Document:

<PAGE>   1
                                                                   EXHIBIT 10.30

SECOND AMENDMENT TO
EMPLOYMENT AND
STOCK OWNERSHIP AGREEMENT
                                                        UNITED STATES OF AMERICA
BY AND BETWEEN
                                                        STATE OF LOUISIANA
ENERGY PARTNERS, LTD.
                                                        PARISH OF ORLEANS
AND

[NAME OF EMPLOYEE]

                  THIS SECOND AMENDMENT TO EMPLOYMENT AND STOCK OWNERSHIP
AGREEMENT (this "Second Amendment") is entered into in New Orleans, Louisiana on
this 29th day of September, 2000, by and between [Name of Employee], an
individual of the full age of majority domiciled in the Parish of Orleans, State
of Louisiana (hereinafter called "Employee"), and Energy Partners, Ltd., a
corporation organized and existing under the laws of the State of Delaware
(hereinafter called the "Company"), represented herein by its duly authorized
President, Richard A. Bachmann.

                  WHEREAS, Employee and the Company entered into that certain
Employment and Stock Ownership Agreement dated June 5, 1998;

                  WHEREAS, Employee and the Company entered into that certain
First Amendment to Employment and Stock Ownership Agreement dated November 17,
1999;

                  WHEREAS, Employee entered into a Stockholder Agreement dated
November 17, 1999, by and among the Company, Employee and the other shareholders
of the Company named therein;

                  WHEREAS, concurrent with the execution hereof, Employee is
entering into a First Amendment to Stockholder Agreement dated September 29,
2000 ("First Amendment"), by and among the Company, Employee and the other
shareholders of the Company named therein;

                  NOW, THEREFORE, the parties agree as follows:

                  1. The definition of "Stockholder Agreement" contained in
Section 2.2 shall mean such Stockholder Agreement as amended by the First
Amendment.

                  2. Section 2.7 is amended by adding the following at the end
thereof:
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                                      - 2 -

              "; provided further, however, if the Employee's employment
              terminates as contemplated in this Section 2.7 other than in the
              circumstances set forth in the immediately preceding proviso, the
              number of Shares that may be acquired as set forth in Section 2.12
              shall, depending on the date the Employee's employment terminates,
              be equal to the number of Shares owned by Employee on the date of
              this Second Amendment multiplied by the following fraction:

<TABLE>
<CAPTION>
                  Fraction
                 of Shares                          Date of Termination
                 ---------                          -------------------
<S>                                   <C>
                   3/4                On or after date of consummation of
                                      Qualifying Public Offering and before
                                      first anniversary of Qualifying Public
                                      Offering
                   1/2                On or after first anniversary
                                      of Qualifying Public Offering
                                      and before second anniversary
                                      of Qualifying Public Offering
                   1/4                On or after second anniversary
                                      of Qualifying Public Offering
                                      and before third anniversary
                                      of Qualifying Public Offering
                   0                  On or after third anniversary of
                                      Qualifying Public Offering
</TABLE>

                  3. This Second Amendment shall become effective upon
consummation of a Qualifying Public Offering.
<PAGE>   3
                                     - 3 -

                  IN WITNESS WHEREOF, the parties hereto have set forth their
hand on the day, month and year first above written in multiple originals, each
of which shall have the same force and effect as if it were the same original.

WITNESSES:                              ENERGY PARTNERS, LTD.

                                        By:
Name:                                        Name:    Richard A. Bachmann
                                             Title:   President

Name:

WITNESSES:

                                        By:
Name:                                        Name:

Name:

WITNESSES:                              ACKNOWLEDGED AND AGREED
                                        TO THE TERMS HEREOF:

                                        By:
Name:                                        Spouse

Name:<PAGE>   1
                                                                   EXHIBIT 10.31

EMPLOYMENT AND                                          UNITED STATES OF AMERICA
STOCK OWNERSHIP
AGREEMENT                                               STATE OF LOUISIANA

BY AND BETWEEN                                          PARISH OF ORLEANS

ENERGY PARTNERS, LTD.

AND

MAUREEN O'CONNOR SULLIVAN

         THIS EMPLOYMENT AND STOCK OWNERSHIP AGREEMENT (the "Agreement"),
entered into in New Orleans, Louisiana on this 2nd day of October, 2000 by and
between Maureen O'Connor Sullivan, an individual of the full age of majority
domiciled in the Parish of Orleans, State of Louisiana (hereinafter called
"Employee") and Energy Partners, Ltd., a corporation organized and existing
under the laws of the State of Delaware (hereinafter called "Company"),
represented herein by its duly authorized President, Richard A. Bachmann.

1.0      TERMS AND CONDITIONS OF EMPLOYMENT.

         1.1      Length of Employment. In consideration for the compensation
                  set forth in Section 1.2, Employee shall be employed as
                  Company's Vice President, General Counsel and Secretary for a
                  period of three (3) years from the date of execution of this
                  Agreement (the "Term"). Company may terminate Employee's
                  employment at any time for "Cause". "Cause" as used herein
                  shall consist of the following: (a) willful refusal to perform
                  assigned functions; (b) insubordination; (c) embezzlement; (d)
                  intoxication or drug abuse which interferes with job
                  performance; (e) wrongful disclosure of confidential Company
                  information; (f) conflict of interest which is undisclosed and
                  not Board approved; (g) conviction of a felony; (h) engaging,
                  directly or indirectly, in a business which is competitive to
                  the business of Company, as an employee, officer, director,
                  shareholder, partner, agent or independent contractor which is
                  undisclosed and not Board approved; and (i) incompetence.
                  Within thirty (30) days of execution of this Agreement,
                  Employee shall prepare a written disclosure statement of all
                  business relationships in which she may continue to be an
                  employee, officer, director, shareholder, partner, agent or
                  independent contractor. A Cause determination shall be in
                  Company's sole discretion.

         1.2      Consideration. As compensation, Employee shall receive a
                  minimum annual salary of $175,000 payable in accordance with
                  the normal payroll practices of Company. Employee will receive
                  annual salary reviews. Company will reimburse Employee for
                  rea-
<PAGE>   2
                                       -2-

                  sonable moving expenses in connection with Employee's
                  relocation to New Orleans. In addition, Employee will
                  participate with other senior executives of Company in
                  compensation and benefit plans in effect from time to time,
                  including the 401(k) plan and bonus program, and health and
                  dental benefits.

         1.3      Vacation Time. Employee shall be entitled to six (6) weeks of
                  paid vacation per calendar year, which shall be taken at times
                  mutually agreeable to Employee and Company; provided, however,
                  that for calendar year 2000, Employee's vacation time shall be
                  eight (8) days. The Company, in its discretion, may advance
                  vacation days as requested by Employee. The vacation time must
                  be used in each calendar year and will not be carried forward
                  to succeeding years.

         1.4      Indemnity. Company shall indemnify and hold harmless Employee
                  from and against any and all claims and liabilities to which
                  Employee may be or become subject by reason of Employee now or
                  hereafter being an employee, officer and/or director of the
                  Company and/or by reason of Employee's alleged acts or
                  omissions, whether or not Employee continues to be such
                  employee, officer and/or director at the time when any such
                  claim or liability is asserted, to the fullest extent
                  permitted by Delaware law and Company's charter documents and
                  by-laws as in effect from time to time, and shall reimburse
                  Employee for all legal and other expenses reasonably incurred
                  by Employee in connection therewith to the extent permitted.

         1.5      Non-Competition Agreement. Company and Employee acknowledge
                  that Company is engaged in the business of owning, operating,
                  producing and exploring for mineral interests, and other
                  related activities. For a period of two (2) years following
                  termination of employment (the last day on which Employee is
                  actively engaged in employment on Company's behalf), Employee
                  will not compete directly or indirectly with Company as to any
                  existing contract to which Company is a party, and/or as to
                  any business of Company evidenced by contracts, agreements,
                  letters of intent, confidentiality agreements, or written
                  proposals in existence on the date of termination of
                  employment. The parties acknowledge that the remedy at law for
                  any breach, whether jointly or severally, of this
                  non-competition clause of this Agreement, all of which is
                  deemed material, will be inadequate and the parties hereby
                  agree that Company shall be entitled to injunctive relief by a
                  court of competent jurisdiction enjoining and restraining her
                  from the continuance of any such act which constitutes a
                  breach hereof. In addition to injunctive relief, Company
                  reserves the right to seek any damages to which it may be
                  entitled as a consequence of Employee's breach of this
                  Agreement.

2.0      SHARES.

         2.1      Receipt of Shares. Subject to the terms and conditions of this
                  Agreement, Employee will receive on the date of the initial
                  public offering of Company's common stock (the "IPO") a number
                  of shares of restricted common stock of the Company determined
                  by dividing $350,000 by the per share offering price in the
                  IPO (rounding upward to the
<PAGE>   3
                                      -3-

                  nearest whole share). Such shares will vest as follows: 10/35
                  on the second anniversary of the date of this Agreement and
                  the remaining 25/35 on the third anniversary of the date of
                  this Agreement.

         2.2      Receipt of Options. Subject to the terms and conditions of
                  this Agreement and the terms and conditions of Company's 2000
                  Long Term Stock Incentive Plan ("Stock Incentive Plan"),
                  Employee will receive on the date of the IPO an option to
                  purchase 20,000 shares of common stock of the Company at a per
                  share exercise price equal to the per share offering price in
                  the IPO. Such option shall vest and become exercisable in
                  three installments as follows: one-third on the first
                  anniversary of the date of this Agreement, one-third on the
                  second anniversary of the date of this Agreement, and the
                  remaining one-third on the third anniversary of the date of
                  this Agreement. Employee must exercise each option within ten
                  (10) years from the date of this Agreement or the option will
                  lapse. Employee shall be eligible to receive additional option
                  grants under the Stock Incentive Plan beginning in 2001.

         2.3      Transfer of Shares. No shares may be sold, assigned, pledged,
                  transferred or otherwise alienated (each, "Transferred")
                  except in accordance with and pursuant to the terms and
                  conditions of this Agreement, including without limitation
                  Section 3.4 of this Agreement.

         2.4      Restrictions on Transfer. Any Transfer or attempted Transfer
                  by Employee in violation of this Agreement shall be null and
                  void and of no force or effect whatever. Any purported
                  transferee shall not be deemed to be a shareholder of Company
                  and shall not be entitled to receive a new certificate or any
                  distributions on or with respect to the shares owned by
                  Employee. Employee hereby acknowledges the reasonableness of
                  the restrictions on Transfer imposed by this Agreement in view
                  of Company's purposes and the relationship of Employee with
                  Company. Accordingly, the restrictions on Transfer contained
                  herein shall be specifically enforceable. Employee hereby
                  further agrees to hold Company and each other shareholder
                  (each shareholder's successors and assigns) wholly and
                  completely harmless from any cost, liability or damage
                  (including, without limitation, liabilities for income taxes
                  and costs of enforcing this indemnity) incurred by any of such
                  indemnified persons as a result of a Transfer or attempted
                  Transfer in violation of this Agreement.

         2.5      Legend. In addition to other legends required under applicable
                  securities laws, the shares which are subject to this
                  Agreement shall contain the following legend:

                          "The shares represented by this certificate may not be
                          sold or otherwise transferred except pursuant to the
                          Employment and Stock Ownership Agreement, dated
                          October 2, 2000, by and between the shareholder to
                          whom this certificate was issued, the shareholder's
                          spouse and Energy Partners, Ltd., a copy of which is
                          on file in the office of the corporate Secretary of
                          the Company."
<PAGE>   4
                                       -4-

                  All shares of common stock hereafter issued to Employee or to
                  Employee's beneficiaries, heirs, successors in interest,
                  representatives or assigns with respect to any shares subject
                  to this Agreement, whether by stock split, stock dividend or
                  otherwise, shall bear the same endorsement and be subject to
                  all the terms and conditions hereof.

         2.6      Shareholder Rights Upon Judgment of Separation or Divorce. In
                  the event of a judgment of separation or divorce involving
                  Employee in which all or any portion of Employee's shares are
                  transferred to Employee's spouse/ex-spouse, Employee shall
                  have sixty (60) days from the date of such transfer to
                  purchase said shares from the spouse/ex-spouse. If the Shares
                  are owned as community property or in joint ownership,
                  Employee's spouse shall execute this Agreement in
                  acknowledgment and agreement to such sale of shares. The
                  spouse, by executing this Agreement, shall also acknowledge
                  and agree that following such sale of their shares, the spouse
                  will have no further interest whatsoever in this Agreement or
                  any claims under it. This provision shall be inapplicable if
                  any Employee's spouse/ex-spouse is also an employee of the
                  Company and holds shares in his own name.

         2.7      Interests of Employee Spouse Upon Death. By executing this
                  Agreement, the spouse of Employee agrees to execute within
                  sixty (60) days hereof, a valid last will and testament
                  containing a legacy to Employee consisting of all interests in
                  the shares that Employee owns jointly or through a community
                  property regime. The last will and testament shall also
                  contain a provision that should such disposition impinge upon
                  the legitime of the spouse's forced heirs, that Employee shall
                  have the right within six (6) months of the spouse's death to
                  purchase such shares.

         2.8      Employee's For Cause Termination. Company may terminate
                  Employee's employment and all of the Company's obligations
                  under this Agreement at any time for Cause as defined in
                  Section 1.1 above upon written notice. If Employee is
                  terminated for Cause, all stock received pursuant to Section
                  2.1 and vested as set forth in Section 2.1 or Section 2.11
                  shall be the property of Employee, but any stock that has not
                  vested as set forth in Section 2.1 or Section 2.11 on the
                  termination date for Cause will be forfeited. Similarly, if
                  Employee is terminated for Cause, all options described in
                  Section 2.2 which have vested as set forth in Section 2.2 or
                  2.11 prior to termination for Cause shall be the property of
                  and exercisable by Employee for a 30 day period following
                  termination, but any option rights which have not vested prior
                  to termination for Cause will be forfeited.

         2.9      Employee's Termination Upon Death or Disability. Employee's
                  employment and Company's obligations under this Agreement
                  shall terminate automatically, effective immediately and
                  without any notice, upon Employee's death or a determination
                  of Disability of Employee. For purposes of this Agreement,
                  "Disability" means the inability of Employee, due to a
                  physical or mental impairment, for 90 days (whether or not
                  consecutive) during any period of 360 days to perform the
                  duties and functions contemplated by this Agreement. A
                  determination of Disability shall be made by the Board of
<PAGE>   5
                                       -5-

                  Directors in consultation with a physician satisfactory to
                  Company, and Employee shall cooperate with the efforts to make
                  such determination. Any such determination shall be conclusive
                  and binding on the parties. Any determination of Disability
                  under this Section 2.9 is not intended to alter any benefits
                  any party may be entitled to receive under any long-term
                  disability insurance policy maintained by either Company or
                  Employee with respect to Employee, which benefits shall be
                  governed solely by the terms of any such insurance policy. If
                  Employee is terminated due to death or disability, as defined
                  above, (i) all stock which has vested prior to termination
                  shall be the property of Employee and any stock which has not
                  vested prior to termination will be forfeited, and (ii) all
                  stock options will be governed by the terms of the Stock
                  Incentive Plan and all vested stock options will remain
                  exercisable for 36 months following the date of death or
                  disability.

         2.10     Employee's Termination Without Cause. Company may terminate
                  Employee's employment and all of Company's obligations under
                  this Agreement without Cause at any time by ninety (90) days
                  written notice to Employee. If Employee is terminated without
                  Cause, all stock, options, bonuses and other incentive awards
                  granted to Employee pursuant to this Agreement or otherwise
                  (i) which have not vested prior to such termination and (ii)
                  as to which there are no conditions for vesting other than
                  continued employment with Company, shall upon such notice of
                  termination become fully vested, shall (in the case of
                  options) become fully exercisable and (in the case of all such
                  stock, options, bonuses and other incentive awards) all
                  restrictions shall lapse. In such event, all such options
                  shall remain exercisable for the remainder of their term.

         2.11     Change of Control. If a Change of Control (as defined in the
                  Stock Incentive Plan) occurs, all stock, options, bonuses and
                  other incentive awards granted to Employee pursuant to this
                  Agreement or otherwise (i) which have not vested prior to such
                  Change of Control and (ii) as to which there are no conditions
                  for vesting other than continued employment with Company,
                  shall upon such Change of Control become fully vested, shall
                  (in the case of options) become fully exercisable and (in the
                  case of all such stock, options, bonuses and other incentive
                  awards) all restrictions shall lapse. In such event, all such
                  options shall remain exercisable for the remainder of their
                  term.

         2.12     Voluntary Termination by Employee. If Employee voluntarily
                  terminates her employment with Company, all of Company's
                  obligations under this Agreement shall terminate. If Employee
                  voluntarily terminates her employment with Company, all stock
                  vested as set forth in Section 2.1 or Section 2.11 shall be
                  the property of Employee, but any stock that has not vested as
                  set forth in Section 2.1 or Section 2.11 on the termination
                  date shall be forfeited. Similarly, if Employee voluntarily
                  terminates her employment with Company, all options described
                  in Section 2.2 which have vested as set forth in Section 2.2
                  or 2.11 prior to termination shall be the property of and
                  exercisable by Employee for a 30 day period following
                  termination, but any options which have not vested will be
                  forfeited.
<PAGE>   6
                                       -6-

3.0      MISCELLANEOUS.

         3.1      Entire Agreement. Employee acknowledges that she has
                  concurrently executed the Registration Rights Agreement (as
                  set forth on Exhibit A attached hereto). Without limiting the
                  generality of the foregoing, this Agreement embodies the
                  entire agreement between the parties hereto regarding the
                  subject matter hereof, and shall supersede any and all prior
                  agreements whether written or oral relating to employment
                  and/or shares of Company owned by Employee, and shall be
                  binding upon Employee and Employee's heirs, legatees, legal
                  representatives, successors, donees, transferees and assigns,
                  and Employee does hereby authorize and obligate Employee's
                  executors, heirs and legatees to comply with the terms of this
                  Agreement. The parties shall not be bound by or be liable for
                  any statement, representation, promise, inducement or
                  understanding of any kind or nature regarding the subject
                  matter hereof which is not set forth herein. No changes,
                  amendments or modifications of any of the terms or conditions
                  of this document shall be valid unless reduced to writing and
                  signed by all parties hereto, Company being represented by its
                  President or his designee.

         3.2      Registration Rights Agreement. The Registration Rights
                  Agreement is hereby acknowledged and accepted as binding upon
                  Employee and Company as though employee was an original
                  signatory of such agreement.

         3.3      Compliance with Applicable Law. The completion of any transfer
                  or sale of any shares of Company's capital stock (or any
                  rights to acquire such shares or securities convertible into,
                  or exchangeable for, such shares) by Employee shall be subject
                  to compliance with any applicable statute, law, regulation,
                  ordinance, rule, judgment, rule of common law, order, decree,
                  award, governmental approval, concession, grant, franchise,
                  license, agreements, directive, guideline, policy,
                  requirement, or other governmental restriction or any similar
                  form of decision of, or determination by, or any
                  interpretation or administration of any of the foregoing by,
                  any governmental authority (collectively, "Applicable Law").
                  Company and Employee shall cooperate with each other and shall
                  take all such action, including without limitation obtaining
                  all governmental approvals required to comply with Applicable
                  Law in connection with the sale or transfer of any shares of
                  capital stock of Company (or any rights to acquire such shares
                  or securities convertible into, or exchangeable for, such
                  shares). Company, Employee and each of the other shareholders
                  of Company shall bear their own costs and expenses in
                  connection with obtaining any such governmental approvals.

         3.4      Restrictions on Transfer. Employee agrees that any shares of
                  Company's Common Stock held by Employee shall be subject to
                  the transfer restrictions set forth in Section 2.1(c) of the
                  Stockholder Agreement dated as of November 17, 1999 as amended
                  by the First Amendment thereto (as set forth in Exhibit B
                  attached hereto) and as the same may hereafter be amended in
                  accordance with the terms of said Stockholder Agreement, to
                  the same extent as if Employee were a Management Shareholder
                  within the meaning of said Stockholder Agreement and as if all
                  such shares were owned on the date of the
<PAGE>   7
                                       -7-

                  First Amendment; provided, however, that this Section 3.4
                  shall cease to apply in the event said Stockholder Agreement
                  is no longer in effect.

         3.5      Severability. If any provision of this Agreement shall be
                  declared unlawful or incapable of execution, such facts shall
                  in no way affect the validity of any other portion hereof
                  which can be given reasonable effect without the provision
                  declared invalid or incapable of execution; nor shall such
                  fact operate to nullify or rescind this Agreement, but shall
                  only serve to render ineffective the provisions declared
                  invalid of the remainder, or the intent of the Agreement as a
                  whole.

         3.6      Applicable Law. This document shall be construed for all
                  purposes as a Louisiana document and shall be interpreted and
                  enforced in accordance with the laws of the State of
                  Louisiana; provided however, that the non-compete provisions
                  set forth in Subparagraph 1.5 hereof shall governed by the law
                  of the state where the alleged competition occurs, whether in
                  Louisiana or some other state.

         3.7      Number and Gender. As used herein, the singular shall include
                  the plural and vice versa and words used in one gender shall
                  include all others as appropriate.

         3.8      Additional Documents. The parties hereto agree to execute
                  whatever documents or instruments and to perform whatever acts
                  may be reasonably required to fulfill the requirements and/or
                  intents hereof.

         3.9      Legal Assistance. The parties hereto have each consulted with
                  legal counsel or have had the opportunity to consult with
                  legal counsel regarding the terms and conditions of this
                  Agreement.

         3.10     Initial Public Offering. The parties agree that they will
                  re-negotiate the terms of this Agreement in good faith if
                  Company's initial public offering has not been consummated by
                  May 1, 2001.

         IN WITNESS WHEREOF, the parties hereto have set forth their hand and
seal on the day, month and year first above written in multiple originals, each
of which shall have the same force and effect as if it were the sole original.

WITNESSES:                             ENERGY PARTNERS, LTD.

/s/ WITNESS                            By: /s/ RICHARD A. BACHMANN
                                           Richard A. Bachmann
/s/ WITNESS                                President and Chief Executive Officer

                                           /s/ MAUREEN O'CONNOR SULLIVAN
                                           Maureen O'Connor Sullivan

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