Separation Agreement with Randy R. Wiese dated May 17, 2018

Separation Pursuant to Paragraph 10(d) of the Employment Agreement. The Company and the Executive agree to terminate the Executive’s employment under Paragraph 10(d) of the Employment Agreement.

Resignation; Continued Employment for Transition Services.  Executive will continue his employment as an Executive Vice President and Chief Financial Officer of the Company under and pursuant to the terms of the Employment Agreement until May 17, 2018 (the "Resignation Date"), and on such date Executive will cease to be an Executive Vice President and Chief Financial Officer of the Company.

Compensation in Respect of Continued Employment.

Compensation from Resignation Date to Retirement Date.   Executive's perquisites, and expense reimbursements under Paragraphs 6, 7, and 8 of the Employment Agreement from the Resignation Date through the Retirement Date will remain the same as those in effect on the date of this Agreement as a non-executive employee of the Company.  The Executive’s base salary from the Resignation Date through the Retirement Date will be adjusted to an annual rate equal to fifty percent (50%) of his base salary in effect as of the date of this Agreement.  Such salary and employee benefit programs will continue to be administered in accordance with the Company's regular payroll practices.

Annual Incentive Bonus Eliminated. The Executive will not be entitled to any amounts for his annual incentive bonus for 2018, as described under Paragraph 5 of the Employment Agreement.

Unused Vacation.  Any unused vacation earned pursuant to paragraph 8 of the Employment Agreement as of the Retirement date shall be forfeited by the Executive.

Equity Incentives. Effective on the Resignation Date, all of Executive's then existing unvested shares of Restricted Stock Awards (as shown in the table below) and all related accrued dividends (“Unvested RSAs”) from the Company (symbol: CSGS) will automatically vest in full and be earned and distributed to Executive in accordance with their terms.

Resignation from Stock Repurchase Committee. The Stock Repurchase Committee of the Company is comprised of certain members of the Company's senior management and is generally responsible for the governance and administration of the repurchase of shares of CSGS. This Agreement constitutes the immediate resignation of Executive from the Stock Repurchase Committee, and the Company hereby accepts such resignation.

Stock Ownership Guideline Termination. The Company has a policy in effect whereby the Executive is required to hold shares equivalent to one times his base salary. The Company agrees that such stock holding requirement will no longer apply to Executive after the Resignation Date. However, Executive shall continue to comply with all applicable

securities and other laws and Company policies with respect to dispositions of CSGS stock.

Electronic Devices. As of the Retirement Date, Executive shall be entitled to retain as his own property the Company-owned computer, iPad, and iPhone which he currently uses and all personal information contained on each such device, including Outlook Contacts and Calendar entries. The Company shall have its IT department remove all confidential or proprietary material from such devices, and the office of the CISO shall audit such devices for compliance.

Personal Effects. The Company shall arrange for the professional packing of Executive's personal effects in his office and the shipment of such items to his personal residence.

Death of Executive. If Executive dies prior to the date on which he becomes entitled to receive (and has received) all compensation and benefits which he is due under Paragraph 10(d) of the Employment Agreement, the Unvested RSAs, or this Agreement (without duplication), then the Company shall pay to his estate all such compensation when otherwise due, and all such equity and benefits when otherwise payable, as though Executive had not died.

Definition of "Cause". For purposes of this Agreement, "Cause" means only (i) Executive's confession or conviction of theft, fraud, embezzlement, or other crime involving dishonesty associated with the Company, (ii) Executive's certification of materially inaccurate financial or other information pertaining to the Company or any of the subsidiaries of the Company with actual knowledge on the part of Executive that such financial or other information was inaccurate, (iii) Executive's refusal or willful failure to cooperate with an investigation by a governmental agency pertaining to the financial or other business affairs of the Company or any of the subsidiaries of the Company unless such refusal or willful failure is based upon a written directive of the Board of Directors of CSGS or the written advice of counsel, (iv) a material breach by Executive of any of his fiduciary duties to the Company or any of the subsidiaries of the Company and, if such breach is curable, Executive's  failure to cure such  breach within ten  (10) days after Executive's receipt of a written notice from the Board of Directors of CSGS setting forth in reasonable detail the particulars of such breach, or (v) willful and material misconduct or fraud on the part of Executive in the performance of Executive's duties under this Agreement as determined in good faith by the Board of Directors of CSGS.

Continuing Obligations. The following provisions of the Employment Agreement are incorporated in this Agreement by this reference and will remain in effect from and after the Retirement Date as follows:

Nondisclosure. Paragraph 11 of the Employment Agreement (regarding the nondisclosure of confidential information, trade secrets, or proprietary data) will remain in effect in accordance with its provisions.

Non-Solicitation of Employees. Paragraph 18 of the Employment Agreement (regarding the non-solicitation of employees) will remain in effect in accordance with its provisions.

Post-Termination Noncompetition. Paragraph 19 of the Employment Agreement (regarding post-termination noncompetition) will remain in effect in accordance with its provisions.

Compensation, Benefits, and Other Payments Pursuant to Paragraph 10(d) of the Employment Agreement. The Company and Executive agree that, unless the employment of Executive is terminated by the Company for Cause prior the Resignation Date, on the Resignation Date Executive will become entitled to all of the compensation, benefits, and other payments which are provided pursuant to Paragraph 10(d) of the Employment Agreement and that such compensation, benefits, and other payments will be payable in accordance with the terms and upon the conditions set forth in Paragraph 10(d) of the Employment Agreement; for such purpose, the provisions of Paragraph 10(d) of the Employment Agreement are incorporated in this Paragraph 5 by this reference.

The amount payable to Executive pursuant to Paragraph 10(d)(ii) of the Employment Agreement is $2,580,441 (two million, five hundred eighty thousand, four hundred forty-one).  Considering the payment provisions in paragraph 10(d)(ii) of the Employment Agreement, and the Section 409A deferral requirements as outlined in paragraph 16(a) of this Agreement, the payment amounts and timing thereof are agreed to as follows:

The Resignation Date shall serve as the "Termination Date" for purposes of Paragraph 10(d) of the Employment Agreement, except for paragraph 10(d)(iv) for which the Retirement Date shall serve as the Termination Date.  Because Executive will be entitled to continue to participate in the Company benefit plans as a non-executive employee through the Retirement Date as noted in 2(a)(i) above, and then for one (1) year from the Termination date at the Company’s expense as specified in Paragraph 10(d)(iv) of the Employment Agreement.  For clarification and the avoidance of doubt, because the Executive’s Retirement Date in on July 1, 2018, the Executive will continue to receive benefit coverage as an employee through July 31, 2018 at the Company’s expense; thereafter, the Executive shall receive post-employment benefits at the Company’s expense until July 31, 2019.  Executive's COBRA rights shall not commence until the date on which Executive is no longer entitled to participate in such benefit plans (i.e., August 1, 2019).  

Nonassignability. Except for those rights that may accrue to Executive’s family or estate in the event of his death or disability, neither this Agreement nor any right or interest of Executive under this Agreement shall be subject, in any manner, to anticipation, alienation, sale, transfer, assignment, pledge, encumbrance, or charge, whether voluntary or involuntary, by operation of law or otherwise, and any attempt at such will be void. No compensation or benefit due Executive under this Agreement shall in any way be subject to the debts, contracts, liabilities, engagements or torts of Executive or subject to attachment or legal process against Executive.

Entire Agreement; Modification. Except as specifically set forth in Paragraph 4 and Paragraph 5 of this Agreement with respect to specified provisions of the Employment Agreement incorporated in this Agreement, this Agreement will supersede the Employment Agreement in its entirety as of the Resignation Date, and the Employment

Agreement will cease to have any further force or effect from and after the Resignation Date. This Agreement sets forth the entire agreement and understanding of the promises concerning the subject matter of this Agreement and supersedes all prior agreements, arrangements, and understandings relating to that subject matter including, without   limitation, the Employment Agreement (except as specifically set forth in the preceding sentence). No term or provision of this Agreement may be modified or extinguished, in whole or in part, except by a writing which is dated and signed by the patties to this Agreement. No representation, promise, or inducement has been made to or relied upon by or on behalf of the Company or Executive concerning the subject matter of this Agreement which is not set forth in this Agreement. In particular, Executive acknowledges and agrees that he is not entitled to receive from the Company any severance, incentive, or other compensation or payment related to his services to the Company or the termination of his employment by the Company, other than the compensation and payments specifically set forth in this Agreement).

Waiver. No term or condition of this Agreement shall be deemed to have been waived, nor shall there be an estoppel against the enforcement of any provision of this Agreement, except by a written instrument signed by the patty charged with such waiver or estoppel.

Notices. All notices or communications hereunder shall be in writing, addressed as follows:

Source of Payments. All cash payments provided for in this Agreement will be paid from the general funds of the Company. Executive's status with respect to amounts owed under this Agreement will be that of a general unsecured creditor of the Company.

Payment Acceleration upon Anticipated Change of Control. If the Company enters into any definitive agreement whereby all or substantially all of the assets or stock of the Company is to be acquired by an unrelated third patty, then the Company agrees that it will pay to Executive within ten (10) business days after the signing such definitive agreement by the parties thereto all payments to which Executive is entitled under this Agreement but which are then unpaid. For avoidance of doubt, if the payment required under this Section 11 would cause additional taxes and interest to be incurred under Section 409A, then the provisions of Section 16 will be applied to avoid such a result.

Federal Income Tax Withholding. The Company may withhold from any compensation or benefits payable under this Agreement all federal, state, city, or other taxes to the extent required pursuant to any law or governmental regulation or ruling.

Severability. If any provision of this Agreement is held to be invalid, illegal or unenforceable, in whole or part, then such invalidity will not affect any otherwise valid provision, and all other valid provisions will remain in full force and effect.

Counterparts. This Agreement may be executed in two or more counterparts, each of which will be deemed an original, and all of which together will constitute one document.

Titles. The titles and headings preceding the text of the paragraphs and subparagraphs of this Agreement have been inserted solely for convenience of reference and do not constitute a part of this Agreement or affect its meaning, interpretation or effect.

Section 409A Compliance.

Each payment under this Agreement, including each payment in a series of installment payments, is intended to be a separate payment for purposes of Treas. Reg. § 1.409A- 2(b), and is intended to be: (i) exempt from Section 409A of the Code, the regulations and other binding guidance promulgated thereunder ("Section 409A"), including, but not limited to, by compliance with the short-term deferral exemption as specified in Treas. Reg. § 1.409A-l(b)(4) and the involuntary separation pay exception within the meaning of Treas. Reg. § 1.409A- 1(b)(9)(iii), or (ii) in compliance with Section 409A, including, but not limited to, being paid pursuant to a fixed schedule or specified date pursuant to Treas. Reg. § 1.409A-3(a) and the provisions of this Agreement will be administered, interpreted and construed accordingly. Notwithstanding the foregoing provisions of this Agreement, if the payment of any compensation or benefits under this Agreement would be subject to additional taxes and interest under Section 409A because the timing of such payment is not delayed as provided in Section 409A(a)(2)(B)(i) of the Code, and Executive constitutes a specified employee within the meaning of Section 409A(a)(2)(B)(i) of the Code, then any such payments that Executive would otherwise be entitled to during the first six months following Executive's separation from service within the meaning of Section 409A(a)(2)(A)(i) of the Code shall be accumulated and paid on the date that is six months after Executive's separation from service (or if such payment date does not fall on a business day of the Company, the next following business day of the Company), or such earlier date upon which such amount can be paid under Section 409A without being subject to such additional taxes and interest.

All taxable reimbursements pursuant to this Agreement shall be made in accordance with Treas. Reg. § 1.409A-3(i)(l)(iv) such that the reimbursements will be deemed payable at a specified time or on a fixed schedule relative to a permissible payment event. Specifically, the amounts reimbursed under this

Agreement during Executive's taxable year may not affect the amounts reimbursed in any other taxable year (except that total reimbursements may be limited by a lifetime maximum under a group health plan), the reimbursement of an eligible expense shall be made on or before the last day of Executive's taxable year following the taxable year in which the expense was incurred, and the right to reimbursement is not subject to liquidation or exchange for another benefit.

Governing Law; Venue. This Agreement shall be construed and enforced in accordance with the laws of the State of Colorado. Any suit, action or other legal proceeding arising out of this Agreement shall be brought in the state or federal courts having jurisdiction in Denver, Colorado. Each of Executive and the Company consents to the jurisdiction of any such court in any such suit, action, or proceeding and waives any objection that he or it may have to the laying of venue of any such suit, action, or proceeding in any such court. If any dispute arises under this Agreement after a change in control of the Company has occurred, then the acquiring company shall pay the reasonable legal and associated fees of Executive reasonably incurred in connection with such dispute, regardless of the outcome of such dispute, unless it is determined that such dispute was initiated by Executive in bad faith and without a substantial basis in belief or fact.

Terms. The term "affiliate" means any subsidiary, any officer, director or employee of the Company or any subsidiary, and any former officer, director or employee of the Company or any subsidiary.

Successor Obligations. The Company will require any successor (whether direct or indirect, by purchase, merger, consolidation, or otherwise) to all or substantially all of the business and/or assets of the Company to assume expressly and agree to perform this Agreement in the same manner and to the same extent that the Company would be required to perform this Agreement if no such succession had taken place. As used in this Agreement, "Company" includes both the Company as defined above and any such successor to the Company's business and/or assets which assumes and agrees to perform this Agreement by operation of law or otherwise.

Reimbursement of Professional Advisor Fees. The Company shall pay Executive's legal counsel and 2018 financial/tax advisor/preparation fees, up to $8,000.00, incurred in connection with Executive's resignation and separation from the Company and the negotiation of this Agreement, promptly upon receipt of documentation of such fees.

Directors and Officers Insurance Coverage.

General. The Company hereby covenants and agrees that, so long as Executive shall continue to serve as an officer or director of the Company (or its subsidiaries or affiliates) and thereafter so long as Executive shall be subject to any possible proceeding by reason of the fact that Executive was an officer or director of the Company (or its subsidiaries or affiliates), the Company shall, subject to Section 2l(b) below, use reasonable efforts to obtain and maintain in full force and effect directors' and officers' liability insurance  ("D&O Insurance") in reasonable amounts from established and reputable insurers, and Executive shall be a covered party under such D&O Insurance to the maximum extent of the coverage available for any director or officer of the Company.

Commercial Reasonableness. Notwithstanding the foregoing, the Company shall have no obligation to obtain or maintain D&O Insurance if the Company determines in good faith that such insurance is not reasonably available, the premium costs for such insurance are disproportionate to the amount of coverage provided, or the coverage is reduced by exclusions so as to provide an insufficient benefit and D&O Insurance is in fact not provided for the other directors and officers of the Company.

Change in Control. In the event of a Change in Control pursuant to which the Company or any successor is obligated to provide D&O Insurance for a period of time following the effective date of the transaction or to purchase a D&O Insurance tail policy, Executive shall be a covered party under such D&O Insurance or tail policy to the maximum extent of the coverage available for any director or officer of the Company.

Waiver and Release. Promptly after the Retirement Date, Executive and the Company will enter into a mutual waiver and release of all claims against the other (and in respect of the Company, its officers, directors, agents, and employees), whether known or unknown, in a form mutually acceptable to the Company and Executive. Such release shall, on the part of Executive, contain provisions customarily included in a release executed by an employee in consideration of payments or benefits received by the employee in connection with the employee's termination of employment.