictive legend on
                  any certificate representing any unit containing substantially
                  the following language as the same may be amended by the
                  Directors of Siouxland in their sole discretion:

                                       4
<PAGE>

                        THE TRANSFERABILITY OF THE UNITS REPRESENTED BY THIS
                        CERTIFICATE IS RESTRICTED. SUCH UNITS MAY NOT BE SOLD,
                        ASSIGNED, OR TRANSFERRED, NOR WILL ANY ASSIGNEE, VENDEE,
                        TRANSFEREE, OR ENDORSEE THEREOF BE RECOGNIZED AS HAVING
                        ACQUIRED ANY SUCH UNITS FOR ANY PURPOSES, UNLESS AND TO
                        THE EXTENT SUCH SALE, TRANSFER, HYPOTHECATION, OR
                        ASSIGNMENT IS PERMITTED BY, AND IS COMPLETED IN STRICT
                        ACCORDANCE WITH, APPLICABLE STATE AND FEDERAL LAW AND
                        THE TERMS AND CONDITIONS SET FORTH IN THE AMENDED AND
                        RESTATED OPERATING AGREEMENT AS AGREED TO BY EACH
                        MEMBER.

                        THE SECURITIES REPRESENTED BY THIS CERTIFICATE MAY NOT
                        BE SOLD, OFFERED FOR SALE, OR TRANSFERRED IN THE ABSENCE
                        OF EITHER AN EFFECTIVE REGISTRATION UNDER THE SECURITIES
                        ACT OF 1933, AS AMENDED, AND UNDER APPLICABLE STATE
                        SECURITIES LAWS, OR AN OPINION OF COUNSEL SATISFACTORY
                        TO THE COMPANY THAT SUCH TRANSACTION IS EXEMPT FROM
                        REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS
                        AMENDED, AND UNDER APPLICABLE STATE SECURITIES LAWS.

            l.    understands that, to enforce the above legend, Siouxland may
                  place a stop transfer order with its registrar and stock
                  transfer agent (if any) covering all certificates representing
                  any of the membership units;

            m.    has knowledge and experience in business and financial matters
                  as to be able to evaluate the merits and risks of an
                  investment in the Units, believes that the investment in Units
                  is suitable for the subscriber and can bear the economic risk
                  of the purchase of Units including the total loss of the
                  undersigned's investment;

            n.    may not transfer or assign this subscription agreement, or any
                  of the subscriber's interest herein;

            o.    has written his, her, or its correct taxpayer identification
                  number under Item 3 on this subscription agreement;

            p.    is not subject to back up withholding either because he, she
                  or it has not been notified by the Internal Revenue Service
                  ("IRS") that he, she or it is subject to backup withholding as
                  a result of a failure to report all interest or dividends, or
                  the IRS has notified him, her or it that he is no longer
                  subject to backup withholding (Note this clause (p) should be
                  crossed out if the backup withholding box in Item 2 is
                  checked);

            q.    understands that execution of the attached Promissory Note and
                  Security Agreement will allow Siouxland or its assigns to
                  pursue the obligor for payment of the amount due thereon by
                  any legal means, including, but not limited to, acquisition of
                  a judgment against the obligor in the event that the
                  subscriber defaults on that Promissory Note and Security
                  Agreement; and

            r.    Acknowledges that Siouxland may retain possession of
                  certificates representing subscriber's Units to perfect its
                  security interest in those Units.

SIGNATURE OF SUBSCRIBER/ JOINT SUBSCRIBER:

DATE: _______________________________________

INDIVIDUALS:                                    ENTITIES:

_____________________________________________   ________________________________
Name of Individual Subscriber (Please Print)    Name of Entity (Please Print)

_____________________________________________   ________________________________
Signature of Individual                         Print Name and Title of Officer

                                       5
<PAGE>

__________________________________________________    __________________________
Name of Joint Individual Subscriber (Please Print)    Signature of Officer

_____________________________________________
Signature of Joint Individual Subscriber

ACCEPTANCE OF SUBSCRIPTION BY SIOUXLAND ETHANOL, LLC:

Siouxland Ethanol, LLC hereby accepts the subscription for the above Units.

Dated this__________day of_____________, 200_____.

SIOUXLAND ETHANOL, LLC

By: _________________________________________

Its: ________________________________________

                                        6
<PAGE>

                     PROMISSORY NOTE AND SECURITY AGREEMENT

Date of Subscription Agreement: ___________________________________, 200__.

                                $10,000 PER UNIT

            MINIMUM INVESTMENT OF 2 UNITS ($20,000), 1 UNIT INCREMENTS
            THEREAFTER ($10,000)

__________  Number of Units subscribed

__________  Total Purchase Price ($10,000 per Unit multiplied by
            number of Units subscribed)

(________)  Less Initial Payment (10% of Principal Amount)

__________  Principal Balance

FOR VALUE RECEIVED, the undersigned hereby promises to pay to the order of
Siouxland Ethanol, LLC, a Nebraska limited liability company ("Siouxland"), at
its principal office located 110 East Elk Street, Jackson, Nebraska 68743, or at
such other place as required by Siouxland, the Principal Balance set forth above
in one lump sum to be paid without interest within 20 days following the call of
the Siouxland Board of Directors, as described in the Subscription Agreement. In
the event the undersigned fails to timely make any payment owed, the entire
balance of any amounts due under this full recourse Promissory Note and Security
Agreement shall be immediately due and payable in full with interest at the rate
of 12% per annum from the due date and any amounts previously paid in relation
to the obligation evidenced by this Promissory Note and Security Agreement may
be forfeited at the discretion of Siouxland.

The undersigned agrees to pay to Siouxland on demand, all costs and expenses
incurred to collect any indebtedness evidenced by this Promissory Note and
Security Agreement, including, without limitation, reasonable attorneys' fees.
This Promissory Note and Security Agreement may not be modified orally and shall
in all respects be governed by, construed, and enforced in accordance with the
laws of the State of Nebraska.

The provisions of this Promissory Note and Security Agreement shall inure to the
benefit of Siouxland and its successors and assigns, which expressly reserves
the right to pursue the undersigned for payment of the amount due thereon by any
legal means in the event that the undersigned defaults on obligations provided
in this Promissory Note and Security Agreement.

The undersigned waives presentment, demand for payment, notice of dishonor,
notice of protest, and all other notices or demands in connection with the
delivery, acceptance, performance or default of this Promissory Note and
Security Agreement.

The undersigned grants to Siouxland, and its successors and assigns ("Secured
Party"), a purchase money security interest in all of the undersigned's
Membership Units of Siouxland now owned or hereafter acquired. This security
interest is granted as non-exclusive collateral to secure payment and
performance on the obligation owed Secured Party from the undersigned evidenced
by this Promissory Note and Security Agreement. The undersigned further
authorizes Secured Party to retain possession of certificates representing such
Membership Units and to take any other actions necessary to perfect the security
interest granted herein.

Dated:      , 200 .

OBLIGOR/DEBTOR:                                 JOINT OBLIGOR/DEBTOR:

_____________________________________________   ________________________________
Printed or Typed Name of Joint Obligor          Printed or Typed Name of Obligor

By: _________________________________________   By: ____________________________
   (Signature)                                      (Signature)

_____________________________________________
Officer Title if Obligor is an Entity

_____________________________________________

_____________________________________________
Address of Obligor

                                       7
<PAGE>

                                   EXHIBIT "A"

                              MEMBER SIGNATURE PAGE

                                     ADDENDA
                                     TO THE
                              AMENDED AND RESTATED
                             OPERATING AGREEMENT OF
                             SIOUXLAND ETHANOL, LLC

      The undersigned does hereby represent and warrant that the undersigned, as
a condition to becoming a Member in Siouxland Ethanol, LLC, has received a copy
of the Amended and Restated Operating Agreement, dated February 24, 2005, and,
if applicable, all amendments and modifications thereto, and does hereby agree
that the undersigned, along with the other parties to the Amended and Restated
Operating Agreement, shall be subject to and comply with all terms and
conditions of said Amended and Restated Operating Agreement in all respects as
if the undersigned had executed said Amended and Restated Operating Agreement on
the original date thereof and that the undersigned is and shall be bound by all
of the provisions of said Amended and Restated Operating Agreement from and
after the date of execution hereof.

INDIVIDUALS:                                    ENTITIES:

_____________________________________________   ________________________________
     Name of Individual Member (Please Print)   Name of Entity (Please Print)

_____________________________________________   ________________________________
     Signature of Individual                    Print Name and Title of Officer

_____________________________________________   ________________________________
     Name of Joint Individual Member            Signature of Officer
      (Please Print)

_____________________________________________
     Signature of Joint Individual Member

Agreed and accepted on behalf of the
Company and its Members:

SIOUXLAND ETHANOL, LLC

By:__________________________________________

Its:_________________________________________

                                        1

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