Document:

Indemnification Rights and Contribution Agreement

 Exhibit 10.15 
 INDEMNIFICATION RIGHTS AND CONTRIBUTION AGREEMENT 
 THIS
INDEMNIFICATION RIGHTS AND CONTRIBUTION AGREEMENT (the “Agreement”) is made and entered into as of September 17, 2010, by and between Rho Ventures IV, L.P., Rho Ventures IV (QP), L.P., Rho Ventures IV GmbH & Co.
Beteiligungs KG, and Rho Management Trust I (collectively, the “Fund”) and VERENIUM CORPORATION, a Delaware corporation (the “Company”) (collectively, the “Parties”). 

WHEREAS, certain individuals affiliated with the Fund (“Fund Indemnitees”) serve as members of
the Company’s board of directors; 
 WHEREAS, the Fund and certain of its affiliates (collectively,
the “Fund Indemnitors”) have granted certain rights to indemnification, advancement of expenses and/or insurance to the Fund Indemnitees; 
 WHEREAS, the Company has granted certain rights to indemnification, advancement of expenses and/or insurance to the Fund Indemnitees pursuant to one or more agreements and documents, including
without limitation, the Certificate of Incorporation and/or Bylaws of the Company (or any other agreement between the Company and Fund Indemnitee whereby the Company provides rights to indemnification, advancement of expenses and/or insurance to the
Fund Indemnitees) (collectively, the “Indemnification Agreements”), one or more of which may have been executed in connection with the appointment of Fund Indemnitees as directors of the Company; 

WHEREAS, it is the intent of the Parties that the rights to indemnification, advancement of expenses and/or
insurance granted by the Fund Indemnitors be secondary to the primary obligation of the Company to indemnify and/or insure Fund Indemnitees pursuant to the Indemnification Agreements; and 

WHEREAS, this Agreement is meant to supplement and clarify, and not to contradict or conflict with, the
Indemnification Agreements. 
 NOW, THEREFORE, in consideration of the foregoing recitals, the promises
contained herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties agree as follows: 
 1. Recitals. The foregoing recitals are true and correct, and hereby incorporated herein. 
 2. Indemnification Obligations. The Parties hereby acknowledge that the Fund Indemnitees have certain rights to indemnification, advancement of expenses and/or insurance provided by the Fund
Indemnitors and the Company and certain of their affiliates. The Company hereby agrees that with regard to any claim arising on or after the earliest date of an Indemnification Agreement (i) it is the indemnitor of first resort (i.e., its
obligations to Fund Indemnitees are primary and any obligation of the Fund Indemnitors to advance expenses or to provide indemnification for the same expenses or liabilities incurred by Fund Indemnitees are secondary), and (ii) it shall be
required to advance all expenses and other amounts incurred by Fund Indemnitees to the extent required by the terms of the Indemnification Agreements and shall be liable for all expenses, judgments, penalties, fines, amounts paid in settlement to
the extent legally permitted, and other amounts as required by the terms of the Indemnification Agreements, without regard to any rights a Fund Indemnitee may have against the Fund Indemnitors. 

3. Contribution Rights. 

(a) The Company irrevocably waives, relinquishes and releases the Fund Indemnitors from any and all claims against the
Fund Indemnitors arising on or after the respective dates of the Fund Indemnitees’ election or appointment to the Company’s board of directors (each an “Election Date”) for contribution, subrogation or any other recovery
of any kind in respect thereof. 
 (b) The Company further agrees that no advancement or payment by the Fund
Indemnitors on behalf of a Fund Indemnitee with respect to any claim arising on or after an Election Date for which such Fund Indemnitee is entitled to indemnification from the Company shall affect the rights granted hereunder, and the Fund

 
Indemnitors shall have a right of contribution equal to 100% of any amounts advanced or paid by the Fund Indemnitors to the Fund Indemnitee relating to such claim and/or be subrogated to the
extent of such advancement or payment to all of the rights of recovery of such Fund Indemnitee against the Company. For the avoidance of doubt, if a Fund Indemnitor, for example, advances payment or indemnifies a Fund Indemnitee for $1000.00 for a
claim for which such Fund Indemnitee is also entitled to indemnification by the Company, then the Company shall be obligated to make a payment or contribution to such Fund Indemnitors of $1000.00. 

7. Delivery of Notices. Any notices required or permitted hereunder shall be made or provided in accordance
with, and otherwise governed by the terms of the Indemnification Agreements between the Company and the Fund Indemnitees. 
 8. Remedies. All remedies afforded to the Fund Indemnitors by this Agreement are separate and cumulative remedies and no one of such remedies, whether or not exercised by the Fund
Indemnitors, shall limit any of the other remedies available to the Fund Indemnitors and shall in no way limit or prejudice any other remedy which the Fund Indemnitors may have. Mere delay or failure to act shall not preclude the exercise or
enforcement of any rights and remedies available to the Fund Indemnitors hereunder. 
 9. Costs and
Expenses. The Company shall pay or reimburse the Fund Indemnitors on demand for all out of pocket expenses (including in each case all reasonable fees and expenses of counsel) incurred by the Fund Indemnitors arising out of or in connection
with the enforcement of this Agreement against the Company or arising out of or in connection with any failure of the Company to fully and timely perform its obligations hereunder. 

10. Amendments. This Agreement can be waived, modified, amended, terminated or discharged only by the
written agreement of each of the Parties. 
 11. Successors and Assigns. This Agreement shall be
binding upon and shall inure to the benefit of the Parties and their respective successors and permitted assigns. Notwithstanding anything contained in this Agreement to the contrary, nothing in this Agreement, expressed or implied, is intended to
confer on any person other than the Parties or their respective heirs, successors, executors, administrators and permitted assigns, any rights, remedies, obligations or liabilities under or by reason of this Agreement. 

12. Third Party Beneficiaries. The Parties agree that any affiliate of the Fund that has granted rights to
indemnification, advancement of expenses and/or insurance to the Fund Indemnitees is an express third party beneficiary to the terms of this Agreement. 
 13. Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of Delaware. The parties hereto knowingly, voluntarily and intentionally waive
any right any of them may have to a trial by jury with respect to any litigation based hereon, or arising out of, under or in connection with this Agreement. 
 14. Jurisdiction and Venue. With respect to any suit, action or proceeding relating to this Agreement (“Proceedings”), each party irrevocably submits to the exclusive
jurisdiction of the Chancery Court of the State of Delaware, and each party hereby waives any objection which it may have at any time to the laying of venue of any Proceedings brought in such court, waives any claim that such Proceedings have been
brought in an inconvenient forum and further waives the right to object with respect to such Proceedings that such court does not have jurisdiction over such party. 

15. Counterparts; Facsimile. This Agreement may be executed simultaneously in one or more counterparts,
each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. This Agreement may be executed by facsimile or other mutually agreed electronic transmission. 

[Remainder of Page Intentionally Left Blank] 

 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed as of the date and year first above written. 
  

			
	 COMPANY:

	
	 VERENIUM CORPORATION

		
	 By:
	 	 /s/ Carlos Riva

	 Name: Carlos Riva

	 Title:   Chief Executive Officer

 FUND: 
  

									
	 Rho Ventures IV, L.P.
 By: Rho Management Ventures IV, L.L.C.
 General Partner
	 		 	 Rho Ventures IV (QP), L.P.
 By: Rho Management Ventures IV, L.L.C.
 General Partner

					
	 By:
	 	 /s/ Jeffrey I. Martin
	 		 	 By:
	 	 /s/ Jeffrey I. Martin

		 	 Name: Jeffrey I. Martin
	 		 		 	 Name: Jeffrey I. Martin

		 	 Title: Attorney-In-Fact
	 		 		 	 Title: Attorney-In-Fact

			
	 Rho Ventures IV GmbH & Co.

Beteiligungs KG
 By: Rho Capital Partners Verwaltungs GmbH
 General Partner
	 		 	 Rho Management Trust I
 By: Rho Capital Partners Inc.
 As Investment Advisor

					
	 By:
	 	 /s/ Jeffrey I. Martin
	 		 	 By:
	 	 /s/ Jeffrey I. Martin

		 	 Name: Jeffrey I. Martin
	 		 		 	 Name: Jeffrey I. Martin

		 	 Title:   Attorney-In-Fact
	 		 		 	 Title: Attorney-In-FactEmployment Agreement

  
 Exhibit 10.2

 EMPLOYMENT AGREEMENT 

between 
 DOMENIC J. DELL’OSSO,
JR. 
 and 
 CHESAPEAKE
ENERGY CORPORATION 
 Effective November 5, 2010 

  
 EMPLOYMENT AGREEMENT

 THIS AGREEMENT is made effective November 5, 2010, between CHESAPEAKE ENERGY CORPORATION, an Oklahoma
corporation (the “Company”), and DOMENIC J. DELL’OSSO, JR., an individual (the “Executive”). 
 W I T N E S S E
T H: 
 WHEREAS, the Company desires to retain the services of the Executive and the Executive desires to make the
Executive’s services available to the Company. 
 NOW, THEREFORE, in consideration of the mutual promises herein
contained, the Company and the Executive agree as follows: 
  

	1.	 Employment.    The Company hereby employs the Executive and the Executive hereby accepts such employment subject to the terms and
conditions contained in this Agreement. The Executive is engaged as an Executive of the Company, and the Executive and the Company do not intend to create a joint venture, partnership or other relationship which might impose a fiduciary obligation
on the Executive or the Company in the performance of this Agreement. 

  

	2.	 Executive’s Duties.    The Executive is employed on a full-time basis. Throughout the term of this Agreement, the Executive
will use the Executive’s best efforts and due diligence to assist the Company in achieving the most profitable operation of the Company and the Company’s affiliated entities consistent with developing and maintaining a quality business
operation. The Executive shall also devote all of Executive’s working time, attention and energies to the performance of Executive’s duties and responsibilities under this Agreement. 

 

	 	2.1	 Specific Duties.    The Executive will serve as Executive Vice President and Chief Financial Officer for the Company, and in such
other positions as are mutually agreed upon by the parties. The Executive shall perform all of the duties required to fully and faithfully execute the office and position to which the Executive is appointed, and such other duties as may be
reasonably requested by the Executive’s supervisor. During the term of this Agreement, the Executive may be nominated for election or appointed to serve as a director or officer of any of the Company’s affiliated entities as determined in
such affiliates’ Board of Directors’ sole discretion. The services of the Executive will be requested and directed by the Chief Executive Officer, Mr. Aubrey K. McClendon. 

 

	 	2.2	 Rules and Regulations.    The Company has issued various policies and procedures applicable to employees and the Executive
including an Employment Policies Manual which sets forth the general human resources policies of the Company and addresses frequently asked questions regarding the Company. The Executive agrees to comply with such policies

  
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and procedures except to the extent inconsistent with this Agreement. Such policies and procedures may be changed or adopted in the sole discretion of the Company without advance notice.

  

	 	2.3	 Stock Investment.    The Executive acknowledges that the Executive is expected to own not less than twenty-five thousand
(25,000) shares of the Company’s common stock at all times after December 31, 2011 and prior to termination of the Agreement. In the event the Executive’s stock investment is less than 25,000 shares, the Executive will have a
grace period of at least ninety (90) days to restore the Executive’s stock investment to the guideline amount. The Compensation Committee of the Board of Directors (the “Compensation Committee”) may, in its discretion, extend the
grace period for complying with the Executive’s stock investment guideline. The Company has no obligation to sell to or to purchase from the Executive any of the Company’s stock in connection with this paragraph and has made no
representations or warranties regarding the Company’s stock, operations or financial condition. 

  

	3.	 Other Activities.    Except as provided in this Agreement or approved by the Compensation Committee, or its designee, as
applicable, in writing, the Executive agrees not to: (a) engage in other business activities independent of the Company; (b) serve as a general partner, officer, executive, director or member of any corporation, partnership, company or
firm; or (c) directly or indirectly invest, participate or engage in the Oil and Gas Business. For purposes of this Agreement the term “Oil and Gas Business” means: (i) producing oil and gas; (ii) drilling, owning or
operating an interest in oil and gas leases or wells; (iii) providing material or services to the Oil and Gas Business; (iv) refining, processing or marketing oil or gas; or (v) owning an interest in or assisting any corporation,
partnership, company, entity or person in any of the foregoing. The foregoing will not prohibit: (v) ownership of publicly traded securities; (w) ownership of royalty interests where the Executive owns or previously owned the surface of
the land covered in whole or in part by the royalty interest and the ownership of the royalty interest is incidental to the ownership of such surface estate; (x) ownership of royalty interests, overriding royalty interests, working interests or
other interests in oil and gas owned prior to the Executive’s date of first employment with the company and disclosed to the Company in writing; (y) ownership of royalty interests, overriding royalty interests, working interests or other
interests in oil and gas acquired by the Executive through a bona fide gift or inheritance subject to disclosure by Executive to the Company in writing; or (z) service as an officer or director of a not-for-profit organization. If the Executive
serves as a director or officer of a not-for-profit organization, the Executive shall disclose the name of the organization and their involvement in an annual disclosure statement, the form of which shall be provided by the Company.

  
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	4.	 Executive’s Compensation.    The Company agrees to compensate the Executive as follows: 

 

	 	4.1	 Base Salary.    A base salary (the “Base Salary”), at the initial annual rate of not less than Four Hundred Fifty
Thousand Dollars ($450,000.00) will be paid to the Executive in regular installments in accordance with the Company’s designated payroll schedule. The foregoing amount will increase to a minimum amount of not less than Five Hundred Thousand
Dollars ($500,000.00) for all of calendar year 2011 and not less than Six Hundred Thousand Dollars ($600,000) for all of calendar year 2012. 

  

	 	4.2	 Bonus.    In addition to the Base Salary described in paragraph 4.1 of this Agreement, the Company will pay to the Executive a
special bonus in the amount of One Hundred Thousand Dollars ($100,000.00) on November 12, 2010. Additionally, the Company will pay to the Executive guaranteed total bonus compensation during calendar year 2011 of not less than Five Hundred
Thousand Dollars ($500,000.00) and guaranteed bonus compensation during calendar year 2012 of not less than Seven Hundred Thousand Dollars ($700,000.00). Any such bonus compensation shall be paid to the Executive by separate check apart from
Executive’s Base Salary described above in paragraph 4.1, net of standard, appropriate employment-related deductions (including federal income tax at the applicable Supplemental Tax Withholding Rate), under the appropriate Internal Revenue
Service (“IRS”) guidelines and applicable state tax rules. Any additional bonus compensation will be at the absolute discretion of the Company in such amounts and at such times as the Board of Directors of the Company may determine. In
order to be entitled to receive bonus compensation as set forth herein, the Executive must be an active full-time employee of the Company on the date selected by the Company for such bonus compensation. 

 

	 	4.3	 Equity Compensation.    In addition to the compensation set forth in paragraphs 4.1 and 4.2 of this Agreement, effective
November 5, 2010, the Executive will be awarded Twenty Thousand (20,000) shares of CHK restricted stock from the Company’s various equity compensation plans, subject to the terms and conditions thereof. Additionally, the Executive
will be granted a minimum of One Million Two Hundred Fifty Thousand Dollars ($1,250,000.00) of CHK restricted stock during calendar year 2011 and a minimum of Two Million Four Hundred Thousand Dollars ($2,400,000.00) of CHK restricted stock during
calendar 2012. For purposes of this paragraph the value of a restricted stock award will be calculated using the closing stock price as of the business day on which the Compensation Committee of the Board of Directors approves the grant of such
award. In order to be entitled to the equity compensation set forth herein and any future equity compensation awarded, the Executive must be an active full-time employee of the Company on the grant dates. Further, the terms and provisions of the
Equity Compensation Plans control and direct the award of CHK restricted 

  
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stock and any conflict between this Agreement and the Equity Compensation Plans will be resolved in favor of the terms and provisions of the Equity Compensation Plans.

  

	 	4.4	 Benefits.    The Company will provide the Executive such retirement benefits, reimbursement of reasonable expenditures for dues,
travel and entertainment and such other benefits as are customarily provided to similarly situated executives of the Company and as are set forth in and governed by the Company’s Employment Policies Manual. The Company will also provide the
Executive the opportunity to apply for coverage under the Company’s medical, life and disability plans, if any. If the Executive is accepted for coverage under such plans, the Company will make such coverage available to the Executive on the
same terms as is customarily provided by the Company to the plan participants as modified from time to time. The Executive is subject to all of the terms and provisions of the Company’s benefit plans or policies. The following specific benefits
will also be provided to the Executive at the expense of the Company: 

  

	 	4.4.1	 PTO.    The Executive will be entitled to take one hundred seventy-six (176) hours of Paid Time Off (“PTO”),
calculated from the Executive’s anniversary date, during the term of this Agreement. No additional compensation will be paid for failure to take PTO. 

 

	 	4.4.2	 Membership Dues.    The Company will reimburse the Executive for: (a) the monthly dues necessary to maintain a full membership
in a club in the Oklahoma City area selected by the Executive; and (b) the reasonable cost of any approved business entertainment at such club. Such reimbursement shall be made within thirty (30) days of the date such costs are incurred
and submitted for reimbursement. All other costs, including, without implied limitation, any initiation costs, initial membership costs, personal use and business entertainment unrelated to the Company will be the sole obligation of the Executive
and the Company will have no liability with respect to such amounts. 

  

	 	4.5	 Change of Control Payment.    If, during the term of this Agreement, there is a Change of Control (as hereafter defined) the
Executive will be entitled to a lump sum payment (the “Change of Control Payment”) within thirty (30) days of the effective date of the Change of Control (in addition to any other amounts payable to the Executive under this Agreement or
otherwise) in an amount equal to two hundred percent (200%) of: (a) the Executive’s then current Base Salary under paragraph 4.1 of this Agreement and (b) the actual bonuses paid to the Executive during the twelve (12) calendar months preceding
the Change of Control under paragraph 4.2 of this Agreement or its predecessor. Additionally, upon the occurrence of such a Change of Control all Equity Compensation granted to the Executive under Section 4.3 of this Agreement will be immediately

  
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vested. For the purpose of this Agreement, a “Change of Control” means the occurrence of any of the following: 

 

	 	(a)	 the acquisition by any individual, entity or group (within the meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934, as amended
(the “Exchange Act”)) (a “Person”) of beneficial ownership (within the meaning of Rule 13d-3 promulgated under the Exchange Act) of thirty percent (30%) or more of either (i) the then outstanding shares of the
Company’s common stock (the “Outstanding CHK Common Stock”) or (ii) the combined voting power of the then outstanding voting securities of the Company entitled to vote generally in the election of directors (the “Outstanding
CHK Voting Securities”). For purposes of this paragraph, the following acquisitions by a Person will not constitute a Change of Control: (i) any acquisition directly from the Company; (ii) any acquisition by the Company;
(iii) any acquisition by or sponsored by Mr. Aubrey K. McClendon; (iv) any acquisition by any Executive benefit plan (or related trust) sponsored or maintained by the Company or any corporation controlled by the Company; or
(v) any acquisition by any corporation pursuant to a transaction which complies with clauses (i), (ii) and (iii) of paragraph (c) below; 

 

	 	(b)	 the individuals who, as of June 11, 2010, constitute the Board of Directors (the “Incumbent Board”) cease for any reason to constitute at least
a majority of the Board of Directors. Any individual becoming a director subsequent to the date hereof whose election, or nomination for election by the Company’s shareholders, is approved by a vote of at least a majority of the directors then
comprising the Incumbent Board will be considered a member of the Incumbent Board as of the date hereof, but any such individual whose initial assumption of office occurs as a result of an actual or threatened election contest with respect to the
election or removal of directors or other actual or threatened solicitation of proxies or consents by or on behalf of a Person other than the Incumbent Board will not be deemed a member of the Incumbent Board as of the date hereof;

  

	 	(c)	 the consummation of a reorganization, merger, consolidation or sale or other disposition of all or substantially all of the assets of the Company (a
“Business Combination”), unless following such Business Combination: (i) all or substantially all of the individuals and entities who were the beneficial owners, respectively, of the Outstanding CHK Common Stock and Outstanding CHK
Voting Securities immediately prior to such Business Combination beneficially own, directly or indirectly, more than sixty percent (60%) of, respectively, the then outstanding shares of common stock and the combined voting power of the then
outstanding voting 

  
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securities entitled to vote generally in the election of directors, as the case may be, of the corporation resulting from such Business Combination (including, without limitation, a corporation
which as a result of such transaction owns the Company or all or substantially all of the Company’s assets either directly or through one or more subsidiaries) in substantially the same proportions as their ownership, immediately prior to such
Business Combination of the Outstanding CHK Common Stock and Outstanding CHK Voting Securities, as the case may be, (ii) no Person (excluding any corporation resulting from such Business Combination or any Executive benefit plan (or related
trust) of the Company or such corporation resulting from such Business Combination) beneficially owns, directly or indirectly, thirty percent (30%) or more of, respectively, the then outstanding shares of common stock of the corporation
resulting from such Business Combination or the combined voting power of the then outstanding voting securities of such corporation except to the extent that such ownership existed prior to the Business Combination and (iii) at least a majority
of the members of the Board of Directors of the corporation resulting from such Business Combination were members of the Incumbent Board at the time of the execution of the initial agreement, or of the action of the Incumbent Board, providing for
such Business Combination; or, 

  

	 	(d)	 the approval by the shareholders of the Company of a complete liquidation or dissolution of the Company. 

 

	5.	 Term.    The employment relationship evidenced by this Agreement is an “at will” employment relationship and the Company
reserves the right to terminate the Executive at any time with or without cause as provided herein. In the absence of such termination, this Agreement will commence on November 5, 2010 and end on September 30, 2012 (the “Expiration
Date”). 

  

	6.	 Termination.    This Agreement will continue in effect until the expiration of the term stated in paragraph 5 of this Agreement
unless earlier terminated pursuant to this paragraph 6. 

  

	 	6.1	 Termination by Company.    The Company will have the following rights to terminate this Agreement: 

 

	 	6.1.1	 Termination without Cause.     The Company may terminate this Agreement without Cause at any time by the service of written notice
of termination to the Executive specifying an effective date of such termination not sooner than thirty (30) business days after the date of such notice (the “Termination Date”). In the event of elimination of the Executive’s job
position or reduction in duties and/or reassignment of the Executive to a new position of less 

  
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authority or reduction in Base Salary (collectively referred to as the “Good Reason Conditions”) the Executive may terminate this Agreement if the Executive provides notice to the
Company within ninety (90) days of the initial existence of the Good Reason Condition and a thirty (30) day period for the Company to cure the Good Reason Condition. If the Company fails to cure the Good Reason Condition within the thirty
(30) day cure period, the Executive may terminate this Agreement and it will be deemed to be a termination without Cause. In the event the Executive is terminated without Cause, the Executive will receive as termination compensation within
thirty (30) days of the Termination Date: (a) fifty-two (52) weeks of Base Salary in a lump sum payment; (b) all Equity Compensation granted to Executive under Section 4.3 of this Agreement and any Supplemental Matching
Contributions to the Chesapeake Energy Corporation Amended and Restated Deferred Compensation Plan (the “401(k) Make-Up Plan”) shall be immediately vested; and (c) payment of any PTO pay accrued through the Termination Date. The right
to the foregoing termination compensation under clauses (a) and (b) above is subject to the Executive’s execution of the Company’s severance agreement (including a release of all legally waivable claims if deemed appropriate by
the Company) against the Company and the Executive’s compliance with all of the provisions of this Agreement, including all post-employment obligations. 

 

	 	6.1.2	 Termination for Cause.    The Company may terminate the employment of the Executive hereunder at any time for Cause (as hereinafter
defined) (such a termination being referred to in this Agreement as a “Termination For Cause”) by giving the Executive written notice of such termination, which shall take effect immediately upon the giving of such notice to the Executive.
As used in this Agreement, “Cause” means (a) the Executive’s breach or threatened breach of this Agreement; (b) the Executive’s neglect of duties or failure to act, other than by reason of disability or death;
(c) the misappropriation, fraudulent conduct, or acts of workplace dishonesty by the Executive with respect to the assets or operations of the Company or any of its subsidiaries or affiliated companies; (d) the Executive’s failure to
comply with directives from superiors or written company policies; (e) the Executive’s personal misconduct which injures the Company and/or reflects poorly on the Company’s reputation; (f) the Executive’s failure to perform
Executive’s duties; or (g) the conviction of the Executive for, or a plea of guilty or no contest to, a felony or any crime involving moral turpitude. In the event this Agreement is terminated for Cause, the Company will not have any
obligation to provide any further payments or benefits to the Executive after the Termination Date other than any PTO pay accrued through the Termination Date. 

  
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	 	6.2	 Termination by Executive.    The Executive may voluntarily terminate this Agreement with or without cause by the service of written
notice of such termination to the Company specifying a Termination Date no sooner than thirty (30) days after the date of such notice. The Company reserves the right to end the employment relationship at any time after the notice date and to
pay Executive through the notice date. If this Agreement is terminated by the Executive in accordance with this paragraph: (a) the obligations of the parties will be controlled by paragraphs 6.3 and 6.6 of this Agreement; and (b) if the
termination is based in whole, or in part, on the breach by the Company of a material provision of this Agreement or another material obligation of the Company in favor of the Executive and the breach is not cured after thirty (30) days written
notice, the obligations of the parties will be controlled by paragraph 6.1.1 of this Agreement. 

  

	 	6.3	 Retirement by Executive.    In the event the Executive is fifty- five (55) years or older and terminates this Agreement under
paragraph 6.2 of this Agreement, the Executive will be (a) eligible for accelerated vesting of the unvested Equity Compensation awarded by the Company; and (b) eligible for accelerated vesting of the unvested Supplemental Matching
Contributions to the 401(k) Make-Up Plan. The accelerated vesting under clauses (a) and (b) of this paragraph will be in accordance with the retirement matrix (the “Retirement Matrix”) attached to this Agreement.

  

	 	6.4	 Incapacity of Executive.    If the Executive suffers from a physical or mental condition which in the reasonable judgment of the
Company’s management prevents the Executive in whole or in part from performing the duties specified herein for a period of three (3) consecutive months, the Executive may be terminated. Although the termination may be deemed as a
termination for Cause, the Executive will be entitled to receive within thirty (30) days of the Date of Termination: (a) a payment of twenty-six (26) weeks of Base Salary in a lump sum; (b) all Equity Compensation granted to the
Executive under Section 4.3 of this Agreement and any Supplemental Matching Contributions to the 401(k) Make-Up Plan shall be immediately vested; and (c) payment of any PTO pay accrued through the Termination Date. Notwithstanding the
foregoing, the amount payable under clause (a) above will be reduced by any benefits payable under any disability plans provided by the Company. The right to the foregoing compensation due under clauses (a) and (b) above is subject to
the execution by the Executive or the Executive’s legal representative of the Company’s severance agreement which will operate as a release of all legally waivable claims against the Company. In applying this section, the Company will
comply with any applicable legal requirements, including the Americans with Disabilities Act. 

  

	 	6.5	 Death of Executive.    If the Executive dies during the term of this Agreement, the Company may thereafter terminate this Agreement
without compensation except the Company will: (a) pay fifty-two (52) weeks of Base 

  
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Salary in a single lump sum payment within ninety (90) days of the date of the Executive’s death; (b) immediately vest all Equity Compensation granted to the Executive under
Section 4.3 of this Agreement and any Supplemental Matching Contributions to the 401(k) Make-Up Plan; and (c) pay any PTO pay accrued through the Termination Date. Amounts payable under this Section 6.5 shall be paid to the
beneficiary designated on the Company’s universal beneficiary designation form in effect on the date of the Executive’s death. If the Executive fails to designate a beneficiary or if such designation is ineffective, in whole or in part,
any payment that would otherwise have been paid under this Section 6.5 shall be paid to the Executive’s estate. The right to the foregoing compensation due under clauses (a) and (b) above is subject to the execution by the
beneficiary, or as applicable, the administrator of the Executive’s estate of the Company’s severance agreement which will operate as a release of all legally waivable claims against the Company. 

 

	 	6.6	 Effect of Termination.    The termination of this Agreement will terminate all obligations of the Executive to render services on
behalf of the Company from and after the Termination Date, provided that the Executive will maintain the confidentiality of all information acquired by the Executive during the term of Executive’s employment in accordance with paragraph 7 of
this Agreement and the Executive shall comply with all other post employment requirements including paragraphs 7, 8, 9, 10, 11, 12, 13 and 14. Except as otherwise provided in paragraphs 4.5 and 6 of this Agreement and payment of any PTO pay accrued
through the Termination Date, no accrued bonus, severance pay or other form of compensation will be payable by the Company to the Executive by reason of the termination of this Agreement. All keys, entry cards, credit cards, files, records,
financial information, furniture, furnishings, equipment, supplies and other items relating to the Company in the Executive’s possession will remain the property of the Company. The Executive will have the right to retain and remove all
personal property and effects which are owned by the Executive and located in the offices of the Company at a time determined by the Company. All such personal items will be removed from such offices no later than two (2) days after the
Termination Date, and the Company is hereby authorized to discard any items remaining and to reassign the Executive’s office space after such date. Prior to the Termination Date, the Executive will render such services to the Company as might
be reasonably required to provide for the orderly termination of the Executive’s employment. Notwithstanding the foregoing and without discharging any obligations to pay compensation to the Executive under this Agreement, after notice of the
Termination, the Company may request that the Executive not provide any other services to the Company and not enter the Company’s premises before or after the Termination Date. In the event that the Executive separates employment with the
Company, Executive hereby grants consent to notification by the Company to Executive’s new employer about Executive’s rights and obligations under this Agreement. Upon such

  
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 termination of employment, the Executive further agrees to acknowledge compliance
with this Agreement in a form reasonably provided by the Company. 
  

	7.	 Confidentiality.    The Executive recognizes that the nature of the Executive’s services are such that the Executive will have
access to information which constitutes trade secrets, is of a confidential nature, is of great value to the Company and/or is the foundation on which the business of the Company is predicated. The Executive also acknowledges that, during the course
of employment, the Executive may have personal contact and conduct business with the customers, suppliers and accounts of the Employer. The Executive agrees not to disclose to any person other than authorized Executives of the Company or the
Company’s legal counsel nor use for any purpose, other than the performance of this Agreement, any confidential information (“Confidential Information”). Confidential Information includes data or material (regardless of form) which
is: (a) a trade secret (a trade secret shall include any formula, pattern, device or compilation of information used by the Employer in its business); (b) provided, disclosed or delivered to Executive by the Company, any officer, director,
Executive, agent, attorney, accountant, consultant, or other person or entity employed by the Company in any capacity, any customer, borrower or business associate of the Company or any public authority having jurisdiction over the Company of any
business activity conducted by the Company; or (c) produced, developed, obtained or prepared by or on behalf of Executive or the Company (whether or not such information was developed in the performance of this Agreement) with respect to the
Company or any assets oil and gas prospects, business activities, officers, directors, Executives, borrowers or customers of the foregoing. The Executive acknowledges that Executive will obtain unique benefits from employment and the provisions
contained in this Agreement are reasonably necessary to protect the Employer’s legitimate business interests. On request by the Company, the Company will be entitled to the return of any Confidential Information in the possession of the
Executive. The Executive also agrees that the provisions of this paragraph 7 will survive the termination, expiration or cancellation of this Agreement for a period of three (3) years. The Executive will deliver to the Company all originals and
copies of the documents or materials containing Confidential Information. For purposes of paragraphs 7, 8, 9, 10 and 13 of this Agreement, the Company expressly includes any of the Company’s affiliated corporations, partnerships or entities.

  

	8.	 Non-Competition.    For a period of six (6) months after the Executive is no longer employed by the Company for any reason,
the Executive will not acquire, attempt to acquire or aid another in the acquisition or attempted acquisition of an interest in oil and gas assets, oil and gas production, oil and gas leases, mineral interests, oil and gas wells or other such oil
and gas exploration, development or production activities within any spacing unit in which the Company owns an oil and gas interest on the date of the resignation or termination of the Executive. 

  
 - 11 -

  

	9.	 Non-Solicitation.    The Executive agrees that during his/her employment hereunder, and for the one (1) year period
immediately following the separation of employment for any reason, the Executive shall not solicit or contact any established client or customer of the Company with a view to inducing or encouraging such established client or customer to discontinue
or curtail any business relationship with the Company. The Executive further agrees that the Executive will not request or advise any established clients, customers or suppliers of the Company to withdraw, curtail or cancel its business with the
Company. 

  

	10.	 Non-Solicitation of Employees.    The Executive covenants that during the term of employment and for the one (1) year period
immediately following the separation of employment for any reason, Executive will neither directly nor indirectly induce nor attempt to induce any Executive or Employee of the Company to terminate his or her employment to go to work for any other
Company. 

  

	11.	 Reasonableness.    The Company and Executive have attempted to specify a reasonable period of time and reasonable restrictions to
which this Agreement shall apply. The Company and Executive agree that if a court or administrative body should subsequently determine that the terms of this Agreement are greater than reasonably necessary to protect the Company’s interest, the
Company agrees to waive those terms which are found by a court or administrative body to be greater than reasonably necessary to protect the Company’s interest and to request that the court or administrative body reform this Agreement
specifying a reasonable period of time and such other reasonable restrictions as the court or administrative body deems necessary. 

  

	12.	 Equitable Relief.    The Executive acknowledges that the services to be rendered by Executive are of a special, unique, unusual,
extraordinary, and intellectual character, which gives them a peculiar value, and the loss of which cannot reasonably or adequately be compensated in damages in an action at law; and that a breach by the Executive of any of the provisions contained
in this Agreement will cause the Company irreparable injury and damage. The Executive further acknowledges that the Executive possesses unique skills, knowledge and ability and that any material breach of the provisions of this Agreement would be
extremely detrimental to the Company. By reason thereof, the Executive agrees that the Company shall be entitled, in addition to any other remedies it may have under this Agreement or otherwise, to injunctive and other equitable relief to prevent or
curtail any breach of this Agreement by him/her. 

  

	13.	 Proprietary Matters.    The Executive expressly understands and agrees that any and all improvements, inventions, discoveries,
processes, know-how or intellectual property that are generated or conceived by the Executive during the term of this Agreement, whether generated or conceived during the Executive’s regular working hours or otherwise, will be the sole and
exclusive property of the Company. Whenever requested by the Company (either during the term of this Agreement or thereafter), the Executive will assign or execute any and all applications, assignments and or other instruments and do all things
which the Company deems 

  
 - 12 -

	 	 
necessary or appropriate in order to permit the Company to: (a) assign and convey or otherwise make available to the Company the sole and exclusive right, title, and interest in and to said
improvements, inventions, discoveries, processes, know-how, applications, patents, copyrights, trade names or trademarks; or (b) apply for, obtain, maintain, enforce and defend patents, copyrights, trade names, or trademarks of the United
States or of foreign countries for said improvements, inventions, discoveries, processes or know-how. However, the improvements, inventions, discoveries, processes or know-how generated or conceived by the Executive and referred to above (except as
they may be included in the patents, copyrights or registered trade names or trademarks of the Company, or corporations, partnerships or other entities which may be affiliated with the Company) shall not be exclusive property of the Company at any
time after having been disclosed or revealed or have otherwise become available to the public or to a third party on a non-confidential basis other than by a breach of this Agreement, or after they have been independently developed or discussed
without a breach of this Agreement by a third party who has no obligation to the Company or its affiliates. The foregoing will not prohibit any activities which are expressly permitted by the last sentence of paragraph 3 of this Agreement during the
term of this Agreement. 

  

	14.	 Arbitration.    Any disputes, claims or controversy’s between the Employer and Executive including, but not limited to those
arising out of or related to this Agreement or out of the parties’ employment relationship, shall be settled by arbitration as provided herein. This agreement shall survive the termination or rescission of this Agreement. All arbitration shall
be in accordance with Rules of the American Arbitration Association, including discovery, and shall be undertaken pursuant to the Federal Arbitration Act. Arbitration will be held in Oklahoma City, Oklahoma unless the parties mutually agree to
another location. The decision of the arbitrator will be enforceable in any court of competent jurisdiction. The parties, however, agree that the Employer shall be entitled to obtain injunctive or other equitable relief to enforce the provisions of
this Agreement in a court of competent jurisdiction. The parties further agree that this arbitration provision is not only applicable to the Company but its affiliates, officers, directors, employees and related parties.

  

	15.	 Miscellaneous.    The parties further agree as follows: 

 

	 	15.1	 Time.    Time is of the essence of each provision of this Agreement. 

 

	 	15.2	 Notices.    Any notice, payment, demand or communication required or permitted to be given by any provision of this Agreement will
be in writing and will be deemed to have been given when delivered personally or by telefacsimile to the party designated to receive such notice, or on the date following the day sent by overnight courier, or on the third (3rd) business day after the same is sent by certified mail, postage and charges
prepaid, directed to the following address or to such other or additional addresses as any party might designate by written notice to the other party: 

  
 - 13 -

  

			
	To the Company:	 	 Chesapeake Energy Corporation

		 	Post Office Box 18496
		 	Oklahoma City, OK 73154-0496
		 	Attn: Aubrey K. McClendon
		
	To the Executive:	 	Domenic J. Dell’Osso, Jr.
		 	 [home address]

		 	

  

	 	15.3	 Assignment.    Neither this Agreement nor any of the parties’ rights or obligations hereunder can be transferred or assigned
without the prior written consent of the other parties to this Agreement; provided, however, the Company may assign this Agreement to any wholly owned affiliate or subsidiary of Chesapeake Energy Corporation without Executive’s consent as well
as to any purchaser of the Company. 

  

	 	15.4	 Construction.    If any provision of this Agreement or the application thereof to any person or circumstances is determined, to any
extent, to be invalid or unenforceable, the remainder of this Agreement, or the application of such provision to persons or circumstances other than those as to which the same is held invalid or unenforceable, will not be affected thereby, and each
term and provision of this Agreement will be valid and enforceable to the fullest extent permitted by law. Except as provided for in paragraph 14, this Agreement is intended to be interpreted, construed and enforced in accordance with the laws of
the State of Oklahoma. 

  

	 	15.5	 Entire Agreement.    This Agreement, any documents executed in connection with this Agreement, any documents specifically referred
to in this Agreement and the Employment Policies Manual constitute the entire agreement between the parties hereto with respect to the subject matter herein contained, and no modification hereof will be effective unless made by a supplemental
written agreement executed by all of the parties hereto. 

  

	 	15.6	 Binding Effect.    This Agreement will be binding on the parties and their respective successors, legal representatives and
permitted assigns. In the event of a merger, consolidation, combination, dissolution or liquidation of the Company, the performance of this Agreement will be assumed by any entity which succeeds to or is transferred the business of the Company as a
result thereof, and the Executive waives the consent requirement of paragraph 15.3 to effect such assumption. 

  

	 	15.7	 Supersession.    This Agreement supersedes and replaces any prior employment agreements including the Prior Agreement. On execution
of this Agreement by the Company and the Executive, the relationship between the Company and the Executive will be bound by the terms of this Agreement, any documents executed in connection with this Agreement, any documents specifically referred to
in this Agreement and the 

  
 - 14 -

	 	 
Employment Policies Manual. In the event of a conflict between the Employment Policies Manual and this Agreement, this Agreement will control in all respects. 

 

	 	15.8	 Third-Party Beneficiary.    The Company’s affiliated entities and partnerships are beneficiaries of all terms and provisions
of this Agreement and entitled to all rights hereunder. 

  

	 	15.9	 Section 409A.    This Agreement is intended to comply with Internal Revenue Code Section 409A and related U.S. Treasury
regulations or pronouncements (“Section 409A”) and any ambiguous provision will be construed in a manner that is compliant with or exempt from the application of Section 409A. Notwithstanding any provision to the contrary in this
Agreement, if Executive is deemed on his Termination Date to be a “specified employee” within the meaning of that term under Section 409A(a)(2)(B) of the Internal Revenue Code, then the payments and benefits under this Agreement that
are subject to Section 409A and paid by reason of a termination of employment shall be made or provided (subject to the last sentence hereof) on the later of (a) the payment date set forth in this Agreement or (b) the date that is the
earliest of (i) the expiration of the six-month period measured from the date of the Executive’s Termination of employment or (ii) the date of the Executive’s death (the “Delay Period”). Payments subject to the Delay
Period shall be paid to the Executive without interest for such delay in payment. 

  
 - 15 -

  
 IN WITNESS
WHEREOF, the undersigned have executed this Agreement effective the date first above written. 
  

			
	CHESAPEAKE ENERGY CORPORATION, an Oklahoma corporation.
		
	By:  	 	 /s/ Aubrey K. McClendon

		 	Aubrey K. McClendon, Chief Executive Officer
		 	(the “Company”)
		
	By:  	 	 /s/ Domenic J. Dell’Osso, Jr.

		 	Domenic J. Dell’Osso, Jr., Individually
		 	(the “Executive”)

  
 - 16 -

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