THIRDAMENDMENT TO SECOND LIEN CREDIT AGREEMENT AMONG REX ENERGYCORPORATION, as Borrower, THE GUARANTORS, KEYBANK NATIONAL ASSOCIATION, as Administrative Agent, AND THE LENDERSSIGNATORY HERETO DATED AS OFNOVEMBER 12, 2012 THIRD AMENDMENT TO SECONDLIEN CREDIT AGREEMENT

Exhibit 10.61

THIRD AMENDMENT

TO

SECOND LIEN CREDIT AGREEMENT

AMONG

REX ENERGY CORPORATION,

as Borrower,

THE GUARANTORS,

KEYBANK NATIONAL ASSOCIATION,

as Administrative Agent,

AND

THE LENDERS SIGNATORY HERETO

DATED AS OF NOVEMBER 12, 2012

THIRD AMENDMENT TO SECOND LIEN CREDIT AGREEMENT

This THIRD AMENDMENT TO SECOND LIEN CREDIT AGREEMENT (this “Third Amendment”) dated as of November 12, 2012 is among REX ENERGY CORPORATION, a corporation formed under the laws of the State of Delaware (the “Borrower”); each of the undersigned guarantors (the “Guarantors”, and together with the Borrower, the “Obligors”); KEYBANK NATIONAL ASSOCIATION, as administrative agent for the Lenders (in such capacity, together with its successors, the “Administrative Agent”); and the Lenders signatory hereto.

RECITALS

A. The Borrower, the Administrative Agent and the Lenders are parties to that certain Second Lien Credit Agreement dated as of December 22, 2011, as amended by that certain First Amendment to Second Lien Credit Agreement, dated as of May 7, 2012 and as amended by that certain Second Amendment to Credit Agreement dated as of September 4, 2012 (as so amended, the “Credit Agreement”), pursuant to which the Lenders have made certain term loans available to the Borrower.

B. The Guarantors are parties to that certain Guaranty and Second Lien Collateral Agreement dated as of December 22, 2011 made by each of the Grantors (as defined therein) in favor of the Administrative Agent (as heretofore amended, modified or supplemented, the “Guaranty”).

C. The Borrower, the Administrative Agent and the Lenders have agreed to amend Section 9.01(b) of the Credit Agreement as more fully set forth herein.

NOW, THEREFORE, in consideration of the premises and the mutual covenants herein contained, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

Section 1. Defined Terms. Each capitalized term which is defined in the Credit Agreement, but which is not defined in this Third Amendment, shall have the meaning ascribed such term in the Credit Agreement. Unless otherwise indicated, all article and section references in this Third Amendment refer to articles and sections of the Credit Agreement.

Section 2. Amendment to Credit Agreement.

2.1 Amendment to Section 9.01(b) of the Credit Agreement. Section 9.01(b) is hereby amended and restated in its entirety to read as follows:

(b) Ratio of Total Debt to EBITDAX. The Borrower will not, as of the last day of any fiscal quarter, permit its ratio of Total Debt as of such date to EBITDAX for the period ending on such day to be greater than 4.25 to 1.00.

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Section 3. Conditions Precedent. This Third Amendment shall become effective on the date on which each of the following conditions is satisfied (or waived in accordance with Section 12.02) (the “Third Amendment Effective Date”):

3.1 Third Amendment. The Administrative Agent shall have received multiple counterparts as requested of this Third Amendment from the Borrower, each other Obligor and the Majority Lenders.

3.2 Payment of Outstanding Invoices. Payment by the Borrower to the Administrative Agent of all fees and other amounts due and payable on or prior to the Third Amendment Effective Date, including, to the extent invoiced, reimbursement or payment of all reasonable out-of-pocket expenses required to be reimbursed or paid by the Borrower (including, but not limited to, the reasonable fees of Jones Day).

3.3 No Default. No Default or Event of Default shall be continuing as of the Third Amendment Effective Date.

Section 4. Representations and Warranties; Etc. Each Obligor hereby affirms: (a) that as of the date of execution and delivery of this Third Amendment, after giving effect to the terms of this Third Amendment, all of the representations and warranties contained in each Loan Document to which it is a party are true and correct in all material respects as though made on and as of the Third Amendment Effective Date (unless made as of a specific earlier date, in which case, was true as of such date); and (b) that after giving effect to this Third Amendment and to the transactions contemplated hereby, no Default exists or will exist under any Loan Document to which it is a party.

Section 5. Miscellaneous.

5.1 Confirmation. The provisions of the Credit Agreement (as amended by this Third Amendment) shall remain in full force and effect in accordance with its terms following the effectiveness of this Third Amendment.

5.2 Ratification and Affirmation of the Obligors. Each Obligor hereby expressly (a) acknowledges the terms of this Third Amendment; (b) ratifies and affirms its obligations under, and acknowledges, renews and extends its continued liability under, each Loan Document to which it is a party, and agrees that each Loan Document to which it is a party remains in full force and effect, as amended hereby; and (c) agrees that from and after the Third Amendment Effective Date each reference to the Credit Agreement in the Guaranty and the other Loan Documents shall be deemed to be a reference to the Credit Agreement, as amended by this Third Amendment.

5.3 Loan Document. This Third Amendment is a “Loan Document” as defined and described in the Credit Agreement and all of the terms and provisions of the Credit Agreement relating to Loan Documents shall apply hereto.

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5.4 Severability. Any provision of this Third Amendment which is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction.

5.5 Successors and Assigns. This Third Amendment shall be binding upon and inure to the benefit of the parties hereto and their respective successors and assigns.

5.6 Counterparts. This Third Amendment may be executed by one or more of the parties hereto in any number of separate counterparts, and all of such counterparts taken together shall be deemed to constitute one and the same instrument. Delivery of an executed counterpart of a signature page of this Third Amendment by telecopy, facsimile or email transmission shall be effective as delivery of a manually executed counterpart of this Third Amendment.

5.7 No Oral Agreement. THIS WRITTEN THIRD AMENDMENT, THE CREDIT AGREEMENT AND THE OTHER LOAN DOCUMENTS EXECUTED IN CONNECTION HEREWITH AND THEREWITH REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR UNWRITTEN ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

5.8 Governing Law. THIS THIRD AMENDMENT (INCLUDING, BUT NOT LIMITED TO, THE VALIDITY AND ENFORCEABILITY HEREOF) SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF TEXAS.

5.9 Release of Lenders. IN CONSIDERATION OF THIS THIRD AMENDMENT AND, SUBJECT TO THE CONDITIONS STATED HEREIN, THE BORROWER AND EACH OTHER OBLIGOR HEREBY RELEASES, ACQUITS, FOREVER DISCHARGES, AND COVENANTS NOT TO SUE, THE ADMINISTRATIVE AGENT AND EACH OF THE LENDERS, ALONG WITH ALL OF THEIR BENEFICIARIES, OFFICERS, DIRECTORS, AGENTS, EMPLOYEES, SERVANTS, ATTORNEYS AND REPRESENTATIVES, AS WELL AS THEIR RESPECTIVE HEIRS, EXECUTORS, LEGAL REPRESENTATIVES, ADMINISTRATORS, PREDECESSORS IN INTEREST, SUCCESSORS AND ASSIGNS (EACH INDIVIDUALLY, A “RELEASED PARTY” AND COLLECTIVELY, THE “RELEASED PARTIES”) FROM ANY AND ALL CLAIMS, DEMANDS, DEBTS, LIABILITIES, SUITS, OFFSETS AGAINST THE INDEBTEDNESS EVIDENCED BY THE LOAN DOCUMENTS AND ACTIONS, CAUSES OF ACTION OR CLAIMS FOR RELIEF OF WHATEVER KIND OR NATURE, WHETHER KNOWN OR UNKNOWN, SUSPECTED OR UNSUSPECTED BY BORROWER OR ANY OTHER OBLIGOR, WHICH BORROWER, ANY OTHER OBLIGOR, OR ANY SUBSIDIARY MAY HAVE OR WHICH MAY HEREAFTER ACCRUE RELATED TO ANY ACTIONS OR FACTS OCCURRING PRIOR TO THE THIRD AMENDMENT EFFECTIVE DATE AGAINST ANY RELEASED PARTY, FOR OR BY REASON OF ANY MATTER, CAUSE OR THING WHATSOEVER OCCURRING ON OR PRIOR TO THE THIRD AMENDMENT EFFECTIVE DATE, WHICH RELATE TO, IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY THE CREDIT AGREEMENT, ANY NOTE, ANY SECURITY INSTRUMENT, ANY OTHER LOAN DOCUMENT OR THE TRANSACTIONS EVIDENCED THEREBY, INCLUDING, WITHOUT LIMITATION, ANY DISBURSEMENTS UNDER THE CREDIT

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AGREEMENT, ANY NOTES, THE NEGOTIATION OF ANY OF THE CREDIT AGREEMENT, THE NOTES, OR THE OTHER LOAN DOCUMENTS, THE TERMS THEREOF, OR THE APPROVAL, ADMINISTRATION, ENFORCEMENT OR SERVICING THEREOF.

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IN WITNESS WHEREOF, the parties hereto have caused this Third Amendment to be duly executed effective as of the Third Amendment Effective Date.

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