Document:

EX-10.9

 Exhibit 10.9 
 EMPLOYEE TRANSITION AGREEMENT 
 THIS EMPLOYEE TRANSITION AGREEMENT (this
“Agreement”), dated as of May 1, 2013 (the “Effective Date”), is made and entered into by and among CNP OGE GP LLC, a Delaware limited liability company (“GP”), CenterPoint
Energy, Inc., a Texas corporation (“CNP”), and OGE Energy Corp., an Oklahoma corporation (“OGE”). GP, CNP and OGE may sometimes be referred to in this Agreement individually as a
“Party” and collectively as the “Parties.” 
 WHEREAS, CNP indirectly owns 100%
of the outstanding capital stock of CenterPoint Energy Resources Corp., a Delaware corporation (“CERC”); 
 WHEREAS, CERC owns 100% of the outstanding limited liability company interests of CenterPoint Energy Field Services, LLC, a Delaware limited liability company (“CEFS”); 100% of the
outstanding limited liability company interests of CenterPoint Energy Gas Transmission Company, LLC, a Delaware limited liability company (“CEGT”); 100% of the outstanding limited liability company interests of CenterPoint
Energy – Mississippi River Transmission, LLC, a Delaware limited liability company (“MRT”); and 100% of the outstanding equity interests of the Other CNP Midstream Subsidiaries (the Other CNP Midstream Subsidiaries,
collectively with CEFS, CEGT, MRT and each of their respective subsidiaries, the “CNP Midstream Entities”); 
 WHEREAS, OGE owns 100% of the outstanding limited liability company interests of OGE Enogex Holdings LLC, a Delaware limited liability company (“OGE Holdings”); 

WHEREAS, OGE Holdings and Bronco Midstream Holdings, LLC, a Delaware limited liability company (“Bronco I”), and
Bronco Midstream Holdings II, LLC, a Delaware limited liability company (together with Bronco I, the “Bronco Group”) collectively own 100% of the outstanding limited liability company interests of Enogex Holdings LLC, a
Delaware limited liability company (“Enogex Holdings”); 
 WHEREAS, OGE and the Bronco Group have agreed
to cause Enogex Holdings to (i) form Enogex Holdings II LLC, a Delaware limited liability company (“Enogex”), as a wholly owned subsidiary of Enogex Holdings, (ii) contribute 100% of the outstanding equity interests
of Enogex LLC, a Delaware limited liability company, to Enogex, and (iii) redeem 100% of OGE Holdings’ membership interest in Enogex Holdings in exchange for 76.0% of the Economic Units (as defined in the Limited Liability Company
Agreement of Enogex) of Enogex and 100% of the Management Units (as defined in the Limited Liability Company Agreement of Enogex) of Enogex; 
 WHEREAS, pursuant to that certain Master Formation Agreement, dated as of March 14, 2013 (“Master Formation Agreement”), by and among CNP, OGE and the Bronco Group, CNP, OGE
and the Bronco Group have agreed through a series of transactions to contribute to CenterPoint Energy Field Services LP, a Delaware limited partnership (“LP”), the successor entity of CEFS, all of their respective ownership
interests in the CNP Midstream Entities and Enogex on the terms and conditions set forth in the Master Formation Agreement; 

 WHEREAS, GP, CNP and OGE desire to set forth their agreements with respect to employee
transition, employee benefit plans and other matters relating to the employees providing services to GP and LP during the period commencing on the closing date of the transactions contemplated in the Master Formation Agreement (“Closing
Date”) and ending on the date certain seconded employees of CNP and OGE become employees of LP or its Subsidiary or Subsidiaries; and 
 WHEREAS, immediately prior to the Closing Date, neither the CNP Midstream Entities nor Enogex employ any employees; 
 NOW, THEREFORE, in consideration of the premises set forth above and the respective representations, warranties, covenants, agreements and conditions contained in this Agreement, as well as other good and
valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereto agree as follows: 

ARTICLE I 

DEFINITIONS 
 Section 1.1. Definitions. In this Agreement, unless the context otherwise requires, the following terms shall have the following respective meanings: 

“Additional Employee” has the meaning set forth in Section 2.1(h). 

“Affiliate” means, with respect to any Person, any other Person that directly or indirectly through one or more
intermediaries controls, is controlled by or is under common control with, the Person in question. As used herein, the term “control” shall mean (a) the possession, direct or indirect, of the power to direct or cause the direction of
the management and policies of a Person, whether through ownership of voting securities, by contract or otherwise, (b) the ownership of 50% or more of the stock or other equity interests of a Person, the holders of which are generally entitled
to vote for the election of the board of directors or other governing body of such Person or (c) serving as general partner of such Person. 
 “Board of Directors” means the board of directors established pursuant to the GP LLC Agreement to manage the operations of LP. 

“CNP Benefit Plans” means the CNP Plans, as defined in the Master Formation Agreement, as in effect on the date
hereof and as they may thereafter be amended from time to time in accordance with the provisions of the Master Formation Agreement. 
 “CNP Midstream Employees” means Employees of CNP or a Subsidiary of CNP who perform services for the CNP Midstream Entities or their Subsidiaries. When the term “CNP Midstream
Employees” is used herein in reference to a specific date, it shall include the Employees of CNP or a Subsidiary of CNP who perform services for the CNP Midstream Entities or their Subsidiaries as of such date. 

“CNP Pension Plans” has the meaning set forth in Section 4.2(b). 

  
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 “CNP Retiree Medical Plan” has the meaning set forth in
Section 4.5(a). 
 “CNP Retirement Plan” has the meaning set forth in Section 4.2(b).

 “CNP Savings Plan” has the meaning set forth in Section 4.3(a). 

“CNP Seconded Employees” means the CNP Midstream Employees and any other employees of CNP or its Subsidiaries who
will be seconded to LP pursuant to the CNP Transitional Seconding Agreement. 
 “CNP Transitional Seconding
Agreement” means the CNP Transitional Seconding Agreement entered into by and between CNP and LP set forth in Exhibit 1 attached hereto. 
 “Employee” means an employee of the relevant entity who is, on the relevant day, either (a) actively at work or (b) not actively at work but not classified as a
terminated employee (including without limitation, on vacation, holiday, sick leave or other approved leave of absence with the right of reinstatement). Notwithstanding the foregoing, the term “Employee” shall not include any individual
who is on extended medical leave or long-term disability leave, unless such individual’s absence is designated as covered by the Family and Medical Leave Act. 
 “Employee Transfer Date” means a date after the Closing Date on which a Seconded Employee’s employment with CNP, OGE or one of their Subsidiaries, as applicable, ends and the
Seconded Employee becomes solely an Employee of LP or its Subsidiary. Subject to Section 2.1(i), no provision of this Agreement shall be construed as precluding or prohibiting different Employee Transfer Dates with respect to Seconded
Employees’ commencement of employment with LP or its Subsidiary. 
 “Enogex Employees” means
Employees of OGE or a Subsidiary of OGE who perform services for Enogex or its Subsidiaries. When the term “Enogex Employees” is used herein in reference to a specific date, it shall include the Employees of OGE or a Subsidiary of OGE who
perform services for Enogex or its Subsidiaries as of such date. 
 “Laws” means all statutes,
regulations, statutory rules, orders, judgments, decrees and terms and conditions of any grant of approval, permission, authority, permit or license of any court, Governmental Entity, statutory body or self-regulatory authority (including the New
York Stock Exchange). 
 “Liability” means any and all debts, liabilities, commitments and obligations,
whether or not fixed, contingent or absolute, matured or unmatured, liquidated or unliquidated, accrued or unaccrued, known or unknown, whether or not required by GAAP to be reflected in financial statements or disclosed in the notes thereto.

 “LP Entities” has the meaning set forth in Section 2.1(a). 

“Management Employee” means a Seconded Employee who is an officer at the level of (i) in the case of CNP,
senior vice president or above, and (ii) in the case of OGE, vice president or above, or, in either case, who directly reports to his or her employer’s chief executive officer. 

  
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 “Notice” has the meaning set forth in Section 6.1. 

“OGE Benefit Plans” means the Enogex Plans, as defined in the Master Formation Agreement, as in effect on the
date hereof and as they may thereafter be amended from time to time in accordance with the provisions of the Master Formation Agreement. 
 “OGE Pension Plans” has the meaning set forth in Section 4.2(a). 
 “OGE Retiree Life Insurance Program” has the meaning set forth in Section 4.5(b). 
 “OGE Retiree Medical Program” has the meaning set forth in Section 4.5(b). 
 “OGE Retirement Plan” has the meaning set forth in Section 4.2(a). 
 “OGE Savings Plan” has the meaning set forth in Section 4.3(a). 
 “OGE Seconded Employees” means the Enogex Employees and any other employees of OGE or its Subsidiaries who will be seconded to LP pursuant to the OGE Transitional Seconding
Agreement. 
 “OGE Transitional Seconding Agreement” means the OGE Transitional Seconding Agreement
entered into by and between OGE and LP set forth in Exhibit 2 attached hereto. 
 “Other CNP Midstream
Subsidiaries” means CenterPoint Energy – Illinois Gas Transmission Company, a Delaware corporation, CenterPoint Energy Pipeline Services, Inc., a Delaware corporation, and CenterPoint Energy Intrastate Holdings, LLC, a Delaware
limited liability company. 
 “Parent Equity Incentive Plans” means the equity-based incentive
compensation plans sponsored by CNP or OGE, as applicable. 
 “Parent Group Health Plans” has the
meaning set forth in Section 4.4(c). 
 “Parent Plans” means the CNP Benefit Plans and the OGE
Benefit Plans. 
 “Parent Welfare Plans” has the meaning set forth in Section 4.4(c). 

“Person” means an individual, partnership, joint venture, corporation, business trust, limited liability company,
trust, estate, incorporated or unincorporated organization and any other legal entity of any kind. 
 “Replacement
Employee” has the meaning set forth in Section 2.1(h). 
 “Seconded Employees” means
the CNP Seconded Employees and the OGE Seconded Employees. 
 “Secondment Period” means the period of
time beginning on the Closing Date and ending on the applicable Employee Transfer Date. 

  
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 “Selected Employees” has the meaning set forth in
Section 2.1(g). 
 “Severance Costs” means costs attributable to amounts payable under any
severance plan that may be established from time to time by CNP or OGE or their respective Subsidiaries for which any Seconded Employee may be eligible. 
 “Subsidiary” has the meaning set forth in Section 1.1 of the Master Formation Agreement. 
 “Termination Costs” means all liabilities incurred in connection with or arising out of the termination of employment (whether actual or constructive) with CNP or OGE or any of
their respective subsidiaries of any Seconded Employee, including liabilities relating to or arising out of any claim of discrimination or other illegality in connection with such termination but excluding the amount of any Severance Costs.

 “Transferred Employee” means each Seconded Employee who accepts LP’s or its Subsidiary’s
offer of employment and who becomes an Employee of LP or such Subsidiary. 
 “Transitional Seconding
Agreements” means the CNP Transitional Seconding Agreement and the OGE Transitional Seconding Agreement. 

“VEBA” has the meaning set forth in Section 4.5(a). 

“Welfare Benefit Plans” means “welfare plans” as defined in Section 3(1) of ERISA. 

“LP Group Health Plan” has the meaning set forth in Section 4.4(c). 

“LP Plans” has the meaning set forth in Section 4.1(b). 

“LP Pension Plan” has the meaning set forth in Section 4.2(c). 

“LP Retiree Medical Program” has the meaning set forth in Section 4.5(c). 

“LP Savings Plan” has the meaning set forth in Section 4.3(b). 

“LP Welfare Plans” has the meaning set forth in Section 4.4(c). 

Section 1.2. Capitalized Terms. Capitalized terms used but not defined in this Agreement have the respective meanings
ascribed to such terms under the Master Formation Agreement. The incorporation of such terms in the Master Formation Agreement into this Agreement shall survive any termination of the Master Formation Agreement. 

Section 1.3. Rules of Construction. The provisions of Section 1.2 of the Master Formation Agreement shall apply to this
Agreement as if fully set forth herein and shall survive any termination of such agreement. 

  
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 ARTICLE II 
 EMPLOYMENT TRANSFERS 
 Section 2.1. Identification and Transfer of
Employees. 
 (a) Between the Effective Date and the Employee Transfer Date, none of the CNP Midstream
Entities or Enogex, as the case may be, nor any of their respective Subsidiaries (collectively, the “LP Entities”), shall hire any employees nor shall CNP or OGE or any of their respective Subsidiaries transfer the employment
of any employee to the LP Entities or their Subsidiaries. For the avoidance of doubt, immediately prior to the Closing Date, the CNP Midstream Entities, Enogex and their respective Subsidiaries employ no employees. 

(b) Prior to the Effective Date, CNP has delivered to OGE a letter setting forth complete and accurate lists of the CNP
Seconded Employees employed by CNP or its Subsidiaries as of the Effective Date, including each such Employee’s current job title, work location, hire date, vacation balance, annual salary or hourly wages (as applicable) and annual bonus
opportunities as of the Effective Date. 
 (c) Prior to the Effective Date, OGE has delivered to CNP a letter
setting forth complete and accurate lists of the OGE Seconded Employees employed by OGE or its Subsidiaries as of the Effective Date, including each such Employee’s current job title, work location, hire date, vacation balance, annual salary or
hourly wages (as applicable) and annual bonus opportunities as of the Effective Date. 
 (d) The Employee lists
and information included in the letters described in Sections 2.1(b) and 2.1(c) shall be updated immediately prior to the Employee Transfer Date to include any additional Employees who are Seconded Employees who were hired after the Effective Date,
including any Employees hired pursuant to Section 2.1(h) (along with the information called for by Section 2.1(b) or 2.1(c), as applicable, with respect to such Employees) and to eliminate any Employees whose employment was terminated
after the Effective Date but prior to the Employee Transfer Date. 
 (e) Subject to Section 2.1(h),
Section 2.2 and Article III, on and after the Closing Date and for the duration of the Secondment Period, each Seconded Employee, unless such Seconded Employee’s employment with CNP and its Subsidiaries or OGE and its Subsidiaries, as the
case may be, is terminated, shall remain an Employee of CNP, OGE or one of their Subsidiaries other than the LP Entities, as the case may be, and shall be covered under the applicable Parent Plans for which, and to the extent, such Employee is
eligible. 
 (f) On the Closing Date, in connection with the provision of services by the Seconded Employees to
LP or its Subsidiaries during the Secondment Period, (i) CNP and LP shall enter into the CNP Transitional Seconding Agreement and (ii) OGE and LP shall enter into the OGE Transitional Seconding Agreement. 

  
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 (g) The Board of Directors or its designee shall select which, if any, of
the Seconded Employees will be offered employment with LP or its Subsidiaries as Management Employees and non-Management Employees as of the Employee Transfer Date (collectively, the “Selected Employees”) in accordance with
Section 2.1(i). 
 (h) After the Closing Date and prior to the applicable Employee Transfer Date, each of
CNP and OGE, in consultation with GP and LP, shall be permitted to hire Employees to fill any vacancies that have arisen or may arise due to terminations of employment among the Seconded Employees (“Replacement Employees”) or
as necessary to provide staffing for expansions or additional projects of LP (“Additional Employees”); provided, however, that (i) the circumstances and the terms upon which any such Replacement Employees and
Additional Employees are hired are consistent with their respective employer’s normal and customary business practices as in effect prior to the Closing Date, (ii) in the case of a hire to fill a vacancy, the employer of any such
Replacement Employee will be the same as the employer of the Employee whose termination resulted in the vacancy, and (iii) the employer of any Additional Employee will be determined in relation to the location of employment where such
Additional Employee is required, such that Additional Employees needed for such expansions or additional projects related to (A) the former CNP Midstream Entities will become Employees of CNP or one of its Subsidiaries (other than the CNP
Midstream Entities or their respective Subsidiaries) and (B) the former Enogex will become Employees of OGE or one of its Subsidiaries (other than Enogex or its Subsidiaries). All such Employees that are hired in accordance with the preceding
sentence will be designated as CNP Seconded Employees or OGE Seconded Employees, as applicable, and, if they remain employees on the Employee Transfer Date, will be included among the Employees who are eligible to receive offers of employment with
LP or a Subsidiary thereof in accordance with Sections 2.1(g) and 2.1(i). 
 (i) LP or a Subsidiary thereof shall
provide a written offer of employment to each Seconded Employee who has been designated as a Selected Employee, to become effective on the applicable Employee Transfer Date on terms to be determined by the Board of Directors or its designee,
in its discretion. The Board of Directors or its designee shall determine, in its discretion, base salary or wages and benefits for the Selected Employees (which may or may not be equal to each such Employee’s base salary or wages and benefits
in effect as of the date of the offer). All such transfers of employment shall take place on a date determined by mutual agreement of LP, CNP and OGE, but in any event not later than December 31, 2014, unless mutually agreed in writing by LP,
CNP and OGE prior to that date. Nothing in this Agreement shall prohibit the Board of Directors or its designee from hiring individuals who are not Seconded Employees as employees of LP and its Subsidiaries with hire dates effective on or after the
Employee Transfer Date. 
 (j) Each Selected Employee shall become a Transferred Employee on the applicable
Employee Transfer Date if he or she (i) accepts LP’s or its Subsidiary’s offer of employment under the terms and conditions provided in such offer and (ii) is actively at work or otherwise qualifies as an Employee of CNP, OGE or
one of their Subsidiaries, as applicable, on the applicable Employee Transfer Date. 

  
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 Section 2.2. Availability of Seconded Employees. CNP and OGE agree, on behalf of
themselves and their respective Subsidiaries, that from the date hereof through the Employee Transfer Date (except as contemplated by Section 2.1(a) and 2.1(i)): 

(a) they shall not, without first consulting with the other Parties and LP, transfer or permit the transfer of employment,
directly or indirectly, of, or terminate without cause or permit the termination without cause of, any Seconded Employees who are respectively employed by them or their Subsidiaries; and 

(b) consistent with past business practice, they shall maintain positive employee relations with and use reasonable
commercial efforts to retain all Seconded Employees who are respectively employed by them or their Subsidiaries. 
 provided, however,
that subject to Section 2.6 of the CNP Transitional Seconding Agreement or Section 2.6 of the OGE Transitional Seconding Agreement, as applicable, the final discretion for any employment termination shall rest with CNP or OGE or their
respective Subsidiaries, as applicable. 
 Section 2.3. Cooperation with Respect to Seconded Employees. CNP and OGE
shall assist LP in communicating with each of the Seconded Employees who is employed by CNP or OGE or their Subsidiaries, as applicable. Effective as of the Employee Transfer Date, CNP and OGE shall waive, and shall cause their respective
Subsidiaries to waive, as applicable, any covenants not to compete, confidentiality provisions or other similar restrictions that may be applicable to the Selected Employees but only to the extent such covenants, provisions or restrictions relate to
the present or contemplated business of LP and would prohibit such Employees from accepting employment with LP or its Subsidiaries or providing his or her services in such employment without violating any such covenants, provisions or restrictions.
Upon request and to the extent not prohibited by applicable Law, CNP and OGE and their respective Subsidiaries shall provide LP with copies of the payroll, benefits enrollment, service credit and such other records for the Transferred Employees as
may be necessary or appropriate to establish payroll and benefits records at LP for such Transferred Employees. CNP and OGE shall cooperate with regard to the design and implementation of any severance program that may be offered to their respective
Seconded Employees. 
 Section 2.4. No Restrictions on Changes. Nothing in this Agreement shall require or be
construed or interpreted as requiring LP and its Subsidiaries to continue the employment of any of their employees (including Transferred Employees). Nothing in this Agreement shall require or be construed or interpreted to prevent CNP, OGE, LP or
any of their respective Subsidiaries from changing the terms and conditions of employment (including compensation and benefits) of any of their employees (including Seconded Employees) before the Employee Transfer Date, except as specifically
provided in Section 2.2(c) of the Transitional Seconding Agreements or Sections 4.1(c), 4.3(b), 4.4(c) and 4.4(d) hereof. 

Section 2.5. Nonsolicitation. For the period beginning on the Effective Date and ending on the date that is two years after
the Closing Date, each of CNP, OGE and their respective Affiliates shall not, in any manner directly or indirectly or by assisting another Person, unless acting in accordance with the other Party’s prior written consent, solicit for employment

  
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or other similar relationship, or hire, any employee of an LP Entity or any Seconded Employee who is employed by the other Party or any of such other Party’s Affiliates, other than such
employee who (i) independently responded to a general solicitation for employment not directed at such employee or (ii) is a bona fide referral to such Party by a professional search firm. 

Section 2.6. Employee Liabilities and Indemnification. 

(a) LP shall be solely responsible for, and shall indemnify CNP, OGE and their Subsidiaries against and hold them harmless
from, and, to the extent applicable, reimburse CNP, OGE or their Subsidiaries for, any and all Termination Costs, Severance Costs and other Liabilities, if any, relating to or arising out of a Seconded Employee’s termination of employment from
CNP and its Subsidiaries or OGE and its Subsidiaries, as applicable, during and after the Seconding Period. 

(b) Subject to Sections 3.1 and 4.4 and the cost reimbursement provisions of the CNP Transitional Seconding Agreement, any
and all Liabilities arising out of or relating to (i) the employment by CNP or any of its Subsidiaries of any of their respective employees that are not specifically provided for in this Agreement and (ii) any Employee Benefit Plan that is
or has been sponsored, maintained, or contributed to by CNP or any ERISA Affiliate of CNP shall remain or become the responsibility of CNP and its Subsidiaries (other than CNP Midstream Entities and their respective Subsidiaries). Subject to
Sections 3.1 and 4.4 and the cost reimbursement provisions of the OGE Transitional Seconding Agreement, any and all Liabilities arising out of or relating to (i) the employment by OGE or any of its Subsidiaries of any of their respective
employees that are not specifically provided for in this Agreement and (ii) any Employee Benefit Plan that is or has been sponsored, maintained, or contributed to by OGE or any ERISA Affiliate of OGE, shall remain or become the responsibility
of OGE and its Subsidiaries (other than Enogex and its Subsidiaries). CNP, with respect to such Liabilities as shall remain or become the Liabilities of CNP and its Subsidiaries, and OGE, with respect to such Liabilities as shall remain or become
the Liabilities of OGE and its Subsidiaries, in each case as contemplated by this paragraph, shall indemnify LP and its Subsidiaries against and hold them harmless from any and all such Liabilities. 

(c) Any and all Liabilities arising out of or relating to the employment of any Transferred Employee by LP or any of its
Subsidiaries on or after the applicable Employee Transfer Date shall be the responsibility of LP and its Subsidiaries and LP shall indemnify each of CNP and OGE and their respective Subsidiaries against and hold them harmless from any and all such
Liabilities. 
 (d) Subject to Sections 3.1 and 4.4, but without limiting the generality of the foregoing, but
subject to the cost reimbursement provisions of the applicable Transitional Seconding Agreements, the Liabilities to be retained by any Person pursuant to the preceding paragraphs (b) and (c) of this Section 2.6 shall include
(a) the salaries and wages of the relevant employees along with any bonuses to which such employees may be entitled, (b) the costs of such employees’ participation in any Parent Plans or LP Plans, as applicable, (c) workers’
compensation coverage of such employees, (d) vacation and leave pay for such employees, (e) the employer’s portion of any health, life, 

  
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disability or other insurance or Welfare Benefit Plan coverages provided as a part of Parent Plans related to such employees, as applicable in which such employees participate, (f) all
employment taxes (including Social Security, Medicare and unemployment taxes) and tax withholdings related to such employees, (g) all payroll processing, payroll deduction, tax withholding and tax reporting services, employee benefit
administration, claims processing, personnel administration, and all such related human resources services with respect to such employees, and (h) except as otherwise specifically provided herein, Severance Costs and Termination Costs related
to such employees. 
 ARTICLE III 
 COMPENSATION 
 Section 3.1. Compensation Generally. On and
after the Employee Transfer Date, the Board of Directors or its designee shall determine the rate of base salary or wages of the Transferred Employees and may increase or decrease such salary or wages as it determines is appropriate in its sole
discretion. Nothing in this Agreement shall confer upon any Transferred Employee any right to continued employment with LP or its Subsidiaries, nor shall anything herein interfere with the right of LP or its Subsidiaries to relocate or terminate the
employment of any of the Transferred Employees at any time after the Employee Transfer Date. Subject to LP’s reimbursement obligations under the Transitional Seconding Agreements of this Agreement and the provisions of this Section 3.1 and
Section 4.4, CNP, OGE and their respective Subsidiaries, as applicable, shall retain all Liability and responsibility for wages, salary, overtime pay, bonuses, incentive pay, other cash compensation and employee benefits of their Seconded
Employees attributable to periods before the Employee Transfer Date. Effective as of the Employee Transfer Date, LP and its Subsidiaries shall, except as otherwise required by applicable Laws, assume and be solely responsible for (a) accrued
but unused vacation (including carry-over vacation) and, in addition, the sick leave entitlements, if applicable, of each of the Transferred Employees attributable to periods before the Employee Transfer Date and (b) all wages, salary, overtime
pay, bonuses, incentive pay, vacation pay, sick pay, other cash compensation and employee benefits of Transferred Employees attributable to the period beginning on the Employee Transfer Date, in each case subject to the terms of LP’s
compensation practices and benefit plans. From and after the Employee Transfer Date, LP shall, and shall cause its Subsidiaries to, comply with their obligations under Article IV for the provision of compensation and benefits for Transferred
Employees. 
 Section 3.2. Cash Incentive Compensation. Notwithstanding anything herein to the contrary, if the
applicable Employee Transfer Date occurs prior to the last day of a full calendar year, then CNP and OGE shall pay to the Transferred Employees all annual cash bonus and incentive payments earned by the Transferred Employees through the Employee
Transfer Date for such calendar year under the terms and conditions of the applicable Parent Plans. Such payments will be prorated based on the amount of time each Transferred Employee worked for CNP, OGE or their respective Subsidiaries, as the
case may be, during the such calendar year prior to the Employee Transfer Date and will be paid to the employees no later than March 15th of the calendar year immediately following the calendar year for which such amounts are earned. The cost
of such payments shall be allocated pursuant to the Transitional Seconding Agreements. 

  
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 Section 3.3. Equity Incentive Compensation. 

(a) With respect to any awards granted to Transferred Employees under the Parent Equity Incentive Plans prior to the
Employee Transfer Date, each of CNP and OGE shall take such actions as may be necessary to permit each Transferred Employee who has an outstanding award under such Parent Equity Incentive Plans as of the Employee Transfer Date to continue to earn
and/or vest in any such awards as are not fully earned and/or vested as of the Employee Transfer Date based on service to LP and its Subsidiaries. Further, with respect to any stock options granted to Transferred Employees under the Parent Equity
Incentive Plans prior to the Employee Transfer Date, CNP and OGE shall take such actions as may be necessary to permit each Transferred Employee to continue to exercise such stock options in accordance with the agreements governing such stock
options; provided, however, that for purposes of the foregoing, the transfers of employment described in Section 2.1(j) shall not be treated as terminations of employment for purposes of applying the provisions of such agreements
regarding exercises following a termination of employment, and such provisions shall be applied with all references to a termination of employment with CNP or OGE, and their respective affiliates, replaced with references to a termination of
employment with LP and its Affiliates. 
 (b) Between the Closing Date and the applicable Employee Transfer Date,
CNP and OGE may continue to grant Seconded Employees, including any newly-hired Employees pursuant to Section 2.1(h), equity-related compensation awards pursuant to the Parent Equity Incentive Plans that each of them sponsor at the time and in
accordance with customary business practices applicable to Employees of CNP and its Subsidiaries or OGE and its Subsidiaries, as applicable. Any such awards shall provide for vesting to continue after the Employee Transfer Date, based on service
with CNP and its Subsidiaries or OGE and its Subsidiaries, as applicable, and with LP and its Subsidiaries and, with respect to any such awards as are stock options, if the Employee accepts employment with LP, the transfer of such employment shall
not be considered a termination of employment that would trigger the beginning of any post-termination stock option exercise period. The cost of such compensation awards shall be allocated pursuant to the Transitional Seconding Agreements.

 (c) During the Secondment Period, CNP and OGE agree to consult with the Board of Directors (if requested by
the Board of Directors) concerning awards granted under short-term and long-term incentive plans by CNP and OGE to Seconded Employees during the Secondment Period. The Parties shall jointly determine the terms, conditions (including eligibility) and
other design features of short-term and long-term incentive plans and/or programs to be established by LP or its Subsidiary pursuant to which LP, in its discretion, may grant incentive awards to the Transferred Employees and future employees of LP
and its Subsidiaries on and after the Employee Transfer Date. Moreover, LP shall be permitted, in its discretion, to grant to the Seconded Employees incentive awards under such short-term and long-term incentive plans and/or programs as are adopted
by the Board of Directors during the Secondment Period. 

  
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 ARTICLE IV 
 EMPLOYEE BENEFITS 
 Section 4.1. Employee Benefits Generally.

 (a) Effective as of the Closing Date, neither LP nor any of its Subsidiaries shall be a participating employer
in any Parent Plan. Subject to LP’s reimbursement obligations under the Transitional Seconding Agreements, CNP and OGE shall remain solely responsible for all Liabilities with respect to the CNP Benefit Plans and the OGE Benefit Plans,
respectively, and LP and its Subsidiaries shall not assume any Parent Plan and shall have no obligations and shall assume no Liabilities with respect to the Parent Plans, in each case except as specifically provided in Section 3.1 and
Section 4.4 below. 
 (b) From and after the Employee Transfer Date, LP and its Subsidiaries shall provide
Transferred Employees with employee benefits, including without limitation, such health, welfare and retirement benefits as it may establish and maintain from time to time (the “LP Plans”). 

(c) LP shall grant to the Transferred Employees credit for their past service with CNP Midstream Entities, Enogex and
their respective Affiliates (or, in the case of Transferred Employees who are not CNP Midstream Employees or Enogex Employees, for their past service with CNP, OGE or their Affiliates, as applicable), to the extent such service was credited under a
similar plan, program or arrangement sponsored or maintained by CNP or OGE for the following: (i) vesting and eligibility purposes under any LP Plans in which they are or may become eligible to participate and (ii) determining the duration
and amount of their benefits under any sick pay, vacation or paid time off or severance policy maintained by LP in which they are or may become eligible to participate, subject to Section 4.7 regarding no duplication of benefits with respect to
the same period of service. 
 Section 4.2. Pension Benefits. 

(a) Effective as of the applicable Employee Transfer Date, OGE shall cause the Transferred Employees who, immediately
prior to the Employee Transfer Date, were OGE Seconded Employees to be one hundred percent (100%) vested in their accrued benefits under the OGE Energy Corp. Retirement Plan (the “OGE Retirement Plan”), and the OGE
Energy Corp. Restoration of Retirement Income Plan (collectively, the “OGE Pension Plans”). No assets or liabilities of the OGE Pension Plans will be transferred to LP or its Subsidiaries; rather, all such assets shall be
retained by the OGE Pension Plans and OGE, as applicable. As of the Closing Date, OGE has not terminated the OGE Retirement Plan and has sufficiently funded such plan so that (a) no Lien could arise pursuant to Section 430 of the Code with
respect to funding requirements under such plan and (b) the PBGC would have no basis upon which to institute involuntary termination proceedings pursuant to Section 4041(c) or 4042 of ERISA with respect to such plan. 

  
 12 

 (b) Effective as of the applicable Employee Transfer Date, CNP shall cause
the Transferred Employees who, immediately prior to the Employee Transfer Date, were CNP Seconded Employees to be one hundred percent (100%) vested in their accrued benefits under the CenterPoint Energy Retirement Plan (the “CNP
Retirement Plan”) and the CenterPoint Energy Benefits Restoration Plan (collectively, the “CNP Pension Plans”). No assets or liabilities of the CNP Pension Plans will be transferred to LP or its Subsidiaries;
rather, all such assets shall be retained by the CNP Pension Plan and CNP, as applicable. As of the Closing Date, CNP has not terminated the CNP Retirement Plan and has sufficiently funded such plan so that (a) no Lien could arise pursuant to
Section 430 of the Code with respect to funding requirements under such plan and (b) the PBGC would have no basis upon which to institute involuntary termination proceedings pursuant to Section 4041(c) or 4042 of ERISA with respect to
such plan. 
 (c) Prior to the end of the Secondment Period, the Parties shall jointly determine whether or not
to establish a new tax-qualified defined benefit pension plan, effective as of the Employee Transfer Date, to be maintained by LP or its Subsidiary in order to provide benefits for eligible Transferred Employees and future employees of LP and its
Subsidiaries (the “LP Pension Plan”). If the determination is made to establish the LP Pension Plan, then the Parties and LP shall jointly agree on the terms, conditions (including eligibility) and other design features of
the LP Pension Plan. 
 Section 4.3. Savings Plans. 

(a) Effective as of the Employee Transfer Date, CNP shall cause the Transferred Employees who, immediately prior to the
Employee Transfer Date, were CNP Seconded Employees to be one hundred percent (100%) vested in their account balances under the CenterPoint Energy Savings Plan (the “CNP Savings Plan”), and OGE shall cause the
Transferred Employees who, immediately prior to the Employee Transfer Date, were OGE Seconded Employees to be one hundred percent (100%) vested in their account balances under the OGE Energy Corp. Employees’ Stock Ownership and Retirement
Savings Plan (“OGE Savings Plan”). 
 (b) Prior to the end of the Secondment Period, the
Parties shall jointly determine whether or not to establish a new tax-qualified retirement savings plan, effective as of the Employee Transfer Date, to be maintained by LP or its Subsidiary in order to provide benefits for eligible Transferred
Employees and future employees of LP and its Subsidiaries (the “LP Savings Plan”). If the determination is made to establish the LP Savings Plan, then the Parties and LP shall jointly agree on the terms, conditions (including
eligibility) and other design features of the LP Savings Plan; provided, however, that subject to the terms of the LP Savings Plan, Transferred Employees may elect to roll over any portion of their distributable account balances under the CNP
Savings Plan and the OGE Savings Plan, and/or any portion of their accrued benefits under the CNP Retirement Plan and OGE Retirement Plan that is distributed as a lump sum to their respective accounts established under the LP Savings Plan. Moreover,
provided the LP Savings Plan has been established as of the Employee Transfer Date, as soon as practicable following the Employee Transfer Date, the LP Savings Plan shall permit the Transferred Employees to roll over their outstanding loan balances,
if any, 

  
 13 

 
under the CNP Savings Plan or OGE Savings Plan during the period specified by the LP Savings Plan (which shall not be less than 30 days following the Employee Transfer Date), subject to any
reasonable restrictions on loan balance transfers under the LP Savings Plan. 
 Section 4.4. Welfare Benefits.
Without limiting the generality of the above provisions, this Section 4.4 contains certain specific provisions regarding the provision of benefits under Welfare Benefit Plans, unemployment compensation benefits and workers compensation
benefits. 
 (a) Effective as of the Employee Transfer Date, LP shall cause the Transferred Employees to be
eligible to be covered by the Welfare Benefit Plans sponsored by LP or its Subsidiaries. 
 (b) Except as
specifically provided in this Section 4.4, and subject to LP’s reimbursement obligations under the Transitional Seconding Agreements: (i) CNP and its Subsidiaries shall be solely responsible for (A) claims of Transferred
Employees who, immediately prior to the Employee Transfer Date, were CNP Seconded Employees and their eligible beneficiaries and dependents for workers compensation, unemployment compensation and under Welfare Benefit Plans that are incurred before
the Employee Transfer Date, and (B) claims relating to COBRA coverage attributable to “qualifying events” occurring on or before the Employee Transfer Date with respect to any Transferred Employees who, immediately prior to the
Employee Transfer Date, were CNP Seconded Employees and their eligible beneficiaries and dependents; (ii) OGE and its Subsidiaries shall be solely responsible for (A) claims of Transferred Employees who, immediately prior to the Employee
Transfer Date, were OGE Seconded Employees, and their eligible beneficiaries and dependents for workers compensation, unemployment compensation and under Welfare Benefit Plans that are incurred before the Employee Transfer Date, and (B) claims
relating to COBRA coverage attributable to “qualifying events” occurring on or before the Employee Transfer Date with respect to any Transferred Employees who, immediately prior to the Employee Transfer Date, were OGE Seconded Employees
and their eligible beneficiaries and dependents; and (iii) LP and its Subsidiaries shall be solely responsible for (A) claims of Transferred Employees and their eligible beneficiaries and dependents for workers compensation and
unemployment compensation benefits and claims under Welfare Benefit Plans that are incurred on or after the Employee Transfer Date, and (B) claims relating to COBRA coverage attributable to “qualifying events” occurring after the
Employee Transfer Date with respect to Transferred Employees and their beneficiaries and dependents. A medical/dental claim shall be considered incurred on the date when the medical/dental services are rendered or medical/dental supplies are
provided, and not when the condition arose or when the course of treatment began. An unemployment compensation or workers compensation claim shall be considered incurred before the Employee Transfer Date if the occurrence giving rise to the claim
occurs before the Employee Transfer Date. 

  
 14 

 (c) Each Transferred Employee who is employed in an eligible job
classification shall be immediately eligible to participate, without any waiting time, in any and all Welfare Benefit Plans sponsored by LP and its Subsidiaries for the benefit of 

Transferred Employees (such plans, collectively, the “LP Welfare Plans”) to the extent coverage under such welfare
plan replaces coverage under a similar Parent Plan in which such Transferred Employee was previously eligible to participate (such plans, collectively, the “Parent Welfare Plans”). LP shall cause all pre-existing condition
exclusions and actively-at-work requirements of each LP Welfare Plan to be waived for Transferred Employees and their eligible beneficiaries and dependents, to the extent such exclusions and restrictions did not apply under the applicable Parent
Welfare Plan and, in respect of any such LP Welfare Plan that is an insured plan, to the extent reasonably possible under the applicable policy or program. In addition, for purposes of each LP Welfare Plan providing group medical, dental,
pharmaceutical and/or vision benefits (each a “LP Group Health Plan” and collectively, the “LP Group Health Plans”), if the Employee Transfer Date is a date other than December 31st of any
calendar year, LP and its Subsidiaries agree to provide Transferred Employees credit for purposes of any applicable deductible, co-payment and out-of-pocket requirements under the LP Group Health Plans for amounts paid under the corresponding Parent
Welfare Plans that provide group medical, dental, pharmaceutical and/or vision benefits (the “Parent Group Health Plans”) for the calendar year in which the Employee Transfer Date occurs as though such amounts had been paid
in accordance with the terms and conditions of the LP Group Health Plans, provided that, and only to the extent required by applicable Laws, each Transferred Employee (and his or her dependents and beneficiaries, as applicable) provides appropriate
written consent for disclosure by the Parent Group Health Plans to LP or the LP Group Health Plans upon their request. 
 (d) If the applicable Employee Transfer Date is a date other than December 31st of any calendar year, OGE and CNP shall transfer as of the applicable Employee Transfer Date to LP and its Subsidiaries
the excess, if any, of an amount equal to the aggregate of the accumulated contributions to their respective health and dependent care flexible spending account plans made by Transferred Employees (but not the Management Employees) for the plan year
in which the Employee Transfer Date occurs over the aggregate of the payments made from such accounts for such plan year to such employees as of the Employee Transfer Date, and such amounts shall be reflected in corresponding accounts set up on
behalf of the Transferred Employees in flexible spending account plans to be established by LP or its Subsidiaries. LP and its Subsidiaries shall cause their flexible spending account plans to honor and continue through the end of the calendar year
in which the Employee Transfer Date occurs the elections as in effect immediately prior to the Employee Transfer Date made by Transferred Employees under the applicable flexible spending account plans of OGE and CNP. Following the transfer, LP and
its Subsidiaries shall be responsible for such transferred excess amounts in their flexible spending account plans and all unpaid claims made by Transferred Employees for reimbursement under such plans in accordance with the terms of such plans.

  
 15 

 Section 4.5. Retiree Medical Benefits. 

(a) CNP has established and maintains on behalf of certain of its and its Subsidiaries’ retirees and employees who
may become eligible upon retirement, including, without limitation, certain of the CNP Midstream Employees, retiree medical 

benefits under the CenterPoint Energy Group Welfare Benefits Plan for Retirees (the “CNP Retiree Medical Plan”).
Except as provided below, the CNP Retiree Medical Plan is an unfunded obligation of CNP and, from and after the Closing Date, CNP will retain all Liabilities arising out of or relating to such programs with respect to Transferred Employees who
become entitled to benefits under the terms of such programs. With respect to the CNP Midstream Employees who are MRT employees at any time prior to the Closing Date, however, a trust fund was created to fund certain of the MRT employees’
retiree medical benefits under the CNP Retiree Medical Plan pursuant to that certain MRT Welfare Benefit Trust Agreement, by and between CERC and The Northern Trust Company, as trustee, dated as of August 31, 2001 (the
“VEBA”). From and after the Closing, to the extent consistent with applicable Laws, notwithstanding anything to the contrary herein, CERC or its Subsidiary (other than an LP Entity) shall retain all Liabilities and assets
relating to VEBA. 
 (b) OGE has established and maintains on behalf of certain of its and its Subsidiaries’
retirees and employees who may become eligible upon retirement, including, without limitation, certain of the Enogex Employees, a retiree medical program (the “OGE Retiree Medical Program”) and a retiree life insurance
program (the “OGE Retiree Life Insurance Program”). The OGE Retiree Medical Program and the OGE Retiree Life Insurance Program are both unfunded obligations of OGE and, from and after the Closing Date, OGE will retain all
Liabilities arising out of or relating to such programs with respect to Transferred Employees who become entitled to benefits under the terms of such programs. 
 (c) Prior to the end of the Secondment Period, the Parties shall jointly determine whether or not to establish a retiree medical program, effective as of the Employee Transfer Date, to be maintained by LP
or its Subsidiary for the benefit of eligible Transferred Employees and future employees of LP and its Subsidiaries (the “LP Retiree Medical Program”). If the determination is made to establish the LP Retiree Medical Program,
then the Parties and LP shall jointly agree on the terms, conditions (including eligibility) and other design features of the LP Retiree Medical Program. 
 Section 4.6. Nonqualified Deferred Compensation. With respect to any Parent Plan that is a nonqualified deferred compensation plan as defined in Section 409A of the Code, CNP, OGE and LP
will cooperate to prevent the transactions contemplated by the Master Formation Agreement and this Agreement from resulting in a violation of Section 409A of the Code with respect to any such plan. To the extent that the CNP Pension Plans or
OGE Pension Plans provide at any time for additional benefit accruals, service credits, cost-of-living increases, subsidies, notional investment credits or earnings or other benefits or enhancements for the CNP Seconded Employees or OGE Seconded
Employees, respectively, who become Transferred Employees, whether or not attributable to such employees’ compensation or service, or any other factor, from and after the Employee Transfer Date, CNP shall bear the full cost thereof for the CNP
Pension Plans and OGE shall bear the full cost thereof for the OGE Pension Plans, and neither LP, CNP with respect to the OGE Pension Plans, nor OGE with respect to the CNP Pension Plans shall have any Liability with respect thereto. 

  
 16 

 Section 4.7. No Duplication of Benefits. Nothing in this Agreement shall cause
duplicate benefits to be paid or provided to or with respect to a Seconded or Transferred Employee under any employee benefit policies, plans, arrangements, programs, practices, or agreements. References herein to a benefit with respect to a
Seconded or Transferred Employee shall include, where applicable, benefits with respect to any eligible dependents and beneficiaries of such Seconded or Transferred Employee under the same employee benefit policy, plan, arrangement, program,
practice or agreement. 
 ARTICLE V 
 TERMINATION 
 Section 5.1. Termination. This Agreement will be
effective on the Effective Date and will terminate on the last Employee Transfer Date. Notwithstanding the foregoing, either Party may terminate this Agreement upon notice to the other in the event that: (i) the parties mutually agree to do so;
(ii) the other party materially breaches the Agreement and its failure to cure such material breach within ninety (90) days following written notice of such breach; or (iii) the other party becomes insolvent. 

Section 5.2. Effect of Termination. Upon termination of this Agreement, all rights and obligations of the Parties under this
Agreement will terminate; provided, however, that termination will not affect or excuse the performance of either Party under any provision of this Agreement that by its terms survives termination (including, without limitation, obligations
to make payment for services provided or liabilities incurred prior to the effective date of such termination). Notwithstanding anything to the contrary herein, the following provisions of this Agreement will survive the termination of this
Agreement indefinitely: Sections 2.5, 2.6, 4.4, 4.5 and Article VI. 
 ARTICLE VI 

MISCELLANEOUS 
 Section 6.1. Notices. Any notice, request, instruction, correspondence or other document to be given hereunder by any party to another party (each, a “Notice”) shall be
in writing and delivered in person or by courier service requiring acknowledgment of receipt of delivery or mailed by U.S. registered or certified mail, postage prepaid and return receipt requested, or by telecopier, as follows, provided that copies
to be delivered below shall not be required for effective notice and shall not constitute notice: 
 If to CNP,
addressed to: 
 CenterPoint Energy, Inc. 

1111 Louisiana Street 
 Houston, TX 77002 
 Attention: Chief Financial Officer 

Fax: 713.207.9680 

  
 17 

 with a copy to: 

Baker Botts L.L.P. 
 910 Louisiana Street 
 Houston, Texas 77002 

Attention: J. David Kirkland 
      Gerald M. Spedale 
 Fax: 713.229.1522

 If to OGE, addressed to: 

OGE Enogex Holdings LLC 
 321 North Harvey 
 P.O. Box 321 

Oklahoma City, Oklahoma 73101-0321 

Attention: Chief Financial Officer 

Fax: 405.553.3760 
 with a copy to: 
 Jones Day 

717 Texas Avenue, Suite 3300 
 Houston, Texas 77002 
 Attention: James E. Vallee 

Fax: 832.239.3600 
 If to GP, addressed to: 
 CenterPoint Energy, Inc. 

1111 Louisiana Street 
 Houston, TX 77002 
 Attention: Chief Financial Officer 

Fax: 713.207.9680 
 with a copy to: 
 Baker Botts L.L.P. 

910 Louisiana Street 
 Houston, Texas 77002 
 Attention: J. David Kirkland 

     Gerald M. Spedale 

Fax: 713.229.1522 
 and 

  
 18 

 OGE Enogex Holdings LLC 

321 North Harvey 
 P.O. Box 321 
 Oklahoma City, Oklahoma 73101-0321 

Attention: Chief Financial Officer 

Fax: 405.553.3760 
 with a copy to: 
 Jones Day 

717 Texas Avenue, Suite 3300 
 Houston, Texas 77002 
 Attention: James E. Vallee 

Fax: 832.239.3600 
 Notice given by personal delivery, courier service or mail shall be effective upon actual receipt. Notice given by telecopier or facsimile shall be confirmed by appropriate answer back and shall be
effective upon actual receipt if received during the recipient’s normal business hours, or at the beginning of the recipient’s next Business Day after receipt if not received during the recipient’s normal business hours. All Notices
by telecopier or facsimile shall be confirmed promptly after transmission in writing by certified mail or personal delivery. Any party may change any address to which Notice is to be given to it by giving Notice as provided above of such change of
address. 
 Section 6.2. Governing Law; Jurisdiction; Waiver of Jury Trial. The provisions of Section 10.2
(Governing Law; Jurisdiction; Waiver of Jury Trial) of the Master Formation Agreement shall apply to this Agreement as if fully set forth herein and shall survive any termination of such agreement. 

Section 6.3. Entire Agreement; Amendments and Waivers. Except for the Master Formation Agreement, including all agreements
attached thereto as exhibits; the Transitional Seconding Agreements, this Agreement and the exhibits and schedules hereto constitute the entire agreement between and among the Parties hereto pertaining to the subject matter hereof and thereof and
supersede all prior agreements, understandings, negotiations and discussions, whether oral or written, of the Parties, and there are no warranties, representations or other agreements between or among the Parties in connection with the subject
matter hereof except as set forth specifically herein or contemplated hereby. 
 Section 6.4. No Third Party
Beneficiaries. Nothing contained in this Agreement shall entitle anyone other than OGE, CNP and LP, or their respective successors and assigns, to any claim, cause of action, remedy or right of any kind whatsoever. 

Section 6.5. Binding Effect and Assignment. This Agreement shall be binding upon and inure to the benefit of the Parties
hereto and their respective permitted successors and assigns. No Party hereto may assign, transfer, dispose of or otherwise alienate this Agreement or any of its rights, interests or obligations under this Agreement (whether by operation of law or
otherwise). Any attempted assignment, transfer, disposition or alienation in violation of this Agreement shall be null, void and ineffective. 

  
 19 

 Section 6.6. Severability. If any term or other provision of this Agreement is
invalid, illegal, or incapable of being enforced by any rule of applicable Law, or public policy, all other conditions and provisions of this Agreement shall nevertheless remain in full force and effect so long as the economic or legal substance of
the transactions contemplated by this Agreement are not affected in any manner materially adverse to any party hereto. Upon such determination that any term or other provision is invalid, illegal, or incapable of being enforced, the Parties hereto
shall negotiate in good faith to modify this Agreement so as to effect the original intent of the Parties hereto as closely as possible in a mutually acceptable manner in order that the transactions contemplated by this Agreement are consummated as
originally contemplated to the fullest extent possible. 
 Section 6.7. Execution. This Agreement may be executed in
multiple counterparts each of which shall be deemed an original and all of which shall constitute one instrument. 

[Remainder of Page Blank; Signature Page Follows] 

  
 20 

 IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be signed by their
respective officers hereunto duly authorized, all as of the date first written above. 
  

			
	CENTERPOINT ENERGY, INC.
		
	By:	 	 /s/ Gary L. Whitlock

	Name:	 	Gary L. Whitlock
	Title:	 	Executive Vice President and Chief Financial Officer

  

			
	OGE ENERGY CORP.
		
	By:	 	 /s/ Sean Trauschke

	Name:	 	Sean Trauschke
	Title:	 	Vice President and Chief Financial Officer

  

			
	CNP OGE GP LLC
		
	By:	 	 /s/ David M. McClanahan

	Name:	 	David M. McClanahan
	Title:	 	Interim Chairman

 EXHIBITS 
  

			
	Exhibit 1	  	CNP Transitional Seconding Agreement
	Exhibit 2	  	OGE Transitional Seconding AgreementEX-10.10

 Exhibit 10.10 
 CNP TRANSITIONAL SECONDING AGREEMENT 
 THIS CNP TRANSITIONAL SECONDING
AGREEMENT is made and is effective as of May 1, 2013 (the “Effective Date”), by and between CenterPoint Energy, Inc., a Texas corporation (“CNP”), and CenterPoint Energy Field Services LP, a
Delaware limited partnership (the “Company”). CNP and the Company may sometimes be referred to in this Agreement individually as a “Party” and collectively as the “Parties.”

 WHEREAS, pursuant to that certain Master Formation Agreement, dated as of March 14, 2013 (“Master Formation
Agreement”), by and among CNP, OGE Energy Corp., an Oklahoma corporation (“OGE”) Bronco Midstream Holdings, LLC, a Delaware limited liability company (“Bronco I”), and Bronco Midstream
Holdings II, LLC, a Delaware limited liability company (together with Bronco I, the “Bronco Group”), CNP, OGE and the Bronco Group have agreed through a series of transactions to contribute to the Company all of their
respective ownership interests in the CNP Midstream Entities (as defined in the Employee Transition Agreement) by CNP and in Enogex (as defined in the Employee Transition Agreement) by OGE and the Bronco Group, and CNP OGE GP LLC, a Delaware limited
liability company (“GP”), shall be the general partner of the Company; 
 WHEREAS, pursuant to the
Master Formation Agreement, CNP and OGE have agreed to second certain employees to the Company and its Subsidiaries (“Company Group”) to exclusively perform certain services for the Company Group until the Company Group has
its own employees; 
 WHEREAS, CNP and the Company desire to set forth their agreements with respect to the employees seconded
by CNP in accordance with the terms hereof; 
 NOW, THEREFORE, in consideration of the premises set forth above and the
respective representations, warranties, covenants, agreements and conditions contained in this Agreement, as well as other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereto agree as
follows: 
  

	1.	DEFINITIONS 

“Affiliate” has the meaning set forth in Article I of the Employee Transition Agreement.

 “Agreement” means this CNP Transitional Seconding Agreement, and any exhibits,
attachments, or schedules hereto, as the same may be amended from time to time. 
 “Additional
Employee” has the meaning set forth in Section 2.1(h) of the Employee Transition Agreement. 

“Board of Directors” has the meaning set forth in the Employee Transition Agreement. 

“Company Group” has the meaning set forth in the Preamble to this Agreement. 

 “Disclosing Party” has the meaning set forth in
paragraph 8.1. 
 “Effective Date” has the meaning set forth in the Preamble to this
Agreement. 
 “Employee Transition Agreement” means the Employee Transition Agreement by
and among CNP, OGE and GP, dated as of the Effective Date. 
 “Employment Costs” means
all costs other than Severance Costs or Termination Costs incurred or accrued by Member or related to an event that occurs during the term of this Agreement, without any mark-up or profit margin, with respect to any Seconded Employee or group of
Seconded Employees, for any period, including, but not limited to those costs specifically listed in Exhibit B attached to and made a part of this Agreement. 

“Employee Transfer Date” means the date on which a Seconded Employee’s employment with Member
ends and the Seconded Employee becomes an employee of the Company or a Subsidiary of the Company. 

“GP” has the meaning set forth in the Preamble to this Agreement. 

“Master Formation Agreement” has the meaning set forth in the Preamble to this Agreement.

 “Member” means CNP or, where the context requires, the Subsidiary of CNP that employs
the Seconded Employees. 
 “Member Equity Incentive Plans” means the equity-based
incentive compensation plans sponsored by CNP. 
 “OGE” has the meaning set forth in the
Preamble to this Agreement. 
 “Replacement Employee” has the meaning set forth in
Section 2.1(h) of the Employee Transition Agreement. 
 “Seconded Employee” means
the employees listed in Exhibit A attached to and made a part of this Agreement. Exhibit A may be revised and amended from time to time by the mutual agreement of the Parties. 

“Seconded Employee Cost Estimate” has the meaning set forth in paragraph 2.7 of this Agreement

 “Secondment Termination Date” means: (a) with respect to all Seconded Employees,
the effective date of the termination of this Agreement as specified in Section 10 below; or (b) with respect to an individual Seconded Employee, (i) the date the employment of the Seconded Employee with Member is terminated, or
(ii) provided that either the Company or Member gives ninety (90) days’ written notice to the other Parties of its intent to end such Seconded Employee’s seconding assignment to the Company Group, the effective date of
termination of such Seconded Employee’s seconding assignment. 

  
 2 

 “Severance Costs” has the meaning set forth in the
Employee Transition Agreement. 
 “Subsidiary” or “Subsidiaries”
has the meaning set forth in Article 1 of the Master Formation Agreement. 
 “Termination
Costs” has the meaning set forth in the Employee Transition Agreement or liabilities covered under paragraph 6.2 of this Agreement. 
 “Transferred Employee” means each Seconded Employee who accepts the Company’s or its Subsidiary’s offer of employment and who becomes an employee of the Company or such
Subsidiary. 
 “Work Product” has the meaning set forth in Section 9. 

Capitalized terms not otherwise defined in this Section 1 or elsewhere in this Agreement shall have the meaning ascribed to such term
in the Employee Transition Agreement. 
  

	2.	SECONDMENT OF SECONDED EMPLOYEES TO COMPANY GROUP 

  

	 	2.1	Member shall second to the Company Group the Seconded Employees to conduct business on behalf of the Company Group, beginning on the Effective Date or, if later, the
individual’s employment date (with the dates specified for each individual in Exhibit A, as amended from time to time) and continuing until the earlier of the Employee Transfer Date or the Secondment Termination Date in respect to
each Seconded Employee. During the period of secondment to the Company Group, the Seconded Employee shall work full-time for the Company Group and shall be expected to perform his or her work for the Company Group in its best interest. Member has
granted authority to the Company Group to exercise sufficient direction and control over the Seconded Employees assigned to the Company Group by Member as is necessary to conduct the Company Group’s business, discharge any of the Company
Group’s fiduciary responsibilities, or comply with any legal requirements applicable to the Company Group. The Seconded Employees shall be considered agents of the Company Group and not of Member while under such direction and control. The
Company Group agrees that it shall be responsible for any matters that arise in the course of performance of such work. Only Member has the right to hire and fire the Seconded Employees; provided, however, that the Company Group has the right
to refuse to have any or further services performed on its behalf by a Seconded Employee, in which case the Company Group shall be responsible for reimbursement of all Severance Costs and Termination Costs incurred by Member in respect of such
Seconded Employee. It is the intent of the Parties that the Seconded Employees remain Member’s employees during the period of secondment. All services provided by the Seconded Employees shall be provided pursuant to this Agreement for the
benefit of the Company Group. 

  
 3 

 Member will administer and/or provide the following employer services regarding the Seconded
Employees: paying payroll/wages; payroll processing services; assignment of employees to the Company Group; administering and providing benefits; administering required federal, state and local employee payments or withholdings from wages, as well
as required employer remittances of employment taxes to federal, state and local taxing authorities. The Seconded Employees assigned to the Company Group will be paid from Member’s payroll and accounts; and, any benefits to be provided and all
taxes will be paid under Member’s federal, state and local tax identification numbers. Member shall obtain workers’ compensation insurance for all covered Seconded Employees and shall keep such coverage in force and effect at all times for
all of the covered Seconded Employees. 
  

	 	2.2	During the term of this Agreement, the Seconded Employees seconded to the Company Group hereunder: 

 

	 	(a)	shall be employed by Member; 

  

	 	(b)	shall remain subject to the terms of employment with Member as Member shall establish from time to time (including without limitation Member’s code of business
conduct and policies concerning confidential and proprietary information) and Member shall manage such employment relationship, including direction and control over the hiring and firing of the Seconded Employees; 

 

	 	(c)	shall be eligible for participation in all Member benefit plans for which they would be eligible absent their secondment to the Company Group under this Agreement; and

  

	 	(d)	shall receive base salary and other compensation as Member shall determine consistent with past practice, subject to consultation with the Board of Directors.

  

	 	2.3	The normal working hours for the Seconded Employees shall be the normal working hours of the Company Group at the Company Group site or location to which the Seconded
Employees are assigned by the Company Group. 

  

	 	2.4	At the inception of the secondment period, Member and the Company have determined and set forth in Exhibit A each Seconded Employee’s current base
salary, which comprises only a portion of the total cost of a Seconded Employee. For expense planning purposes, by September 30 of each year and otherwise upon request of the Company, Member will provide a non-binding Seconded Employee cost
estimate for each Seconded Employee (the “Seconded Employee Cost Estimate”) for the next year. The sole purpose of the Seconded Employee Cost Estimate is to provide the Company with an estimated projection of future expenses
for inclusion in the Company’s annual budget. 

  

	 	2.5	Member and the Company Group shall each comply with all applicable national, state and local laws, regulations, and orders, including but not limited to national,
state, and local tax, social legislation, civil rights laws and any other employment-related laws, regulations and orders affecting, directly or indirectly, the Seconded Employees and each member of the Company Group shall be responsible for all
time-keeping records relating to hours worked. 

  
 4 

	 	2.6	Member shall have the right and responsibility to terminate the Seconded Employees, to evaluate each Seconded Employee’s performance for performance management
purposes, and, in consultation with the Company, to determine the amount of compensation and benefits to be provided to the Seconded Employees. In consultation with the Company, Member may hire Replacement Employees to replace terminated Seconded
Employees or add Additional Employees for the Company Group’s staffing or expansions or additional projects. Member will amend Exhibit A to show those Replacement Employees or Additional Employees hired and those Seconded Employee
terminated. During the period of secondment to the Company Group, the Seconded Employees shall have no authority to enter into contracts or otherwise engage in any business transactions on behalf of Member. The Company will provide the Seconded
Employees with (i) a suitable workplace which complies with all applicable safety and health standards, statutes, and ordinances, (ii) all necessary information, training, and safety equipment with respect to hazardous substances, and
(iii) adequate instruction, assistance, direction, and time to perform the services requested of them during the period of their secondment to the Company Group. 

 

	 	2.7	Prior to the Employee Transfer Date, the Board of Directors or its designee shall select which, if any, of the Seconded Employees will be offered employment with the
Company Group as of the Employee Transfer Date in accordance with Section 2.1(i) of the Employee Transition Agreement. 

  

	 	2.8	All Seconded Employees will abide by the Company Group’s policies applicable to the Seconded Employees. In addition, all Seconded Employees will abide by
Member’s code of business conduct, its policies concerning business travel and confidential and proprietary information, and other similar Member policies applicable to the Seconded Employees. Any discipline of the Seconded Employees under any
Company Group policies or practices will be handled by mutual agreement of Member and the Company. 

  

	 	2.9	During the term of this Agreement, Member shall add the members of the Company Group as an additional insured under its applicable insurance policies.

  

	3.	PAYMENT OF COSTS FOR SECONDED EMPLOYEE SERVICES 

  

	 	3.1	The Company shall be obligated to reimburse Member for all Employment Costs incurred by Member in connection with Seconded Employees, regardless of whether specifically
listed in Exhibit B. 

  

	 	3.2	With respect to the equity-related compensation awards described in Sections 3.3(a) and 3.3(b) of the Employee Transition Agreement, the Company will reimburse Member
for the amount of expense recorded on Member’s financial statements with respect to such awards and relating to the period following the Effective Date. 

  
 5 

	 	3.3	Member shall keep and maintain books and records in accordance with its standard accounting practices and procedures which books and records shall be sufficient to
enable an independent auditor to verify the accuracy of the costs billed by Member to the Company under the terms of this Agreement. 

  

	 	3.4	Except as otherwise provided in this Section 3, Member shall invoice the Company by the fifteenth (15th) workday of each calendar month for the Employment
Costs paid by Member during the prior month. Invoices shall be supported by appropriate documentation. For the protection of personal employee data, Employment Costs supporting details will be delivered only to the Company representative noted in
paragraph 12.2 below. 

  

	 	3.5	Invoices to the Company will be payable by wire transfer or other mutually agreed upon method of payment, within thirty (30) days from the date of invoice.

  

	 	3.6	If the Company has any questions or disagreement regarding the amount due under this Section 3, it shall provide Member with the nature and details of the dispute
within sixty (60) days after the date of invoice, after which time the Company will be deemed to have accepted all undisputed amounts included in such invoice, subject to the Company’s right to conduct an audit pursuant to Section 4.
The Parties shall then negotiate in good faith, each bringing forward supporting information. Such information is subject to audit and verification by the other Party. If the Parties resolve the dispute at this level, the resolution and agreed upon
action shall be documented for the Parties. 

 If the Parties cannot resolve the dispute, the matter shall be
escalated to the management of Member and the Company for review. If the dispute cannot be resolved to the satisfaction of the Parties at this level, the issue may be presented to senior officers of Member and the Board of Directors or its designee
for resolution. If the dispute involves an audit report or audit finding (which audit will be conducted and completed pursuant to, and in accordance with, Section 4), such audit will be made available to all members of the Board of Directors or
its designee. 
 The invoice amount not in dispute must be paid according to the terms of this Section 3, and only the
amount in dispute may be withheld subject to good business judgment and pending resolution of the dispute. 
  

	 	3.7	The Parties acknowledge that Member is a party to that certain Transition Services Agreement dated as of the Effective Date, pursuant to which Member provides certain
general and administrative services on behalf of the Company Group. Notwithstanding anything in this Agreement to the contrary, Member shall not be entitled to receive payment for the same services performed both hereunder and under such Transition
Services Agreement. 

  
 6 

	4.	AUDITS 

  

	 	4.1	The Company, through its authorized representatives, upon fifteen (15) days’ advance notice in writing to Member, shall have the right to conduct and complete
an audit of the books and records of Member relating to the financial and operating activities (including contractors and vendors supplying materials and/or services to Member) hereunder for any calendar year, for the sole purpose of determining the
accuracy of the Seconded Employee costs billed to the Company, within twelve (12) months following the end of such calendar year, utilizing a third-party independent auditor acceptable to Member, which acceptance shall not be unreasonably
withheld; provided, however, that the Company may not exercise such right more than once every six (6) months. The complete audit report from such audits shall be made available to Member. The audit expense incurred under this
Section 4 shall be borne by the Company. 

  

	 	4.2	The auditor shall be subject to reasonable conditions of confidentiality which shall be provided to the independent auditor by Member and which independent auditor will
be required to sign prior to beginning the audit. The Company’s independent auditor and Member’s internal auditors shall cooperate with each other to facilitate an accurate and efficient audit. 

 

	5.	DISCLAIMER BY MEMBER 

 There are
no representations or warranties made by Member hereunder, express or implied, at law or in equity, with respect to the subject matter hereof. By way of example and not by way of limitation, Member does not warrant the quality or competence of any
of the Seconded Employees or that the secondments of the Seconded Employees will permit the Company Group to achieve any specific or general results, nor does Member, except as provided in Section 6 hereof, accept any obligation or liability
whatsoever for the acts, omissions and/or other performance of the Seconded Employees, and in no event shall Member be liable to the Company for special, indirect, incidental, consequential or punitive damages in respect thereof. 

 

	6.	INDEMNITIES 

  

	 	6.1	 Except as provided in paragraph 6.2, the Company shall defend, indemnify and hold harmless Member, its Subsidiaries and Affiliates (other than the
Company Group), and their respective officers, directors, employees and agents, from, against and with respect to any and all costs, lawsuits, proceedings, demands, assessments, penalties, fines, administrative orders, claims, losses, expenses,
liabilities, obligations, and damages (including without limitation reasonable attorneys fees, costs and expenses incidental thereto) which in any way arise out of, result from, or relate to (i) the acts, omissions and/or other performance of
services (including without limitation any negligent or intentional acts or omissions) by the Seconded Employees during periods from and after the Effective Date, (ii) any negligent or intentional act or omission on the part of the Company or
any member of the Company Group or their respective officers, 

  
 7 

	 	
employees (including without limitation the Seconded Employees), or agents, (iii) any personal injury, death, or damage claim by, on behalf of, or related to a Seconded Employee to the
extent attributable to periods of time from and after the Effective Date, (iv) the Company’s or any member of the Company Group’s failure to comply with all applicable laws, including applicable labor and employment laws, regulations
or orders with respect to the Seconded Employees, or (v) any breach of this Agreement by the Company. 

  

	 	6.2	Member shall defend, indemnify and hold harmless the Company and the members of the Company Group and their respective officers, directors, employees and agents, from,
against and with respect to any and all costs, lawsuits, proceedings, demands, assessments, penalties, fines, administrative orders, claims, losses, expenses, liabilities, obligations, and damages (including without limitation reasonable attorneys
fees, costs and expenses incidental thereto) which in any way arise out of, result from, or relate to (i) any negligent or intentional act or omission on the part of Member, its officers or employees (excluding the Seconded Employees) or agents
which creates any violation of applicable labor or employment laws, (ii) any personal injury, death, or damage claim by, on behalf of, or related to a Seconded Employee to the extent attributable to periods of time prior to the Effective Date,
(iii) the Member’s or its Subsidiaries’ or Affiliates’ (other than the Group Members) failure to comply with all applicable laws, including applicable labor and employment laws, regulations or orders with respect to the Seconded
Employees, (iv) any claim, demand or cause of action which may be brought by any Seconded Employee or his or her heirs for personal injury to, or death of such Seconded Employee to the extent covered by Member’s statutorily required
workers compensation coverage or employer’s liability coverage applicable to such Seconded Employee and attributable to periods of time prior to the Employee Transfer Date, or (v) any breach of this Agreement by Member.

  

	 	6.3	Except as provided in paragraph 6.2, upon and after the Employee Transfer Date, the Company shall be solely responsible for (and shall defend, indemnify and hold
harmless Member, its Subsidiaries and Affiliates (other than the Company Group), and their respective officers, directors, employees and agents, from, against and with respect to) any and all costs, lawsuits, proceedings, demands, assessments,
penalties, fines, administrative orders, claims, losses, expenses, liabilities, obligations, and damages (including without limitation reasonable attorneys fees, costs and expenses incidental thereto) arising from or related to events occurring on
or after the Employee Transfer Date and that are related to the Seconded Employees who become employees of the Company Group. 

  

	 	6.4	 The Company and Member agree (i) to notify each other in writing of any asserted claim for indemnification pursuant to this Section 6 within
thirty (30) days of either discovery of the occurrence upon which the claim may be based or learning of such claim, whichever occurs first, and (ii) to permit Member or the Company, as the case may be, to defend the claim at the option of
the Party against whom the claim is asserted, with counsel acceptable to such Party, which 

  
 8 

	 	
consent will not be unreasonably refused. Except with respect to workers compensation and employer’s liability claims, no Party will pay or agree to pay any asserted claim under this
Agreement without prior written approval from the Party against whom the claim is asserted, which approval will not be unreasonably withheld. 

  

	 	6.5	In the event that a Party is obligated to indemnify and hold another Party harmless under this Article 6, the amount owing to the indemnified Party will be reduced by
the amount of any insurance claims made or proceeds received by such indemnified Party under the policies described in Section 2.9. 

  

	 	6.6	THE FOREGOING INDEMNITIES ARE INTENDED TO BE ENFORCEABLE AGAINST THE PARTIES IN ACCORDANCE WITH THE EXPRESS TERMS AND SCOPE THEREOF NOTWITHSTANDING ANY EXPRESS
NEGLIGENCE RULE OR ANY SIMILAR DIRECTIVE THAT WOULD PROHIBIT OR OTHERWISE LIMIT INDEMNITIES BECAUSE OF THE SOLE, CONCURRENT, ACTIVE OR PASSIVE NEGLIGENCE, STRICT LIABILITY OR FAULT OF ANY OF THE INDEMNIFIED PARTIES. 

 

	7.	FORCE MAJEURE 

 No Party shall be
liable to the other Party hereto for its failure or delay in performing its obligations hereunder (other than its obligations to pay money) due to Force Majeure. “Force Majeure” means any labor dispute, including but not
limited to strikes, work stoppages, or slowdowns, (whether or not beyond the reasonable control of the affected Party) and other circumstances reasonably beyond the control of the affected Party, including, without limitation, acts of God, fire,
flood, war, terrorism, accident, explosion, breakdowns or embargoes or other import or export restrictions, shortage of or inability to obtain energy, equipment, transportation, products or good faith compliance with applicable law or any request
(whether ultimately valid or invalid) made by any governmental authority. 
  

	8.	CONFIDENTIALITY 

  

	 	8.1	 Member and the Company each acknowledge that during the term of this Agreement, the Seconded Employees may receive, or otherwise acquire, information
that the Party disclosing such information (the “Disclosing Party”) considers proprietary and confidential, or which the Disclosing Party is obligated to keep in confidence pursuant to an agreement with a third party. Except
as otherwise provided to the contrary in any general confidentiality agreements between Member and the Company, Member agrees to instruct the Seconded Employees to maintain any and all such proprietary and confidential information transmitted to
them as a result of the performance of services for the Company by the Seconded Employees or being present on the Disclosing Party’s premises, in strict confidence. All business and technical information received, developed, observed, or
otherwise acquired by the Seconded Employees, as a result of performing services for the Company, or being present at the Disclosing Party’s 

  
 9 

	 	
premises, is presumed to be confidential. The obligations of confidence described in this paragraph 8.1 shall not apply to any information that (i) is known to the Seconded Employees prior
to the Seconded Employees’ acquiring such information, (ii) is or becomes known to the public through no fault of the Seconded Employees, (iii) the Seconded Employees are legally required by statute, subpoena, or other valid court
order, to disclose by a governmental agency or court having competent jurisdiction (provided that the Seconded Employee has given the Company written notice and the opportunities to contest such requirement). 

 

	 	8.2	Member and the Company will give the Seconded Employees an Employment Status and Information Non-Disclosure Notice substantially in the form of Exhibit C
attached to and made a part of this Agreement. 

  

	9.	WORK PRODUCT OWNERSHIP 

 Except
as otherwise provided to the contrary in any license or other similar agreements between Member and the Company, all rights of ownership applicable to any data, documents, information, inventions, and information-bearing media, generated, observed,
or discovered by the Seconded Employees, during the performance of services for the Company under this Agreement (the “Work Product”), shall belong solely to the Company, either by operation of the “work for hire”
doctrine, to the extent it is applicable, or by assignment from Member. In this regard, Member hereby assigns to the Company, its nominee, successor or assign, all rights, title and interest in and to such inventions, discoveries, improvements,
developments and other creative work, including both the United States and foreign rights that were conceived, discovered and/or made by a Seconded Employee solely or jointly with others while performing services for the Company or Company Group
relating to or connected with the business of the Company or its Subsidiaries. Member shall also execute, upon request by the Company, its nominee, successor, or assign any papers necessary or desirable to register a copyright, or apply for and
obtain a letter of patent from the United States or foreign countries, to maintain, enforce or defend any such copyrights or patents or other legal protection available to protect such inventions, discoveries, improvements, developments and all
other creative work, and to vest complete title to such patents, copyrights and other legal protection in the Company, its nominee, successor, or assign, including without limitation any papers relating to inferences, oppositions, conflicts,
re-issues, divisions, continuation-in-parts, or litigation relating to any such inventions, discoveries, improvements, developments, and all other creative work. Member shall retain no proprietary interest in such Work Product, or any patents,
copyrights, trade secrets or other intellectual property based on such Work Product. Under no circumstances shall such Work Product be conveyed, disclosed, released or exploited for the benefit of Member, its employees, or any third party without
the prior written consent of the Company. 

  
 10 

	10.	TERM AND TERMINATION 

  

	 	10.1	The term of this Agreement shall begin on the Effective Date and end on the last Employee Transfer Date of any Seconded Employee covered by this Agreement, unless
sooner terminated by either Party pursuant to paragraph 10.2. 

  

	 	10.2	The Company may terminate this Agreement upon ninety (90) days’ written notice to CNP. Either Party may terminate this Agreement immediately upon notice to
the other in the event that: (i) the Parties mutually agree to do so; (ii) the other Party materially breaches the Agreement and fails to cure such material breach within ninety (90) days following written notice of such breach; or
(iii) the other Party becomes insolvent. 

  

	 	10.3	If this Agreement is terminated, the Parties agree to promptly negotiate in good faith to determine the amount of Employment Costs for which Member has not received
reimbursement. Any amount owing to Member shall be paid within fourteen (14) days of the reconciliation of the Employment Costs as described above, or within thirty (30) days of the effective date of the termination, whichever is later.

  

	11.	RELATIONSHIP OF THE PARTIES 

  

	 	11.1	Nothing in this Agreement shall create or be deemed to create a partnership, joint venture, agency, or any other relationship between the parties or otherwise alter the
independent contractor relationship of the parties, except as expressly set forth in this Agreement. No prior course of dealing between Member and the Company shall be of any affect to modify in any respect either Party’s status under this
Agreement as an independent contractor. 

  

	 	11.2	For the period beginning on the Effective Date and ending on the date that is two years after the Effective Date, CNP and its Affiliates shall not, in any manner
directly or indirectly or by assisting another person, unless acting in accordance with the Company’s prior written consent, solicit for employment or other similar relationship, or hire, any Transferred Employee, other than such employee who
(i) independently responded to a general solicitation for employment not directed at such employee or (ii) is a bona fide referral to CNP or its Subsidiary or Affiliates by a professional search firm. 

 

	12.	MISCELLANEOUS 

  

	 	12.1	Neither Party may assign or otherwise transfer its rights or delegate or otherwise transfer its obligations hereunder without the prior written consent of the other
Party hereto, which consent shall not be unreasonably withheld. Any attempted assignment or transfer in violation hereof shall be void. 

  
 11 

	 	12.2	Any notice or request specifically provided for or permitted to be given under this Agreement must be in writing and may be delivered by hand delivery, mail, courier
service or facsimile, and shall be deemed effective as of the time of actual delivery thereof to the addressee (except that any notice by facsimile received after the close of business of the recipient shall be deemed received the next business
day). For purposes of notice, the address of the parties shall be as follows: 

 If to Member, addressed to:

 CenterPoint Energy, Inc. 
 1111 Louisiana St. 
 Houston, TX 77002 

Attention:     Chief Financial Officer 
 Fax: (713) 207-9680 
 with a copy to: 

Baker Botts L.L.P. 
 910 Louisiana St. 
 Houston, Texas 77002 

Attention:     J. David Kirkland 

 Gerald M. Spedale 
 Fax: (713) 229-1522 
 If to the Company, addressed to: 

CenterPoint Energy, Inc. 
 1111 Louisiana St. 
 Houston, TX 77002 

Attention:     Chief Financial Officer 
 Fax: (713) 207-9680 
 with a copy to: 

Baker Botts L.L.P. 
 910 Louisiana St. 
 Houston, Texas 77002 

Attention:     J. David Kirkland 

 Gerald M. Spedale 
 Fax: (713) 229-1522 
 and 

OGE Enogex Holdings LLC 
 321 North Harvey 
 P.O. Box 321 

Oklahoma City, Oklahoma 73101-0321 
 Attention: Sean Trauschke 
 Fax: (405) 553-3760 

  
 12 

 with a copy to: 
 Jones Day 
 717 Texas Avenue, Suite 3300 

Houston, Texas 77002 
 Attention: James E. Vallee 
 Fax: (832) 239-3600 

Each Party named above may change its address and that of its representative for notice by giving of notice thereof in the manner
hereinabove provided. 
  

	 	12.3	Seconded Employees are at-will employees. Nothing in this Agreement shall be construed as an employment contract or as creating any contractual obligation enforceable
by any individual Seconded Employee against any of Member, the Company, a member of the Company Group or any Affiliate of them, or prevent Member or the Company from making decisions regarding the continued employment of any individual by Member or
the Company during or after that Seconded Employee’s period of secondment to the Company under this Agreement. 

  

	 	12.4	No change in, modification of, addition to or waiver of any of the terms and conditions of this Agreement shall be effected by the acknowledgment or acceptance of
requests containing additional or different terms and conditions. No waiver of any of the provisions hereof shall be effective unless in writing and signed by the Party against whom asserted and no waiver made shall bind either Party to a waiver of
any succeeding breach of the same or any other provisions hereof. 

  

	 	12.5	The provisions of Section 10.2 (Governing Law; Jurisdiction; Waiver of Jury Trial) of the Master Formation Agreement shall apply to this Agreement as if fully set
forth herein and shall survive any termination or expiry of such agreement. 

  

	 	12.6	The headings and captions to the Sections and paragraphs of this Agreement have been inserted for convenience of reference only and shall not affect or be deemed to
affect the construction of this Agreement. 

  

	 	12.7	If any provision of this Agreement is held invalid, such invalidity shall not affect other provisions of this Agreement. To the extent reasonably possible, the parties
agree to promptly negotiate in good faith to cure any invalid provision consistent with the intent and spirit of this Agreement. 

  

	 	12.8	In the event of termination or expiry of this Agreement pursuant to paragraphs 10.1 or 10.2, Section 3 (Payment of Costs for Seconded Employees Services),
Section 6 (Indemnities), Section 8 (Confidentiality), and Section 9 (Work Product Ownership) shall survive. 

  

	 	12.9	This Agreement may be executed in multiple counterparts which shall be deemed an original and all of which shall constitute one instrument. 

  
 13 

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

									
	CENTERPOINT ENERGY FIELD SERVICES LP	 		 	CENTERPOINT ENERGY, INC.
	By:	 	CNP OGE GP LLC,	 		 		 	
		 	Its General Partner	 		 		 	
					
	By:	 	/s/ David M. McClanahan	 		 	By:	 	/s/ Gary L. Whitlock
	Name: David M. McClanahan	 		 	Name: Gary L. Whitlock
	Title: Interim Chairman	 		 	Title: Executive Vice President and Chief Financial Officer

 EXHIBIT B 
 EMPLOYMENT COSTS 
 Pursuant to paragraph 3.1 of the Agreement, the Employment Costs to be
reimbursed by the Company to Member shall include, but not be limited to, the following specified costs for each Seconded Employee: 
  

	 	•	 	 Compensation 

  

	 	•	 	 Base salary or wages 

  

	 	•	 	 Overtime, shift premium, and other similar payments 

  

	 	•	 	 All short and long-term incentive compensation, such as performance awards, incentive awards or sales commissions 

 

	 	•	 	 Cost of Living Allowance (COLA) 

  

	 	•	 	 Reimbursement of business expenses, including travel and entertainment, incurred in carrying out work under the direction of the Company.

  

	 	•	 	 Member’s share of federal, state and local taxes incurred with respect to each Seconded Employee. 

 

	 	•	 	 Member’s share of all employee retirement, welfare and fringe benefits costs, including but not limited to: 

 

	 	•	 	 Medical 

  

	 	•	 	 Dental 

  

	 	•	 	 Prescription drugs 

  

	 	•	 	 Vision 

  

	 	•	 	 Pension and non-qualified excess plans (SERPs) 

  

	 	•	 	 Post-retirement benefits affecting secondment period 

  

	 	•	 	 Employer matching and other contributions to savings plan programs such as 401(k) plans, non-qualified excess benefits plans (SERPs) and deferred
compensation plans 

  

	 	•	 	 Group travel insurance 

  

	 	•	 	 Group life insurance 

  

	 	•	 	 Long term disability insurance 

  

	 	•	 	 Long term care 

  

	 	•	 	 Employee assistance plan 

  

	 	•	 	 Educational reimbursement expense 

  

	 	•	 	 Any and all Seconded Employee relocation costs, both at the commencement and conclusion of assignment, including but not limited to:

  
 B-1

	 	•	 	 House Hunting Trip 

  

	 	•	 	 Travel, including the final move 

  

	 	•	 	 Loss on Home Sale 

  

	 	•	 	 Any Home Sale Bonus 

  

	 	•	 	 Guarantee House Purchase 

  

	 	•	 	 Any Lump Sum Payments 

  

	 	•	 	 Temporary Living Expenses 

  

	 	•	 	 Move Day Expenses 

  

	 	•	 	 Household goods movement and storage Costs 

  

	 	•	 	 Goods Shipment Cost to/from Member to the Company 

  

	 	•	 	 Home Sales Assistance 

  

	 	•	 	 Duplicate Housing Expenses 

  

	 	•	 	 All Cancellation Expenses 

  

	 	•	 	 Home Buying Expenses 

  

	 	•	 	 Rental/Leasing Assistance 

  

	 	•	 	 High Cost Assistance 

  

	 	•	 	 Career Assistance for Spouses 

  

	 	•	 	 Miscellaneous Relocation Moving Costs Allowance 

  

	 	•	 	 All direct costs of any claim, demand or cause of action which may be brought by any Seconded Employee or his or her heirs for personal injury to, or
death of such Seconded Employee during the term of this Agreement, or for any employment-related claims that relate to conduct during the term of this Agreement, including, but not limited to, costs under Member’s workers compensation insurance
coverage and which are (i) attributable to personal injury or death of such Seconded Employee during the term of this Agreement and (ii) are a direct obligation of Member or are subject to reimbursement by Member to any third party claim
administrator or insurer, including third party claim administrator claim management costs and other costs incurred in the management and defense of any such claim, demand, or cause of action. Costs, however, do not include costs which are fully
insured and which are not a direct obligation of Member or subject to reimbursement by Member. 

  

	 	•	 	 All other direct costs relating to the continuing employer-employee relationship, such as workers’ compensation and unemployment compensation
premiums, payments to employees or claims cost and any taxes imposed on Member by any governmental authority on account of the Seconded Employee. 

  
 B-2

 EXHIBIT C 
 Employment Status and Information Non-Disclosure Notice 
 As you know,
CenterPoint Energy, Inc. (“CNP”), OGE Energy Corp., an Oklahoma corporation (“OGE”), and affiliates of Arclight Capital Partners, LLC, entered into an agreement that resulted in the formation of
CenterPoint Energy Field Services LP (the “Company”). In connection with the agreement, CNP and OGE agreed to assign some of their employees and the employees of their respective affiliated companies (“Assigned
Employees”) to the Company for the purpose of assisting the Company in its operations and allowing the Company adequate time to develop, among other things, compensation and benefits for its own employees. This assignment is expected to
end not later than December 31, 2014, subject to extension by agreement of CNP and OGE. 
 Because you are among those
Assigned Employees whom CNP and OGE have provided to the Company to assist the Company during this transition period, it is important that you read this Employment Status and Information Non-Disclosure Notice (this “Notice”).
For purposes of simplicity, your current employer, whether it is CNP, OGE or one of their affiliated companies, will be referred to in this Notice as your “Member Company.” 

 

	1.	Employment Status. 

 In
its agreement with CNP and OGE, the Company agreed to give notice to the Assigned Employees concerning various aspects of their employment during the temporary period in which they are assigned by their Member Company to provide services for the
Company. Accordingly, please take notice of the following facts concerning your assignment: 
  

	 	•	 	 Your Member Company may assign you to provide services to the Company. While providing such services to the Company, you will remain an employee of
your Member Company. However, you will be given assignments by the Company and be subject to the instruction of the Company as to certain aspects of the details, means, and methods of performing such assignments. 

 

	 	•	 	 While assigned by your Member Company to provide services to the Company, you must comply with all the Company rules, policies, and related orders
and/or requests including without limitation those relating to alcohol, drugs, safety, security, smoking, controlled substances, and weapons. 

  

	 	•	 	 While assigned to the Company, you will remain on the payroll of your Member Company, and you will be covered by Workers’ Compensation insurance
maintained by your Member Company for the benefit of your Member Company and the Company. The responsibility, if any, of the Company for injuries or death will be limited to benefits available from your Member Company under applicable workers’
compensation laws. 

  

	 	•	 	 While you are assigned to provide services to the Company, you will participate in the benefits plans, programs, and policies of your Member Company,
to the extent that you are eligible, and you will not be eligible to participate in or be eligible for any benefits or rights under the Company’s benefit plans, programs, or policies, if any. 

  
 C-1

	2.	Information Non-Disclosure. 

 The agreements between the Company and CNP and OGE require that you be given notice of your obligations concerning the nondisclosure of certain information. From time to time, you may have access to the
Company’s confidential information, including information previously acquired by (i) CNP or its affiliated companies with respect to the CNP businesses and operations and research, development, and demonstration activities related
primarily thereto and (ii) OGE or its affiliated companies with respect to the OGE businesses and operations and research, development, and demonstration activities related primarily thereto. You will keep confidential and refrain from
disclosing such confidential information, without the Company’s prior written permission, to any party other than the Company’s employees, officers and representatives, or use such confidential information in a manner inconsistent with
your assignments. 
 Your obligations of non-disclosure and non-use contained herein, however, do not apply to:
(i) information which at the time of disclosure is, or subsequently becomes, published or generally known from a source other than you; (ii) information that you can demonstrate was in your possession prior to the date of your assignment
to the Company other than through your employment with your Member Company or any companies affiliated with your Member Company, and which was not acquired, directly or indirectly, from the Company, your Member Company, or any companies affiliated
with your Member Company; or (iii) information that you can demonstrate was lawfully received by you from a third party after the time of disclosure hereunder and which third party did not require you to hold in confidence. 

Information that is specific to a Company process or job assignment is not deemed to be in the public knowledge or literature or in your
possession merely because it is embraced in general disclosures in the public knowledge or literature. 
 Confidential
information includes business, technical, or financial information and other work product that is developed by you during your employment with your Member Company or its affiliated companies, and that the ownership and rights to use such information
are governed by the contractual relationships between CNP and the Company and OGE and the Company. 
  

	3.	At-Will Employment Status. 

Your Member Company and the Company are at-will employers. As such, your employment with your Member Company is on an employment-at-will
basis, and future employment, if any, with the Company, will be on an employment-at-will basis, which may be terminated by your employer at any time, and the Company may at any time discontinue your assignment to provide it services. Neither your
status as an Assigned Employee nor this Notice is a contract of employment, nor does either alter your employment-at-will status with your Member Company. 

  
 C-2

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