Document:

Employment Agreement

 Exhibit 10.70 
  
 EMPLOYMENT AGREEMENT 
  

This Employment Agreement is made and entered into on the 6th day of June, 2005, among CSG SYSTEMS INTERNATIONAL, INC. (“CSGS”), a Delaware
corporation, CSG SYSTEMS, INC. (“Systems”), a Delaware corporation, and ROBERT M. SCOTT (the “Executive”). CSGS and Systems collectively are referred to in this Employment Agreement as the “Companies”. 
  
 * * * 
  
 WHEREAS, Systems is a wholly-owned subsidiary of CSGS; and 
  
 WHEREAS, the Executive currently is employed by Systems and serves as an Executive Vice President of both of the Companies;
and 
  
 WHEREAS, the Companies desire to provide for the continued
employment of the Executive as an Executive Vice President; and 
  
 WHEREAS, the Executive desires to accept such continued employment upon the terms set forth in this agreement; 
  
 NOW, THEREFORE, in consideration of the foregoing recitals and the respective covenants and agreements of the parties contained in this document, the
Companies and the Executive agree as follows: 
  
 1.
Employment and Duties. Each of the Companies hereby employs the Executive as an Executive Vice President throughout the term of this agreement and agrees during the term of this agreement to cause the Executive from time to time to be elected
or appointed to such corporate office or position. The duties and responsibilities of the Executive shall include the duties and responsibilities of the Executive’s corporate office and position referred to in the preceding sentence which are
set forth in the respective bylaws of the Companies from time to time and such other duties and responsibilities consistent with the Executive’s corporate office and position referred to in the preceding sentence and this agreement which the
Board of Directors of CSGS (the “Board”), the Chief Executive Officer of CSGS, or the Chief Operating Officer of CSGS from time to time may assign to the Executive. If the Executive is elected or appointed as a director of CSGS or Systems
or as an officer or director of any of the respective subsidiaries of the Companies during the term of this agreement, then he also shall serve in such capacity or capacities but without additional compensation. 
  
 2. Term. The term of this agreement shall begin on the date of this
agreement and shall continue thereafter through December 31, 2006, unless the Executive’s employment under this agreement is sooner terminated in accordance with this agreement. After December 31, 2006, this agreement automatically and without
further action shall be extended on a month-to-month basis for successive periods of one (1) calendar month each unless, not later than thirty (30) days prior to the last day of any calendar month, either CSGS notifies the Executive and Systems in

 
writing or the Executive notifies the Companies in writing that such extension shall not occur on such last day of a particular calendar month, in which
latter case this agreement shall terminate upon the expiration of its then current term, unless the Executive’s employment under this agreement is sooner terminated in accordance with this agreement. References in this agreement to the
“current term” of this agreement shall include both the original term of this agreement and any automatic one-month extensions of such term which actually have occurred pursuant to this Paragraph 2. 
  
 3. Place of Employment. Regardless of the location of the executive
offices of the Companies during the term of this agreement, the Companies shall maintain a suitably staffed office for the Executive in the Omaha, Nebraska, metropolitan area during the term of this agreement; and the Executive will not be required
without his consent to relocate or transfer his executive office or principal residence from the immediate vicinity of the Omaha, Nebraska, metropolitan area. 
  

4. Base Salary. For all services to be rendered by the Executive pursuant to this agreement, the Companies agree to pay the Executive during the
term of this agreement a base salary (the “Base Salary”) at an annual rate of not less than Two Hundred Seventy-Five Thousand Dollars ($275,000). The Executive’s annual incentive bonus provided for in Paragraph 5 and all other
compensation and benefits to which the Executive is or may become entitled pursuant to this agreement or under any plans or programs of the Companies shall be in addition to the Base Salary. 
  
 5. Annual Incentive Bonus. The Board previously has established an
incentive bonus program for the Executive for 2005. Such incentive bonus program for 2005 has been reflected either in a written supplement to this agreement signed by the Companies and the Executive or in such other form as the Companies
customarily use for such purpose. The same procedure shall be followed for subsequent calendar years during the term of this agreement, so that an annual incentive bonus program for the Executive will be in effect throughout the term of this
agreement. The Executive and the Companies understand and acknowledge that, among other things, such incentive bonus program will involve achievement by the Companies or a particular division of the Companies of various financial objectives, which
may include but are not limited to revenues and earnings, and also may include achievement by the Companies or a particular division of the Companies of various non-financial objectives. Such incentive bonus program for each calendar year shall
provide the opportunity for the Executive to earn an incentive bonus of not less than sixty-five percent (65%) of his Base Salary for such calendar year if the agreed upon objectives are fully achieved. 
  
 6. Expenses. During the term of this agreement, the Executive shall be
entitled to prompt reimbursement by the Companies of all reasonable ordinary and necessary travel, entertainment, and other expenses incurred by the Executive (in accordance with the policies and procedures established by the Companies for their
respective senior executive officers) in the performance of the Executive’s duties and responsibilities under this agreement; provided, that the Executive shall properly account for such expenses in accordance with the policies and procedures
of the Companies, which may include but are not limited to itemized accountings. 
  

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 7. Other Benefits. During the term of this agreement, the Companies shall provide to the Executive
and his eligible dependents at the expense of the Companies individual or group medical, hospital, dental, and long-term disability insurance coverages and group life insurance coverage, in each case at least as favorable as those coverages which
are provided to other executive vice presidents of the Companies. During the term of this agreement, the Executive also shall be entitled to participate in such other benefit plans or programs which the Companies from time to time may make available
to their employees generally (except such programs, such as the 1996 Employee Stock Purchase Plan of CSGS, in which executive officers of CSGS are not eligible to participate because of securities law reasons). 
  
 8. Vacations and Holidays. During the term of this agreement, the
Executive shall be entitled to paid vacations and holidays in accordance with the policies of the Companies in effect from time to time for their respective senior executive officers, but in no event shall the Executive be entitled to less than four
(4) weeks of vacation during each calendar year. 
  
 9.
Full-Time Efforts and Other Activities. During the term of this agreement, to the best of his ability and using all of his skills, the Executive shall devote substantially all of his working time and efforts during the normal business hours
of the Companies to the business and affairs of the Companies and to the diligent and faithful performance of the duties and responsibilities assigned to him pursuant to this agreement, except for vacations, holidays, and sick days. However, the
Executive may devote a reasonable amount of his time to civic, community, or charitable activities, to service on the governing bodies or committees of trade associations or similar organizations of which either or both of the Companies are members,
and, with the prior approval of the Board or the Chief Executive Officer of CSGS, to service as a director of other corporations and to other types of activities not expressly mentioned in this paragraph, so long as the activities referred to in
this sentence do not materially interfere with the proper performance of the Executive’s duties and responsibilities under this agreement. The Executive also shall be free to manage and invest his assets in such manner as will not require any
substantial services by the Executive in the conduct of the businesses or affairs of the entities or in the management of the properties in which such investments are made, so long as such activities do not materially interfere with the proper
performance of the Executive’s duties and responsibilities under this agreement. At all times during the term of this agreement, the Executive shall comply with the requirements of the then current Code of Business Conduct and Ethics of CSGS.

  
 10. Termination of Employment. 
  
 (a) Termination Because of Death. The Executive’s employment by
the Companies under this agreement shall terminate upon his death. If the Executive’s employment under this agreement terminates because of his death, then the Executive’s estate or his beneficiaries (as the case may be) shall be entitled
to receive the following compensation and benefits from the Companies: 
  

	 	(i)	The Base Salary through the date of the Executive’s death; 

  

	 	(ii)	 A pro rata portion of the Executive’s annual incentive bonus for the calendar year in which his death occurs (computed as if the 

  

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Executive were employed by the Companies throughout such calendar year), based upon the number of days in such calendar year elapsed through the date of the
Executive’s death as a proportion of 365, to be paid at the same time that such incentive bonus would have been paid had the Executive’s death not occurred and the Executive had continued to be employed by the Companies;

  

	 	(iii)	Any other amounts earned, accrued, or owed to the Executive under this agreement but not paid as of the date of the Executive’s death; and 

  

	 	(iv)	Any other benefits payable by reason of the Executive’s death, or to which the Executive otherwise may be entitled, under any benefit plans or programs of the Companies in
effect on the date of the Executive’s death. 

  
 (b) Termination Because of Disability. If the Executive becomes incapable by reason of physical injury, disease, or mental illness of substantially performing his duties and responsibilities under this agreement for a continuous
period of six (6) months or more or for more than one hundred eighty (180) days in the aggregate (whether or not consecutive) during any 12-month period, then at any time after the elapse of such six-month period or such 180 days, as the case may
be, the Board may terminate the Executive’s employment by the Companies under this agreement. If the Executive’s employment under this agreement is terminated by the Board because of such disability on the part of the Executive, then the
Executive shall be entitled to receive the following compensation and benefits from the Companies: 
  

	 	(i)	The Base Salary through the effective date of such termination; 

  

	 	(ii)	A pro rata portion of the Executive’s annual incentive bonus for the calendar year in which such termination occurs (computed as if the Executive were employed by the Companies
throughout such calendar year), based upon the number of days in such calendar year elapsed through the effective date of such termination as a proportion of 365, to be paid at the same time that such incentive bonus would have been paid if such
termination had not occurred and the Executive had continued to be employed by the Companies; 

  

	 	(iii)	Any other amounts earned, accrued, or owed to the Executive under this agreement but not paid as of the effective date of such termination; 

  

	 	(iv)	 Continued participation in the following benefit plans or programs of the Companies which may be in effect from time to 

  

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time and in which the Executive was participating as of the effective date of such termination, to the extent that such continued participation by the
Executive is permitted under the terms and conditions of such plans (unless such continued participation is restricted or prohibited by applicable governmental regulations governing such plans), until the first to occur of the cessation of such
disability, the Executive’s death, the Executive’s attainment of age sixty-five (65), or (separately with respect to the termination of each benefit) the provision of a substantially equivalent benefit to the Executive by another employer
of the Executive: 

  

	 	(1)	Group medical and hospital insurance, 

  

	 	(2)	Group dental insurance, 

  

	 	(3)	Group life insurance, and 

  

	 	(4)	Group long-term disability insurance; 

  
 and 
  

	 	(v)	Any other benefits payable by reason of the Executive’s disability, or to which the Executive otherwise may be entitled, under any benefit plans or programs of the Companies in
effect on the effective date of such termination. 

  
 For purposes
of this subparagraph (b), decisions with respect to the Executive’s disability shall be made by the Board, using its reasonable good faith judgment; and, in making any such decision, the Board shall be entitled to rely upon the opinion of a
duly licensed and qualified physician selected by a majority of the members of the Board who are not employees of either of the Companies or any of their respective subsidiaries. 
  
 (c) Termination for Cause. The Board may terminate the Executive’s employment by the Companies under this
agreement for cause; however, for purposes of this agreement “cause” shall mean only (i) the Executive’s confession or conviction of theft, fraud, embezzlement, or other crime involving dishonesty, (ii) the Executive’s
certification of materially inaccurate financial or other information pertaining to the Companies (or either of them) or any of the respective subsidiaries of the Companies with actual knowledge of such inaccuracies on the part of the Executive,
(iii) the 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 Companies (or either of them) or any of the respective subsidiaries of the
Companies unless such refusal or willful failure is based upon a written direction of the Board or the written advice of counsel, (iv) the Executive’s excessive absenteeism (other than by reason of physical injury, disease, or mental illness)
without a reasonable justification and failure on the part of the Executive to cure such absenteeism within twenty (20) days after the Executive’s receipt of a written notice from the Board or the Chief Executive Officer of CSGS setting forth
the particulars of such absenteeism, (v) material violation by the Executive of the provisions of Paragraph 11, (vi) habitual and material negligence by the Executive in the performance of his duties and responsibilities under 

  

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or pursuant to this agreement and failure on the part of the Executive to cure such negligence within twenty (20) days after his receipt of a written notice
from the Board or the Chief Executive Officer of CSGS setting forth in reasonable detail the particulars of such negligence, (vii) material non-compliance by the Executive with his obligations under Paragraph 9 and failure to correct such
non-compliance within twenty (20) days after the Executive’s receipt of a written notice from the Board or the Chief Executive Officer of CSGS setting forth in reasonable detail the particulars of such non-compliance, (viii) material failure by
the Executive to comply with a lawful directive of the Board or the Chief Executive Officer of CSGS and failure to cure such non-compliance within twenty (20) days after the Executive’s receipt of a written notice from the Board or the Chief
Executive Officer of CSGS setting forth in reasonable detail the particulars of such non-compliance, (ix) a material breach by the Executive of any of his fiduciary duties to the Companies (or either of them) or any of the respective subsidiaries of
the Companies and, if such breach is curable, the Executive’s failure to cure such breach within twenty (20) days after the Executive’s receipt of a written notice from the Board or the Chief Executive Officer of CSGS setting forth in
reasonable detail the particulars of such breach, or (x) willful misconduct or fraud on the part of the Executive in the performance of the Executive’s duties under this agreement as determined in good faith by the Board. In no event shall the
results of operations of the Companies or any business judgment made in good faith by the Executive constitute an independent basis for termination for cause of the Executive’s employment under this agreement. Any termination of the
Executive’s employment for cause must be authorized by a majority vote of the Board taken not later than six (6) months after a majority of the members of the Board (other than the Executive) have actual knowledge of the occurrence of the event
or conduct constituting the cause for such termination. If the Executive’s employment under this agreement is terminated by the Board for cause, then the Executive shall be entitled to receive the following compensation and benefits from the
Companies: 
  

	 	(i)	The Base Salary through the effective date of such termination; 

  

	 	(ii)	Any other amounts earned, accrued, or owed to the Executive under this agreement but not paid as of the effective date of such termination; and 

  

	 	(iii)	Any other benefits payable to the Executive upon his termination for cause, or to which the Executive otherwise may be entitled, under any benefit plans or programs of the Companies
in effect on the effective date of such termination. 

  
 (d) Termination Without Cause Prior to a Change of Control. If, prior to the occurrence of a Change of Control, the Companies terminate the Executive’s employment under this agreement for any reason other than cause or the
Executive’s death or disability, then the Executive shall be entitled to receive the following compensation, benefits, and other payments from the Companies: 
  

	 	(i)	 The Base Salary through that date which is one (1) year after the effective date of such termination (the “Ending Date”), to be paid at the same times
that the Base Salary would have been 

  

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paid if such termination had not occurred; provided, that if the Executive commences employment with another employer, whether as an employee or as a
consultant, prior to the Ending Date (for purposes of this Paragraph 10, the “Other Employment”), then such payments of the Base Salary shall be reduced from time to time by the aggregate amount of salary, cash bonus, and consulting fees
received or receivable by the Executive from the Other Employment for services performed by him during the period from the commencement of the Other Employment through the Ending Date; 

  

	 	(ii)	A pro rata portion of the Executive’s annual incentive bonus for the calendar year in which such termination occurs (computed as if the Executive were employed by the Companies
throughout such calendar year), based upon the number of days in such calendar year elapsed through the effective date of such termination as a proportion of 365, to be paid at the same time that such incentive bonus would have been paid if such
termination had not occurred and the Executive had continued to be employed by the Companies; 

  

	 	(iii)	Any other amounts earned, accrued, or owed to the Executive under this agreement but not paid as of the effective date of such termination; 

  

	 	(iv)	Continued participation in the following benefit plans or programs of the Companies which may be in effect from time to time and in which the Executive was participating as of the
effective date of such termination, to the extent that such continued participation by the Executive is permitted under the terms and conditions of such plans (unless such continued participation is restricted or prohibited by applicable
governmental regulations governing such plans), until the first to occur of the Ending Date or (separately with respect to the termination of each benefit) the provision of a substantially equivalent benefit to the Executive by another employer of
the Executive: 

  

	 	(1)	Group medical and hospital insurance, 

  

	 	(2)	Group dental insurance, 

  

	 	(3)	Group life insurance, and 

  

	 	(4)	Group long-term disability insurance; 

  
 and 
  

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	 	(v)	Any other benefits payable to the Executive upon his termination without cause, or to which the Executive otherwise may be entitled, under any benefit plans or programs of the
Companies in effect on the effective date of such termination. 

  
 (e) Termination Without Cause After a Change of Control. If, after the occurrence of a Change of Control, the Companies or any Permitted Assignee (as defined in Paragraph 14) terminates the Executive’s
employment under this agreement for any reason other than cause or the Executive’s death or disability, then the Executive shall be entitled to receive from the Companies and the Permitted Assignee, if any (all of whom shall be jointly and
severally liable therefor), all of the compensation, benefits, and other payments from the Companies which are described and provided for in subparagraph (d) of this Paragraph 10 (as modified by this subparagraph (e)); provided, however, that (i)
for purposes of this subparagraph (e) the aggregate Base Salary payable under subparagraph (d)(i) (as modified by this subparagraph (e)) for all periods through the Ending Date shall be paid to the Executive in a lump sum without regard to Other
Employment not later than thirty (30) days after the effective date of such termination and (ii) the annual incentive bonus payable under subparagraph (d)(ii) (as modified by this subparagraph (e)) shall be 100% of the Executive’s annual
incentive bonus for the calendar year in which such termination occurs (computed as if the Executive were employed by the Companies throughout such calendar year) and shall not be prorated. 
  
 (f) Constructive Termination. If at any time during the term of this
agreement the Board, the Chief Executive Officer of CSGS, the Chief Operating Officer of CSGS, or a Permitted Assignee materially alters the duties and responsibilities of the Executive provided for in Paragraph 1 or assigns to the Executive duties
and responsibilities materially inappropriate to an executive vice president of the Companies without the Executive’s written consent, then, at the election of the Executive (such election to be made by written notice from the Executive to the
Board or the Permitted Assignee, as may be appropriate in the circumstances), (i) such action by the Board, the Chief Executive Officer of CSGS, the Chief Operating Officer of CSGS, or such Permitted Assignee shall constitute a constructive
termination of the Executive’s employment by the Companies for a reason other than cause (the “Constructive Termination”), (ii) the Executive thereupon may resign from his offices and positions with the Companies and shall not be
obligated to perform any further services of any kind to or for the Companies, and (iii) the Executive shall be entitled to receive from the Companies (and the Permitted Assignee, if applicable) at the applicable times all of the compensation,
benefits, and other payments described in subparagraph (d) or subparagraph (e) of this Paragraph 10 (whichever may be applicable), as if the effective date of the Executive’s resignation were the effective date of his termination of employment
for purposes of determining such compensation, benefits, and other payments. Notwithstanding the foregoing provisions of this subparagraph (f), before exercising any of his rights pursuant to the preceding sentence, the Executive shall give written
notice to the Chief Executive Officer of CSGS setting forth the Executive’s intent to exercise such rights and specifying the Constructive Termination which the Executive claims to be the basis for such intended exercise; and the Companies
shall have twenty (20) days after the Chief Executive Officer has received such notice to take such actions, if any, as the Companies may deem appropriate to eliminate such claimed Constructive Termination (without thereby admitting that a
Constructive Termination had occurred). If the Companies so act to eliminate such claimed Constructive Termination, then the Executive shall not have any rights under this subparagraph (f) with respect to such claimed Constructive Termination.

  

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 (g) Voluntary Resignation. If the Executive voluntarily resigns as an employee of the Companies
and thereby voluntarily terminates his employment under this agreement and if none of subparagraphs (a) through (f) of this Paragraph 10 is applicable to such termination, then the Executive shall be entitled to receive only the following
compensation, benefits, and other payments from the Companies: 
  

	 	(i)	The Base Salary through the effective date of such voluntary resignation; 

  

	 	(ii)	Any other amounts earned, accrued, or owed to the Executive under this agreement but not paid as of the effective date of such voluntary resignation; 

  

	 	(iii)	If (and only if) the Executive’s voluntary resignation is effective on December 31 of a particular calendar year, the Executive’s annual incentive bonus (if any) for such
calendar year, to be paid in accordance with the regular schedule for its payment; and 

  

	 	(iv)	Any other benefits payable to the Executive upon his voluntary resignation, or to which the Executive otherwise may be entitled, under any benefit plans or programs of the Companies
in effect on the effective date of such voluntary resignation. 

  
 The Executive understands and agrees that if this subparagraph (g) is applicable to the termination of the Executive’s employment with the Companies, then, unless his voluntary resignation is effective on December 31 of a particular
calendar year, the Executive will not be entitled to any annual incentive bonus for the calendar year in which his voluntary resignation becomes effective. 
  
 (h) Liquidated Damages. The Executive agrees to accept the compensation, benefits, and other payments provided for in subparagraph (d),
subparagraph (e), or subparagraph (f) of this Paragraph 10, as the case may be, as full and complete liquidated damages for any breach of this agreement resulting from the actual or constructive termination by the Companies of the Executive’s
employment under this agreement for a reason other than cause or the Executive’s death or disability; and the Executive shall not have and hereby waives and relinquishes any other rights or claims in respect of such breach. 
  
 (i) Notice of Other Employment and of Benefits. The Executive promptly
shall notify the Companies in writing of (i) his acceptance of the Other Employment referred to in subparagraph (d) of this Paragraph 10, (ii) the effective date of such Other Employment, and (iii) the amount of salary, cash bonus, and consulting
fees which the Executive receives or is entitled to receive from the Other Employment for services performed by him during the period from the 

  

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commencement of the Other Employment through the Ending Date. Whenever relevant for purposes of this Paragraph 10, the Executive also promptly shall notify
the Companies of his receipt from another employer of any benefits of the types referred to in subparagraphs (b)(iv) and (d)(iv) of this Paragraph 10. Such information shall be updated by the Executive whenever necessary to keep the Companies
informed on a current basis. 
  
 (j) Modification of Benefit
Plans or Programs. Nothing contained in this Paragraph 10 shall obligate the Companies to institute, maintain, or refrain from changing, amending, or discontinuing any benefit plan or program referred to in subparagraph (b)(iv) or (d)(iv) of
this Paragraph 10 so long as such actions are similarly applicable to senior executives of the Companies generally. 
  
 (k) Rights of Estate. If the Executive dies prior to his receipt of all of the cash payments to which he may be entitled pursuant to subparagraph
(b), (c), (d), (e), (f), or (g) of this Paragraph 10 if any such subparagraph becomes applicable, then the unpaid portion of such cash payments shall be paid by the Companies to the personal representative of the Executive’s estate at the same
time or times that the payments would have been made to the Executive if he still were living. 
  
 (l) Excess Parachute Payments. If any of the payments required to be made to the Executive pursuant to subparagraph (d), (e), or (f) of this Paragraph 10 constitute “excess parachute payments” within
the meaning of Section 280G of the Internal Revenue Code of 1986, as amended, and any regulations thereunder, and the Executive becomes liable for any excise tax on such “excess parachute payments” and any interest or penalties thereon
(such excise tax, interest, and penalties, collectively, the “Tax Penalties”), then the Companies (and the Permitted Assignee, if applicable) promptly shall make a cash payment (the “Additional Payment”) to the Executive in an
amount equal to the Tax Penalties. The Companies also promptly shall make an additional cash payment to the Executive in an amount rounded to the nearest $100.00 which is equal to any additional income, excise, and other taxes (using the individual
tax rates applicable to the Executive for the year for which such Tax Penalties are owed) for which the Executive will be liable as a result of the Executive’s receipt of the Additional Payment (the additional cash payment provided for in this
sentence being referred to as a “Gross-Up Payment”). In addition, the Executive shall be entitled to promptly receive from the Companies (and the Permitted Assignee, if applicable) a further Gross-Up Payment in respect of each prior
Gross-Up Payment until the amount of the last Gross-Up Payment is less than $100.00. 
  
 11. Nondisclosure. During the term of this agreement and thereafter, the Executive shall not, without the prior written consent of the Board or a person (other than the Executive) so authorized by the Board,
disclose or use for any purpose (except in the course of his employment under this agreement and in furtherance of the business of the Companies or any of their respective subsidiaries) any confidential information, trade secrets, or proprietary
data of the Companies or any of their respective subsidiaries (collectively, for purposes of this agreement, “Confidential Information”); provided, however, that Confidential Information shall not include any information then known
generally to the public or ascertainable from public or published information (other than as a result of unauthorized disclosure by the Executive) or any information of a type not otherwise considered confidential by persons engaged in the same
business or a business similar to that conducted by the Companies or their respective subsidiaries, as the case may be. 
  

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 12. Successors and Assigns. This agreement and all rights under this agreement shall be binding
upon, inure to the benefit of, and be enforceable by the parties hereto and their respective personal or legal representatives, executors, administrators, heirs, distributees, devisees, legatees, successors, and assigns. This agreement is personal
in nature, and none of the parties to this agreement shall, without the written consent of the others, assign or transfer this agreement or any right or obligation under this agreement to any other person or entity, except as permitted by Paragraph
14. 
  
 13. Notices. For purposes of this agreement,
notices and other communications provided for in this agreement shall be deemed to be properly given if delivered personally or sent either by next-business-day prepaid express delivery by a recognized national express delivery service or by United
States certified mail, return receipt requested, postage prepaid, in either case addressed as follows: 
  

			
	 If to the Executive:
	  	 c/o CSG Systems, Inc.

	 	  	 2525 North 117th Avenue

	 	  	 Omaha, NE 68164

		
	 If to the Companies:
	  	 Chief Executive Officer

	 	  	 CSG Systems International, Inc.

	 	  	 7887 East Belleview Avenue, Suite 1000

	 	  	 Englewood, Colorado 80111

		
	 	  	 with a copy to the General Counsel of the Companies,

  
 or to such other address as either
party may have furnished to the other party in writing in accordance with this paragraph. Such notices or other communications shall be effective only upon receipt. 
  
 14. Merger, Consolidation, Sale of Assets. In the event of (a) a merger of Systems with another corporation (other
than CSGS) in a transaction in which Systems is not the surviving corporation, (b) the consolidation of Systems into a new corporation resulting from such consolidation, (c) the sale or other disposition of all or substantially all of the assets of
Systems, the Companies may assign this agreement and all of the rights and obligations of the Companies under this agreement to the surviving, resulting, or acquiring entity (for purposes of this agreement, a “Permitted Assignee”);
provided, that such surviving, resulting, or acquiring entity shall in writing assume and agree to perform all of the obligations of the Companies under this agreement; and provided further, that the Companies shall remain jointly and severally
liable for the performance of the obligations of the Companies under this agreement in the event of a failure of the Permitted Assignee to perform its obligations under this agreement. 
  

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 15. Change of Control. For purposes of this agreement, a “Change of Control” shall be
deemed to have occurred upon the happening of any of the following events: 
  

	 	(a)	CSGS is merged or consolidated into another corporation, and immediately after such merger or consolidation becomes effective the holders of a majority of the outstanding shares of
voting capital stock of CSGS immediately prior to the effectiveness of such merger or consolidation do not own (directly or indirectly) a majority of the outstanding shares of voting capital stock of the surviving or resulting corporation in such
merger or consolidation; 

  

	 	(b)	any person, entity, or group of persons within the meaning of Sections 13(d) or 14(d) of the Securities Exchange Act of 1934 (the “1934 Act”) and the rules promulgated
thereunder becomes the beneficial owner (within the meaning of Rule 13d-3 under the 1934 Act) of thirty percent (30%) or more of the outstanding voting capital stock of CSGS; 

  

	 	(c)	the Common Stock of CSGS ceases to be publicly traded because of an issuer tender offer or other “going private” transaction (other than a transaction sponsored by the
then current management of CSGS); 

  

	 	(d)	CSGS dissolves or sells or otherwise disposes of all or substantially all of its property and assets (other than to an entity or group of entities which is then under common
majority ownership (directly or indirectly) with CSGS); 

  

	 	(e)	in one or more substantially concurrent transactions or in a series of related transactions, CSGS directly or indirectly disposes of a portion or portions of its business operations
(collectively, the “Sold Business”) other than by ceasing to conduct the Sold Business without its being acquired by a third party (regardless of the entity or entities through which CSGS conducted the Sold Business and regardless of
whether such disposition is accomplished through a sale of assets, the transfer of ownership of an entity or entities, a merger, or in some other manner) and either (i) the fair market value of the consideration received or to be received by CSGS
for the Sold Business is equal to at least fifty percent (50%) of the market value of the outstanding Common Stock of CSGS determined by multiplying the average of the closing prices for the Common Stock of CSGS on the thirty (30) trading days
immediately preceding the date of the first public announcement of the proposed disposition of the Sold Business by the average of the numbers of outstanding shares of Common Stock on such thirty (30) trading days or (ii) the revenues of the Sold
Business during the most recent four (4) calendar quarters ended prior to the first public announcement of the proposed disposition of the Sold Business represented fifty percent (50%) or more of the total consolidated revenues of CSGS during such
four (4) calendar quarters; or 

  

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	 	(f)	during any period of two consecutive years or less, individuals who at the beginning of such period constituted the Board of Directors of CSGS cease, for any reason, to constitute
at least a majority of the Board of Directors of CSGS, unless the election or nomination for election of each new director of CSGS who took office during such period was approved by a vote of at least seventy-five percent (75%) of the directors of
CSGS still in office at the time of such election or nomination for election who were directors of CSGS at the beginning of such period. 

  
 16. Miscellaneous. No provision of this agreement may be modified, waived, or discharged unless such waiver, modification, or discharge is agreed
to in writing and is signed by the Executive and an officer of CSGS (other than the Executive) so authorized by the Board. No waiver by any party to this agreement at any time of any breach by any other party of, or compliance by any other party
with, any condition or provision of this agreement to be performed by such other party shall be deemed to be a waiver of similar or dissimilar provisions or conditions at the same or any prior or subsequent time. No agreements or representations,
oral or otherwise, express or implied, with respect to the subject matter of this agreement have been made by any party that are not expressly set forth in this agreement. 
  
 17. Representations of Companies. The Companies severally represent and warrant to the Executive that they have full
legal power and authority to enter into this agreement, that the execution and delivery of this agreement by the Companies have been duly authorized by their respective boards of directors, and that the performance of their respective obligations
under this agreement will not violate any agreement between the Companies, or either of them, and any other person, firm, or organization. 
  
 18. Non-Solicitation of Employees. For a period of one (1) year after the effective date of the termination of the Executive’s employment
under this agreement for any reason, whether voluntarily or involuntarily and with or without cause, without the prior written consent of CSGS the Executive agrees (i) not to directly or indirectly employ, solicit for employment, assist any other
person in employing or soliciting for employment, or advise or recommend to any other person that such other person employ or solicit for employment any person who then is an employee of the Companies (or either of them) or any of the respective
subsidiaries of the Companies and (ii) not to recommend to any then employee of the Companies (or either of them) or any of the respective subsidiaries of the Companies that such employee leave the employ of such employer. 
  
 19. Post-Termination Noncompetition. Because the Confidential
Information known to or developed by the Executive during his employment by the Companies encompasses at the highest level information concerning the plans, strategies, products, operations, and existing and prospective customers of the Companies
and their respective subsidiaries and could not practically be disregarded by the Executive, the Executive acknowledges that the Executive’s provision of executive services to a competitor of the Companies (or either of them) or any of the
respective subsidiaries of the Companies soon after the termination of the Executive’s employment by the Companies would inevitably result in the use of the Confidential Information 

  

 13 

 
by the Executive in his performance of such executive services, even if the Executive were to use his best efforts to avoid such use of the Confidential
Information. To prevent such use of the Confidential Information and the resulting unfair competition and wrongful appropriation of the goodwill and other valuable proprietary interests of the Companies and their respective subsidiaries, the
Executive agrees that for a period of one (1) year after the termination of his employment by the Companies for any reason, whether voluntarily or involuntarily and with or without cause, the Executive will not, directly or indirectly: 

 

	 	(a)	engage, whether as an employee, agent, consultant, independent contractor, owner, partner, member, or otherwise, in a business activity which then competes in a material way with a
business activity then being actively engaged in by the Companies (or either of them) or any of the respective subsidiaries of the Companies; 

  

	 	(b)	solicit or recommend to any other person that such period solicit any then customer of the Companies (or either or them) or any of the respective subsidiaries of the Companies,
which customer also was a customer of the Companies (or either of them) or any of the respective subsidiaries of the Companies at any time during the one (1) year period prior to the termination of the Executive’s employment by the Companies,
for the purpose of obtaining the business of such customer in competition with the Companies (or either of them) or any of the respective subsidiaries of the Companies; or 

  

	 	(c)	induce or attempt to induce any then customer or prospective customer of the Companies (or either of them) or any of the respective subsidiaries of the Companies to terminate or not
commence a business relationship with the Companies (or either of them) or any of the respective subsidiaries of the Companies. 

  
 The Companies and the Executive acknowledge and agree that the restrictions contained in this Paragraph 19 are both reasonable and necessary in view of the
Executive’s positions with the Companies and that the Executive’s compensation and benefits under this agreement are sufficient consideration for the Executive’s acceptance of such restrictions. Nevertheless, if any of the
restrictions contained in this Paragraph 19 are found by a court having jurisdiction to be unreasonable, or excessively broad as to geographic area or time, or otherwise unenforceable, then the parties intend that the restrictions contained in this
Paragraph 19 be modified by such court so as to be reasonable and enforceable and, as so modified by the court, be fully enforced. Nothing contained in this paragraph shall be construed to preclude the investment by the Executive of any of his
assets in any publicly owned entity so long as the Executive has no direct or indirect involvement in the business of such entity and owns less than 2% of the voting equity securities of such entity. Nothing contained in this paragraph shall be
construed to preclude the Executive from becoming employed by or serving as a consultant to or having dealings with a publicly owned entity one of whose businesses is a competitor of the Companies (or either of them) or any of the respective
subsidiaries of the Companies so long as such employment, consultation, or dealings do not directly or indirectly involve or relate to the business of such entity which is a competitor of the Companies (or either of them) or any of the respective
subsidiaries of the Companies. 
  

 14 

 20. Joint and Several Obligations. All of the obligations of the Companies under this agreement
are joint and several; and neither the bankruptcy, insolvency, dissolution, merger, consolidation, or reorganization nor the cessation of business or corporate existence of one of the Companies shall affect, impair, or diminish the obligations under
this agreement of the other of the Companies. The compensation and benefits to which the Executive is entitled under this agreement are aggregate compensation and benefits, and the payment of such compensation or the provision of such benefits by
one of the Companies shall to the extent of such payment or provision satisfy the obligations of the other of the Companies. The Companies may agree between themselves as to which of them will be responsible for some or all of the Executive’s
compensation and benefits under this agreement, but any such agreement between the Companies shall not diminish to any extent the joint and several liability of the Companies to the Executive for all of such compensation and benefits. 
  
 21. Injunctive Relief. The Executive acknowledges that his violation
of the provisions and restrictions contained in Paragraphs 11, 18, and 19 could cause significant injury to the Companies for which the Companies would have no adequate remedy at law. Accordingly, the Executive agrees that the Companies will be
entitled, in addition to any other rights and remedies that then may be available to the Companies, to seek and obtain injunctive relief to prevent any breach or potential breach of any of the provisions and restrictions contained in Paragraph 11,
18, or 19. 
  
 22. Dispute Resolution. Subject to the
provisions of Paragraph 21, any claim by the Executive or the Companies arising from or in connection with this agreement, whether based on contract, tort, common law, equity, statute, regulation, order, or otherwise (a “Dispute”), shall
be resolved as follows: 
  

	 	(a)	Such Dispute shall be submitted to mandatory and binding arbitration at the election of either the Executive or the particular Company involved (the “Disputing Party”).
Except as otherwise provided in this Paragraph 22, the arbitration shall be pursuant to the Commercial Arbitration Rules of the American Arbitration Association (the “AAA”). 

  

	 	(b)	 To initiate the arbitration, the Disputing Party shall notify the other party in writing within 30 days after the occurrence of the event or events which give rise
to the Dispute (the “Arbitration Demand”), which notice shall (i) describe in reasonable detail the nature of the Dispute, (ii) state the amount of any claim, (iii) specify the requested relief, and (iv) name an arbitrator who (A) has been
licensed to practice law in the U.S. for at least ten years, (B) has no past or present relationship with either the Executive or the Companies, and (C) is experienced in representing clients in connection with employment related disputes (the
“Basic Qualifications”). Within fifteen (15) days after the other party’s receipt of the Arbitration Demand, such other party shall serve on the Disputing Party a written statement (i) answering the claims set forth in the Arbitration
Demand and including any affirmative 

  

 15 

	 	 
defenses of such party, (ii) asserting any counterclaim, which statement shall (A) describe in reasonable detail the nature of the Dispute relating to the
counterclaim, (B) state the amount of the counterclaim, and (C) specify the requested relief, and (iii) naming a second arbitrator satisfying the Basic Qualifications. Promptly, but in any event within five (5) days thereafter, the two arbitrators
so named shall select a third neutral arbitrator from a list provided by the AAA of potential arbitrators who satisfy the Basic Qualifications and who have no past or present relationship with the parties’ counsel, except as otherwise disclosed
in writing to and approved by the parties. The arbitration will be heard by a panel of the three arbitrators so chosen (the “Arbitration Panel”), with the third arbitrator so chosen serving as the chairperson of the Arbitration Panel.
Decisions of a majority of the members of the Arbitration Panel shall be determinative. 

  

	 	(c)	The arbitration hearing shall be held in Denver, Colorado. The Arbitration Panel is specifically authorized to render partial or full summary judgment as provided for in the Federal
Rules of Civil Procedure. The Arbitration Panel will have no power or authority, under the Commercial Arbitration Rules of the AAA or otherwise, to relieve the parties from their agreement hereunder to arbitrate or otherwise to amend or disregard
any provision of this agreement, including, without limitation, the provisions of this Paragraph 22. 

  

	 	(d)	If an arbitrator refuses or is unable to proceed with arbitration proceedings as called for by this Paragraph 22, such arbitrator shall be replaced by the party who selected such
arbitrator or, if such arbitrator was selected by the two party-appointed arbitrators, by such two party-appointed arbitrators’ selecting a new third arbitrator in accordance with Paragraph 22(b), in either case within five (5) days after such
declining or withdrawing arbitrator’s giving notice of refusal or inability to proceed. Each such replacement arbitrator shall satisfy the Basic Qualifications. If an arbitrator is replaced pursuant to this Paragraph 22(d) after the arbitration
hearing has commenced, then a rehearing shall take place in accordance with the provisions of this Paragraph 22(d) and the Commercial Arbitration Rules of the AAA. 

  

	 	(e)	Within ten (10) days after the closing of the arbitration hearing, the Arbitration Panel shall prepare and distribute to the parties a writing setting forth the Arbitration
Panel’s finding of facts and conclusions of law relating to the Dispute, including the reason for the giving or denial of any award. The findings and conclusions and the award, if any, shall be deemed to be confidential information.

  

	 	(f)	 The Arbitration Panel is instructed to schedule promptly all discovery and other procedural steps and otherwise to assume case management initiative and control to
effect an efficient and expeditious resolution of the Dispute. The Arbitration Panel is authorized to issue monetary sanctions against 

  

 16 

	 	 
either party if, upon a showing of good cause, such party is unreasonably delaying the proceeding. 

  

	 	(g)	Any award rendered by the Arbitration Panel will be final, conclusive, and binding upon the parties, and any judgment on such award may be entered and enforced in any court of
competent jurisdiction. 

  

	 	(h)	Each party will bear a pro rata share of all fees, costs, and expenses of the arbitrators; and, notwithstanding any law to the contrary, each party will bear all of the fees, costs,
and expenses of his or its own attorneys, experts, and witnesses. However, in connection with any judicial proceeding to compel arbitration pursuant to this agreement or to enforce any award rendered by the Arbitration Panel, the prevailing party in
such a proceeding will be entitled to recover reasonable attorneys’ fees and expenses incurred in connection with such proceedings, in addition to any other relief to which such party may be entitled. 

  

	 	(i)	Nothing contained in the preceding provisions of this Paragraph 22 shall be construed to prevent either party from seeking from a court a temporary restraining order or other
injunctive relief pending final resolution of a Dispute pursuant to this Paragraph 22. 

  
 23. No Duty to Seek Employment. The Executive shall not be under any duty or obligation to seek or accept other employment following the
termination of his employment by the Companies; and, except as expressly provided in subparagraphs (b)(iv), (d)(i), and (d)(v) of Paragraph 10, no amount, payment, or benefit due the Executive under this agreement shall be reduced, suspended, or
discontinued if the Executive accepts such other employment. 
  
 24. Withholding of Taxes. The Companies may withhold from any amounts payable to the Executive under this agreement all federal, state, and local taxes which are required to be so withheld by any applicable law or governmental
regulation or ruling. 
  
 25. Validity. The invalidity or
unenforceability of any provision or provisions of this agreement shall not affect the validity or enforceability of any other provision of this agreement, which other provision shall remain in full force and effect; nor shall the invalidity or
unenforceability of a portion of any provision of this agreement affect the validity or enforceability of the balance of such provision. 
  
 26. Counterparts. This document may be executed in one or more counterparts, each of which shall be deemed to be an original and all of which
together shall constitute a single agreement. 
  
 27.
Headings. The headings of the paragraphs contained in this document are for reference purposes only and shall not in any way affect the meaning or interpretation of any provision of this agreement. 
  

 17 

 28. Applicable Law. This agreement shall be governed by and construed in accordance with the
internal substantive laws, and not the choice of law rules, of the State of Colorado. 
  
 IN WITNESS WHEREOF, the Companies and the Executive have executed this agreement on the day and year first above written. 
  

			
	CSG SYSTEMS INTERNATIONAL, INC.,
	a Delaware corporation
		
	By:	 	 /s/ Edward C. Nafus

	 	 	 Edward C. Nafus, President and
 Chief Executive
Officer

	
	CSG SYSTEMS, INC., a Delaware
	corporation
		
	By:	 	 /s/ Edward C. Nafus

	 	 	 Edward C. Nafus, President and
 Chief Executive
Officer

	
	 /s/ Robert M. Scott

	Robert M. Scott

  

 18Agreement dated June 2, 2005

 Exhibit 10.1 
  
 AGREEMENT 
  
 THIS AGREEMENT is made and entered into as of this 2nd day of June, 2005, by and among the persons and entities listed on Schedule A hereto (individually,
a “Criterion Party” and collectively, the “Criterion Parties”) and Centra Software, Inc., a Delaware corporation (the “Company”). 
  

WHEREAS, the Criterion Parties filed a joint statement on Schedule 13D under the Securities Exchange Act of 1934, as amended (the “1934
Act”), dated October 12, 2004 reflecting beneficial ownership of the common stock, $0.001 par value, of the Company (the “Common Stock”) in excess of five percent (5%); 
  
 WHEREAS, by letter dated January 28, 2005 addressed to the Nominating and Governance Committee of the Company, Evan C.
Marwell, an affiliate of the Criterion Parties (“Marwell”), expressed an interest in joining the Company’s Board of Directors; 
  
 WHEREAS, by letters dated April 1, 2005 and April 13, 2005, pursuant to Section 220 of the Delaware General Corporation Law (the “DGCL”), the
Criterion parties requested, among other things, copies of the Company’s list of record stockholders for the purpose of communicating with other stockholders of the Company on matters relating to their interests as stockholders, including, but
not limited to, the composition of the Company’s Board of Directors, the potential removal of existing Directors and election of Directors to be nominated by the Criterion Parties; 
  
 WHEREAS, the Company has heretofore furnished to the Criterion Parties certain of the materials requested in the letters of
April 1 and April 13, 2005; 
  
 WHEREAS, by letter dated May 20,
2005 the Criterion Parties notified the Company of their intention to nominate Marwell and Anthony Swei (“Swei”) for election as Directors at the 2005 Annual Meeting of Stockholders and to the solicit proxies in support of the election of
Marwell and Swei as Directors (the “Possible Proxy Contest”); 
  
 WHEREAS, the Board has determined that it is in the best interests of the Company and its stockholders to avoid the expense and distraction of a Possible Proxy Contest; 
  
 WHEREAS, the Board and the Criterion Parties believe it to be in the best interest of the Company to fill a vacancy on the
Board of Directors in the class of Directors having a term expiring at the Annual Meeting of Stockholders in 2007, by electing Marwell to be a Class II Director; and 
  
 WHEREAS, the Criterion Parties have agreed among other things to terminate actions in furtherance of a Possible Proxy
Contest, including withdrawing the May 20, 2005 Notice of nomination of Marwell and Swei for election as Directors at the 2005 Annual Meeting of Stockholders, and to vote shares of common stock in favor of the nominees proposed by the Board of
Directors in accordance with the terms of this Agreement. 
  
 NOW,
THEREFORE, in consideration of the mutual covenants and agreements herein contained and for other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereby agree as follows: 
  
 Section 1. Appointment of Class II Director. 
  
 1.1 Appointment. The Company agrees that, as the initial item of
business to be taken up at the meeting of the Board of Directors immediately following the 2005 Annual Meeting of Stockholders, the Board will appoint Marwell as a Class II Director pursuant to Section 4.6 of the by-laws of the Company. The Board
will consider in good faith the appointment of Marwell to one or more standing committees of the Board of Directors at that time. 

 1.2 Access to Board Information. The Company shall furnish Marwell with the set of materials
prepared for and provided to the Directors in advance of the meeting of the Board of Directors to be held following the 2005 Annual Meeting of Stockholders. Such materials shall be delivered to Marwell at the time they are delivered to the
Directors. Marwell agrees to keep all such materials and information confidential and to use the same only in furtherance of his duties as a Director of the Company. 
  
 Section 2. Covenants of the Parties. 
  
 2.1 Terminate Possible Proxy Contest. Simultaneously with the execution and delivery of this Agreement, each of the Criterion Parties shall cease
all efforts, direct and indirect, in furtherance of a Possible Proxy Contest, including, without limitation, by filing an amendment to the Criterion Parties’ Joint Statement on Schedule 13D disclosing the terms and conditions of this Agreement.
Each Criterion Party hereby withdraws the April 1, 2005 and April 13, 2005 requests for information pursuant to Section 220 of the DGCL and the May 20, 2005 notice of nomination of Marwell and Swei for election as Directors. 
  
 2.2 Support of Nominees Selected by the Board. Each Criterion Party
shall cause all shares of the Company’s Common Stock beneficially owned by it, and all shares of Common Stock acquired after the day hereof and prior to the conclusion of the 2005 Annual Meeting of Stockholders with respect to which it has the
power to direct the voting of such shares, to be voted in favor of the election of the individuals identified as nominees for Directors selected by the Board of Directors and any actions required in furtherance thereof, at the 2005 Annual Meeting of
Stockholders or at any adjournments or postponements thereof. Promptly following the mailing of the definitive proxy statement of the Company for the 2005 Annual Meeting of Stockholders, each Criterion Party agrees to deliver to the Company a proxy
in favor of the nominees identified in the proxy statement of the Company, in the form attached hereto as Exhibit A, which shall be irrevocable with respect to the shares of Common Stock beneficially owned by such party. 
  
 2.3. Standstill Obligations. Each Criterion Party hereby agrees with
the Company that, during the period commencing on the date hereof and ending on the first anniversary of the 2005 Annual Meeting of Stockholders of the Company (the “Standstill Period”), none of the Criterion Parties or their affiliates or
associates (A) will directly or indirectly or (B) will directly or indirectly solicit, request, advise, aid, assist or encourage any other person or entity to: 
  

(a) solicit proxies or written consents of stockholders with respect to Common Stock under any circumstances, or make, or in any way participate in,
directly or indirectly, any “solicitation” of any “proxy” to vote any shares of Common Stock, or become a “participant” in any “solicitation” (as such terms are used or defined in Regulation 14 promulgated
under the General Rules and Regulations under the 1934 Act) whether or not relating to the election or removal of directors of the Company except as may be required by Section 2.2 hereof; 
  
 (b) seek to call, or to request the call of, a special meeting of
stockholders of the Company or demand to inspect any records of the Company pursuant to Section 220 of the DGCL; provided, however, that the restrictions on action set forth in this Subsection 2.3(b) shall not limit, impair or
otherwise affect the right of Marwell to take action solely in his capacity as a Director of the Company; 
  
 (c) submit or propose for consideration at any meeting of the Company’s stockholders one or more stockholder proposals, as described in Rule 14a-8
under the 1934 Act or otherwise; or 
  
 (d) make public, or cause
or assist any other person to make public (including by disclosure to any journalist, other representative of the media or securities analyst) any request for any waiver or amendment of any provision of this Agreement, or the taking of any action
restricted hereby. 
  
 2.4 Mutual Covenant. The Company, on
the one hand, and each of the Criterion Parties, on the other hand, hereby agree that during the Standstill Period each such party shall not, directly or indirectly, institute any claim, action, cause of action, suit, administrative action or
proceeding of any kind, against the other party or any of 

 
its former, present or future directors, officers, employees, representatives, agents (hereinafter collectively referred to as a “Cause of Action”)
or solicit, advise, encourage, and or assist, directly or indirectly, any person or entity in bringing any such Cause of Action, except to the extent necessary to enforce its rights under this Agreement. 
  
 Section 3. Public Statements. 
  
 3.1. Press Release. Promptly after the execution of this Agreement,
the Company will issue a press release substantially in the form of Exhibit B attached hereto. Thereafter, during the Standstill Period, except (i) as required by law in a Schedule 13D Amendment prepared by any Criterion Party, or (ii) as required
by law in proxy materials prepared by the Company pursuant to Regulation 14A of the 1934 Act or in any report required to be filed by the Company pursuant to the 1934 Act or (iii) otherwise as may be required by law (it being understood that nothing
contained in this Section 3.1 shall be deemed to permit any action or disclosure which is otherwise prohibited by this Agreement), the Company, on the one hand, and each of the Criterion Parties, on the other hand, hereby agree that each such party
and its affiliates and associates shall not, directly or indirectly, make or issue or cause to be made or issued under circumstances reasonably likely to result in public disclosure or dissemination, any disclosure, announcement or statement
concerning the other party or any of its respective past, present or future general partners, directors, officers, or employees without the prior written consent of the other party; provided, that the foregoing shall not limit, impair or
otherwise affect the obligation of any Director of the Company, including Marwell upon his election, to fulfill the duty of candor owed to the other Directors and to the stockholders of the Company. 
  
 3.2 No Derogatory Statements. The Company, on the one hand, and each
of the Criterion Parties, on the other hand, hereby agree that during the Standstill Period, each such party and its affiliates and associates shall not, directly or indirectly, make or issue or cause to be made or issued any disclosure,
announcement or statement (including, without limitation, the filing of any document or report with the SEC or any other governmental agency or any disclosure to any journalist, member of the media or securities analyst) concerning the other party
or any of its respective past, present or future general partners, directors, officers, or employees, which portrays such party or any of its respective past, present or future general partners, directors, officers, or employees in an unfavorable
light; provided, that the foregoing shall not limit, impair or otherwise affect the obligation of any Director of the Company, including Marwell upon his election, to fulfill the duty of candor owed to the other Directors and to the
stockholders of the Company. 
  
 3.3. No Limitation on
Rights. Nothing in this Section 3 shall prevent any of the parties hereto from enforcing its rights under this Agreement or shall impose any limitation on any of the parties or their respective past, present or future general partners,
directors, officers, or employees in defending any claim, action, cause of action, suit, administrative action or proceeding of any kind, including, without limitation, any federal, state or other governmental proceeding of any kind, against any of
them. 
  
 Section 4. Representations and Warranties. 
  
 4.1. Due Authorization. Each of the parties hereto represents and
warrants with respect to itself that such party is duly empowered and authorized to execute, deliver and perform this Agreement, that such party has taken all necessary action to authorize the execution, delivery and performance of this Agreement,
that this Agreement has been duly authorized, executed and delivered by such party and that this Agreement is the valid and binding agreement of such party, enforceable against such party in accordance with its terms. 
  
 4.2. Beneficial Ownership. Each of the Criterion Parties hereby
represents and warrants to the Company that as of the date hereof: the Criterion Parties and their affiliates and associates are the beneficial owners (as determined in accordance with the provisions of Rule 13d-3 promulgated under the 1934 Act) of
the respective number of shares of Common Stock set forth opposite their names on Schedule A hereto which aggregate 1,736,900 shares of Common Stock. 

 Section 5. Remedies. 
  
 5.1. Irreparable Harm. Each party hereto acknowledges and agrees that irreparable injury to the other parties would occur in the event any of the
provisions of this Agreement were not performed in accordance with their specific terms or were otherwise breached. It is accordingly agreed that the parties shall be entitled to an injunction or injunctions to prevent and enjoin breaches of the
provisions of this Agreement and to enforce specifically the terms and provisions hereof in any state or federal court in The Commonwealth of Massachusetts, in addition to any other remedy to which they may be entitled at law or in equity.

  
 5.2. Jurisdiction and Venue. Each party hereto agrees
that any legal action or proceeding arising out of or relating to this Agreement, any of the transactions contemplated hereby or any document referred to herein, shall be instituted only in a state or federal court located in The Commonwealth of
Massachusetts, and such party consents to the jurisdiction and venue of those courts and waives any objection to the inconvenience of those forums for such legal action or proceeding. 
  
 Section 6. Miscellaneous. 
  
 6.1. Entire Agreement. This Agreement contains the entire understanding of the parties with respect to the subject matters hereof. This Agreement
may be amended only by an agreement in writing executed by the parties hereto. 
  
 6.2. Headings. Descriptive headings are for convenience only and shall not control or affect the meaning or construction of any provision of this Agreement. 
  
 6.3. Pronouns. Whenever the singular number is used herein, the same
shall include the plural where appropriate, and words of any gender shall include each other gender where appropriate. 
  
 6.4. Notices. All notices, requests and other communications required or permitted hereunder shall be in writing and shall be sufficiently given if
delivered by hand, or sent by certified mail postage prepaid, by overnight courier service, or by telecopy or other written form of electronic communication confirmed in writing to the address set forth below: 
  
 if to the Company: 
  
 Centra Software, Inc. 
 430 Bedford Street 
 Lexington, Massachusetts 02420 
 Attn: Leon Navickas, President and Chief Executive Officer 
 Facsimile: (781) 863-7288 
  
 With a copy to: 
  
 Robert L. Birnbaum, Esq. 
 Foley Hoag LLP 
 155 Seaport Boulevard 
 Boston, Massachusetts 02210 
 Facsimile: (617) 832-7000 
  
 and
if to the Criterion Parties: 
  
 R. Daniel
Beckham 
 Criterion Capital Management LLC 
 435 Pacific Avenue, 5th Floor 
 San Francisco, CA 94133 
 Facsimile: (415) 249-1299 

 With a copy to: 
  

Michael S. Ringler, Esq. 
 Wilson, Sonsini, Goodrich & Rosati P.C. 
 One Market Street 
 Spear Tower, Suite 3300 
 San Francisco, CA 94105 
 Facsimile: (415) 947-2099 
  
 or to such other address as shall be furnished in writing by the Company or the Criterion
Parties, as the case may be, to the other party, and such notice, request or communication shall be deemed to have been given as of the date so delivered, mailed, dispatched or transmitted and confirmed in writing (except that notice of a change of
address shall not be deemed to have been given until received by the addressee). 
  
 6.5. Severability. If any term, provision, covenant or restriction of this Agreement is held by a court of competent jurisdiction to be invalid, void or unenforceable, the remainder of the terms, provisions,
covenants and restrictions of this Agreement shall remain in full force and effect and shall in no way be affected, impaired or invalidated. It is hereby stipulated and declared to be the intention of the parties that the parties would have executed
the remaining terms, provisions, covenants and restrictions without including any of such which may be hereafter declared invalid, void or unenforceable. In addition, the parties agree to use their best efforts to agree upon and substitute a valid
and enforceable term, provision, covenant or restriction for any of such that is held invalid, void or unenforceable by a court of competent jurisdiction. 
  
 6.6. Governing Law. This Agreement shall be governed by and construed and enforced in accordance with the internal laws of the State of Delaware.

  
 6.7. Successors and Assigns. This Agreement shall be
binding upon and inure to the benefit of and be enforceable by the successors and assigns of the parties hereto. 
  
 6.8. Joint Obligations. All obligations under this Agreement of the Criterion Parties shall be joint and several; provided, however,
that in the event that any Criterion Party hereafter files a Schedule 13D Amendment indicating that such Criterion Party is no longer a member of the group of Criterion Parties, no other Criterion Party shall be jointly and severally obligated for
such Criterion Party’s actions taken more than ninety (90) days after the filing of such Schedule 13D Amendment. 
  
 6.9. Certain Definitions. The terms “affiliate” and “associate” as used in this Agreement shall have the meanings ascribed to
them in Rule 12b-2 under the General Rules and Regulations under the 1934 Act, as presently in effect. For purposes of this Agreement, beneficial ownership shall be determined in accordance with the provisions of Rule 13d-3 under the 1934 Act, as
presently in effect. As used in this Agreement, the term “person” or “entity” shall mean any individual, partnership, corporation, group, syndicate, trust, government or agency thereof, or any other association or entity.

  
 6.10. Execution in Counterparts. This Agreement may be
executed in one or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. 
  
 6.11. Waiver; Amendment. Any failure of any party to comply with any obligation, covenant, agreement or condition herein may be waived by the party
entitled to the benefit of such obligation, covenant, agreement or condition only by a written instrument signed by such party, but such waiver or failure to insist upon strict compliance with such obligation, covenant, agreement or condition shall
not operate as a waiver of, or estoppel with respect to, any subsequent or other failure. 
  
 IN WITNESS WHEREOF, each of the parties hereto has executed this Agreement, or caused the same to be executed individually or by its duly authorized representative, as of the date first above written. 

			
	CENTRA SOFTWARE, INC.
		
	By:	 	 /s/ Leon Navickas

	 	 	Leon Navickas, Chief Executive Officer
	
	CRITERION CAPITAL MANAGEMENT, LLC
		
	By:	 	 /s/ Christopher H. Lord

	 	 	Christopher H. Lord, Manager
	
	CRITERION INSTITUTIONAL PARTNERS, LP
		
	By:	 	Criterion Capital Management, LLC, its General Partner
		
	By:	 	 /s/ Christopher H. Lord

	 	 	Christopher H. Lord, Manager

			
	CRITERION CAPITAL PARTNERS, LP
		
	By:	 	 Criterion Capital Management, LLC, its General
 Partner

		
	By:	 	 /s/ Christopher H. Lord

	 	 	Christopher H. Lord, Manager
	
	CRITERION CAPITAL PARTNERS LTD.
		
	By:	 	 /s/ Christopher H. Lord

	Name:	 	Christopher H. Lord
	Title:	 	Manager
	
	 /s/ Christopher H. Lord

	Christopher H. Lord
	
	 /s/ Evan C. Marwell

	Evan C. Marwell
	
	 /s/ Anthony Swei

	Anthony Swei

  
  

 Schedule A 
  

Criterion Capital Management, LLC 
 Criterion Institutional Partners, LP

 Criterion Capital Partners, LP 
 Criterion Capital Partners,
Ltd. 
 Christopher H. Lord 
 Evan C. Marwell 
 Anthony Swei 

 Exhibit A 
  

IRREVOCABLE PROXY 
  
 The undersigned stockholder (the “Shareholder”) of Centra Software, Inc., a Delaware corporation (the “Company”), hereby
irrevocably appoints and constitutes each of Leon Navickas and Melinda J. Brown (collectively, the “Proxyholders”), the agents, attorneys-in-fact and proxies of the undersigned, with full power of substitution and resubstitution, to
the full extent of the undersigned’s rights with respect to the shares of capital stock of the Company which are listed below (the “Shares”), and any and all other shares or securities issued or issuable in respect thereof on
or after the date hereof and prior to the date this proxy terminates, to vote the Shares as follows: the Proxyholders named above are empowered at any time prior to termination of this proxy to exercise all voting and other rights (including,
without limitation, the power to execute and deliver written consents with respect to the Shares) of the undersigned at every annual, special or adjourned meeting of the Company stockholders, and in every written consent in lieu of such a meeting,
or otherwise, in favor of the reelection of · and · as Directors of the Company. 
  
 The Proxyholders may
not exercise this proxy on any other matter. The Shareholder may vote the Shares on all matters other than those set forth in the immediately preceding paragraph. The proxy granted by the Shareholder to the Proxyholders hereby is granted as of the
date of this Irrevocable Proxy in order to secure the obligations of the Shareholder set forth in the Agreement between the Shareholder and the Company dated May     , 2005 (the “Agreement”), and is irrevocable
and coupled with an interest in such obligations and in the interests in the Shareholder set forth in the Agreement. 
  
 This proxy will terminate upon the termination of the Agreement in accordance with its terms. Upon the execution hereof, all prior proxies given by the
undersigned with respect to the Shares and any and all other shares or securities issued or issuable in respect thereof on or after the date hereof are hereby revoked and no subsequent proxies will be given until such time as this proxy shall be
terminated in accordance with its terms. Any obligation of the undersigned hereunder shall be binding upon the successors and assigns of the undersigned. The undersigned Shareholder agrees to notify any purchaser of the Shares of the existence of
this irrevocable proxy. The undersigned Shareholder authorizes the Proxyholders to file this proxy and any substitution or revocation of substitution with the Secretary of the Company and with any Inspector of Elections at any meeting of the
shareholders of the Company. 
  
 This proxy is irrevocable and
shall survive the insolvency, incapacity, death or liquidation of the undersigned. 
  

			
	Dated: June      2005.	 	 
	 	 	  

	 	 	    Signature
		
	 	 	  

	 	 	    Name (and Title)
		
	 	 	     Shares of Company Common Stock
     beneficially owned:

		
	 	 	  

  
  

 Exhibit B 
  

			
	PRESS CONTACT:	  	 INVESTOR CONTACT:
  

	Ellen Slaby	  	Kristine Mozes
	781-994-1068	  	781-869-4162
	eslaby@centra.com	  	kmozes@centra.com

  
 CENTRA ANNOUNCES NEW
BOARD MEMBER 
 Centra to Add Evan C. Marwell to its Board. Criterion Withdraws its Nominees for Election; Agrees to Vote For

 Centra Nominees. 
  
 LEXINGTON, Mass. – June 2, 2005 - Centra Software, Inc. (NASDAQ: CTRA) today announced that it will appoint Mr. Evan C. Marwell (age 39), an affiliate of
Criterion Capital Management LLC, to fill the vacancy on the Board of Directors created when Paul Gudonis resigned from the Company in April. In connection with the appointment, Criterion has entered into an agreement with Centra under which
Criterion will withdraw its nominees for election to the Centra Board of Directors and will vote in favor of the nominees made by the Centra Board of Directors at the upcoming Annual Meeting in July. Mr. Marwell will be appointed immediately after
the Annual Meeting. 
  
 Mr. Marwell is a Partner and Managing Director of the
investment team for Criterion Capital Management, LLC, Centra’s largest institutional shareholder. Before joining Criterion, he was the President and CEO of Quixi, Inc., a venture backed CRM software and services company. Prior to working with
Quixi, Mr. Marwell was the Founder and President of INFONXX, a global provider of directory assistance services to wireless carriers and Fortune 500 corporations. He began his career as a management consultant at Corporate Decisions Inc. (now Mercer
consulting) and received an undergraduate degree in Economics, cum laude, from Harvard College and an M.B.A., with honors, from Harvard Business School in 1992. 
  
 “We are delighted to have resolved matters with Criterion and we welcome Evan to our team of board members,” said Leon Navickas,
Chairman and CEO of Centra. “We are fortunate to have someone with Evan’s knowledge of Centra and of the software sector in general. His experience as a chief executive officer coupled with his software background will complement the
current Board’s composition.” 
  
 “I believe that my appointment to
Centra’s Board reflects the value that a substantial, long-term investor with significant industry experience can bring to a company,” said Mr. Marwell. “I look forward to working closely with Leon and the rest of the executive team
and Board to achieve our shared goal of increasing shareholder value at Centra.” 
  
 About Centra 
  
 Online learning and training solutions from
Centra create workforce efficiencies and enable organizations to share and exchange business-critical information with geographically distributed customers, partners, prospects and employees. Centra’s solutions integrate real-time
communication, collaboration and learning and departmental 

 
business processes with specialized applications that increase sales effectiveness, improve collaborative learning and accelerate enterprise application
rollouts and customer acquisition initiatives. Currently available in 9 languages, Centra solutions can be deployed as on-site software or through its ASP service and are supported by an active ecosystem of value-added partners, including Siebel,
PeopleSoft, SAP and Deloitte Consulting. Organizations across every major industry and market sector choose Centra, including Wyndham Internation, Weyerhaeuser, Underwriters Laboratories, BMW and Stanford University. Headquartered in Lexington,
Massachusetts, Centra serves a worldwide customer base throughout the Americas, Europe, Asia and Australia. For more information, visit www.centra.com. 
  

Safe Harbor Statement Regarding Forward-Looking Statements 
  
 With the exception of the historical information contained in this release, the matters described herein contain forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995, including but not limited to, statements about the beliefs and expectations of management regarding the Company’s future performance, the Company’s strategic initiatives, its ability to
achieve and maintain a leadership position in real-time conferencing and collaboration, demand for the Company’s software services and management’s goals and objectives regarding future results of operations. These statements reflect
management’s beliefs and expectations as of the date of this statement, and involve risk and uncertainties that may cause actual results, events and performance to differ materially. These risk factors include, but are not limited to, risks
associated with the Company’s ability to successfully execute its strategic plan, the effect of the Company’s cost-cutting measures on its operations, acceptance by customers of the Company’s Enterprise Advantage Subscription pricing
model, significant changes in our senior management team, customer fulfillment of the entire term of multi-year subscription contracts, uncertainty of market reaction to the Company’s sales and marketing efforts, product demand for and market
acceptance of the Centra 7 collaboration platform, the Company’s ability to sell and deliver its Enterprise Application Rollout and Sales Effectiveness solutions and other future products, the effect of economic conditions generally on the
market for IT spending and for the Company’s products, the results of future research and development activities, the impact of competitive products and pricing, technological difficulties and/or other factors outside the control of the
Company. There is no assurance that the Company will be able to implement its growth and operating plans as anticipated, or achieve its revenue and earnings goals. For a description of additional risks, and uncertainties, please refer to the
Company’s filings with the SEC, including its Annual Report on Form 10-K for the year ended December 31, 2004 and its Form 10-Q for the three months ended March 31, 2005, which are available at
http://www.centra.com/investorrelations. Readers are cautioned not to place undue reliance on the forward-looking statements contained herein, which speak only as of the date hereof. The Company undertakes no obligation to release
publicly the result of any revisions to these forward-looking statements that may be made to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events. SHAREHOLDERS ARE ADVISED TO READ THE PROXY
STATEMENT AND OTHER DOCUMENTS RELATED TO SOLICITATION OF PROXIES BY CENTRA FOR USE AT ITS ANNUAL MEETING OF STOCKHOLDERS WHEN IT BECOMES AVAILABLE BECAUSE IT WILL CONTAIN IMPORTANT INFORMATION. WHEN COMPLETED, A DEFINITIVE PROXY STATEMENT AND FORM
OF PROXY WILL BE MAILED TO SHAREHOLDERS OF CENTRA AND WILL BE AVAILABLE AT NO CHARGE AT THE SECURITIES AND EXCHANGE COMMISSION’S WEBSITE AT HTTP://WWW.SEC.GOV.

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