Document:

Exhibit 10.29

 

Sonus Networks, Inc.

 

7 Technology Park Drive, Westford MA 01886

 

December 28, 2007

 

Mr. Wayne Pastore

 

Dear Wayne:

 

I am pleased to provide you with the terms and conditions of our offer of employment to you by Sonus Networks, Inc. (the “Company”). This offer is contingent upon the satisfactory completion of a background check and references.

 

1.             Position. Your initial position will be Director, Business Process Improvement, reporting to Rick Gaynor. In addition to performing duties and responsibilities associated with the position of Director, Business Process Improvement from time to time the Company may assign you other duties and responsibilities.

 

As a full-time employee of the Company, you will be expected to devote your full business time and energies to the business and affairs of the Company.

 

2.             Starting Date/Nature of Relationship. It is expected that your employment will start on or within 1 week from February 4, 2008. No provision of this letter shall be construed to create an express or implied employment contract for a specific period of time. Employment at Sonus Networks, Inc. is considered “at will” and either you or the Company may terminate the employment relationship at any time and for any reason.

 

3.             Compensation.

 

(a)                                  Your initial salary will be at the rate of $8,750.00 paid twice monthly, annualized at $210,000.00. You will be eligible to participate in a Bonus Program for 2008 with a target of 20% of annual base salary. Objectives will be agreed upon between you and your manager within the first ninety days of your employment.

 

(b)                                 You will be granted an option to purchase 100,000 shares of common stock under the Company’s Incentive Stock Plan, subject to the terms of the Plan and requisite corporate approval. The stock options will be priced on the first 15th of the month following your start date.

 

4.             Employment Eligibility. In compliance with the Immigration Reform and Control Act of 1986, you are required to establish your identity and employment eligibility. Therefore, on your first day of employment you will be required to fill out an Employment Verification Form and present documents in accordance with this form.

 

5.             Benefits. You will be entitled as an employee of the Company to receive such benefits as are generally provided its employees in accordance with Company policy as in effect from time to time. Company benefits include group health, life and dental insurance, and liberal holidays, vacation and 401K programs. All employees begin accruing three (3) weeks of vacation upon date of hire. The Company is committed to providing a healthy work environment for every employee. Therefore, we provide a smoke free environment and require all employees to comply.

 

The Company retains the right to change, add or cease any particular benefit.

 

 

6.             Confidentiality. The Company considers the protection of its confidential information and proprietary materials to be very important. Therefore, as a condition of your employment, you and the Company will become parties to a Noncompetition and Confidentiality Agreement. Two copies of this agreement are sent with this offer letter. Both copies must be signed and returned to the Company prior to the first day of employment.

 

7.             General.

 

(a)                                  This letter will constitute our entire agreement as to your employment by the Company and will supersede any prior agreements or understandings, whether in writing or oral.

 

(b)                                 This letter shall be governed by the law of the Commonwealth of Massachusetts.

 

(c)                                  Sonus Networks is an equal opportunity employer.

 

You may accept this offer of employment and the terms and conditions thereof by confirming your acceptance by December 28, 2007. Please send your signed letter to the company, or via e-mail to Nancy Forte at nforte@sonusnet.com which execution will evidence your agreement with the terms and conditions set forth herein and therein. You may retain the enclosed copy of this letter for your records. We are enthusiastic about you joining us, and believe that our technical and business goals will provide every opportunity for you to achieve your personal and professional objectives.

 

 

	
Very truly yours,
    	
 
    
	
 
    	
 
    
	
 
    	
 
    
	
/s/ Kathleen Harris
    	
 
    
	
Kathleen Harris
    	
 
    
	
Vice President, Human ResourcesQuickLinks
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  Exhibit 10(jjjj)    
    

 
    Amendment No. 1
  to
  Employment Agreement    
    

        This Amendment No. 1 ("Amendment"), dated as of March 7, 2011 between
James Reid-Anderson and Six Flags Entertainment Corporation amends that certain Employment Agreement, dated as of August 12, 2010 (the
"Agreement") between James Reid-Anderson and Six Flags Entertainment Corporation. Capitalized terms used but not defined herein shall have
the meanings ascribed thereto in the Employment Agreement.  

	1.
	Effective
as of January 1, 2011, Section 2(c) of the Agreement is hereby amended in its entirety to read as follows: 

        "(a)    Location.    Executive's principal place of employment shall be located at the Company's offices in Gurnee,
Illinois but Executive shall be required to travel to and render services at other Company locations, including, without limitation, corporate headquarters (the "Headquarters"), as may reasonably be
required by Executive's duties hereunder."  

	2.
	Except
as set forth in this Amendment, the Agreement remains in full force and effect. 

        IN
WITNESS WHEREOF, the undersigned execute this Amendment as of the date set forth above. 

 

 

							
	 
	 	SIX FLAGS ENTERTAINMENT CORPORATION
	 
	 	 By:
	 	 /s/ WALTER S. HAWRYLAK

 
	 
	 	 	 	Name:	 	Walter S. Hawrylak
	 
	 	 	 	Title:	 	 SVP-Administration
	 
	 	 /s/ JAMES REID-ANDERSON

  James Reid-Anderson

 

 

QuickLinks

Exhibit 10(jjjj)

Amendment No. 1 to Employment AgreementQuickLinks
 -- Click here to rapidly navigate through this document

 

 
 

  Exhibit 10(kkkk)    
    

 
    Form of Amendment by and between Six Flags Entertainment Corporation Certain Executives—James
  Reid-Anderson, Al Weber, Jr., John M. Duffey and Lance C. Balk    
    

        Six Flags Entertainment Corporation ("Company")
and                                ("Executive") hereby agree to amend
[Exhibit C][Exhibit B] to the [amendment to the] employment agreement dated as of [August 12,
2010] [September 7, 2010] by and between the Company and Executive to substitute the words "adjusted target EBITDA" for the words "the adjusted EBITDA
achieved" in subsection "2012 EBITDA" of the "Normal Vesting" section of the "Vesting" portion of
[Exhibit C][Exhibit B]. [Exhibit C][Exhibit B], as hereby amended, sets
forth the terms of a performance award under the Six Flags Entertainment Corporation Long-Term Incentive Plan. 

 

 

							
	 
	 	SIX FLAGS ENTERTAINMENT CORPORATION
	 
	 	 By:
	 	   

 
	 
	 	 	 	Its:	 	 

 
	 
	 	   

           
[                                         
                   ]

 

 

QuickLinks

Exhibit 10(kkkk)

Form of Amendment by and between Six Flags Entertainment Corporation Certain Executives—James Reid-Anderson, Al Weber, Jr., John M. Duffey and Lance C. BalkQuickLinks
 -- Click here to rapidly navigate through this document

 

 
 

  Exhibit 10(llll)    
    

 
  PROJECT 350    
    
    FORM OF PERFORMANCE AWARD UNDER
  SIX FLAGS ENTERTAINMENT CORPORATION
  LONG-TERM INCENTIVE PLAN    
    

 

 

					
	Value	 	  •       
	 	 Eligibility.    The Executive will be granted a Project 350 Award after the Company achieves $350 million of adjusted EBITDA (the "Target
EBITDA") in any consecutive 12-month period ending on or before December 31, 2011.
	 
	 	  •       
	 	  Grant.    The number of shares included in the Executive's Project 350 Award if
the Target EBITDA is achieved will be equal to            shares of restricted stock (the "Base Number").

	 
	 	  •       
	 	  Grant Date.    The grant date of any Project 350 Award will be after completion
of the Company's 2011 audit.

	 
	 	  •       
	 	  Pro Rated Award.    The Executive will be granted a Project 350 Award in the
following amounts after achievement of the applicable adjusted EBITDA targets:

 

  

 

 

			
	Adjusted EBITDA

 
	 	Percentage of Base Number 
	 Below $330 million
	 	0%
	 $330 million
	 	50%
	 $350 million
	 	100%
	 $350+ million
	 	100% plus additional amountdetermined by the CompensationCommittee of the Board

 

 

 

									
	 	 	 	 	The size of the Project 350 Award will be interpolated on a straight line basis for performance between two amounts (e.g., a Project 350 Award equal to 75% of the Base Number for Adjusted EBITDA of
$340 million).
	 
	 	  •       
	 	   Target EBITDA Adjustment:    The 2011 adjusted EBITDA targets assume the Company
achieves $275 million of adjusted EBITDA for 2010. If the Company's 2010 adjusted EBITDA is more or less than $275 million, the 2011 adjusted EBITDA targets will be reduced or increased appropriately (e.g., if the 2010 adjusted EBITDA
is $280 million, the applicable 2011 adjusted EBITDA targets will be decreased by $5 million and if the 2010 adjusted EBITDA is $270 million, the applicable 2011 adjusted EBITDA targets will be increased by
$5 million).

	 
	 	  •       
	 	   Adjusted EBITDA.    The Audit Committee of the Board will determine the Company's
adjusted EBITDA after reviewing the Company's audited financial statements for the applicable year.

	 Form
	 	  •       
	 	   Form.    100% of the value of the Project 350 Award will be granted in the form of
restricted stock units.

	 Vesting
	 	  •       
	 	   Normal Vesting.    The Project 350 Award will vest if the following two vesting
conditions are met:

	 
	 	 	 	 	 	  •       
	 	  2012 EBITDA.    The Company's adjusted EBITDA for 2012 must be at least 97.5% of
adjusted target EBITDA for 2011. If this target is not achieved, 50% of the Project 350 Award will be immediately forfeited.

 

 

 

 

									
	 
	 	 	 	 	 	  •       
	 	  Time Vesting.    The outstanding Project 350 Award (i.e., determined after any forfeiture
due to the failure to achieve the 2012 adjusted EBITDA target) will vest on completion of the Company's 2012 audit if the Executive is then employed by the Company.

	 
	 	  •       
	 	   Accelerated Vesting.

	 
	 	 	 	 	 	  •       
	 	 In the event the Executive's employment is terminated by the Company without Cause or by the Executive for Good Reason (a
"Qualifying Termination") after the grant of the Project 350 Award, the Executive will vest in the pro rata portion (based on the portion of the time vesting period the executive is employed by the
Company) of the Project 350 Award that would otherwise have vested upon completion of the Company's 2012 audit (i.e., assuming the 2012 EBITDA target is achieved, the Executive will vest in a pro rata portion of the full Project 350
Award).

	 
	 	 	 	 	 	  •       
	 	 If, after the grant of a Project 350 Award, the Executive has a Qualifying Termination during the 12-month period following a
Change in Control, the Project 350 Award will 100% vest if the 2012 target EBITDA is achieved.

	 
	 	 	 	 	 	  •       
	 	 If the Executive's employment is terminated due to death/disability after the grant of the Project 350 Award, the Project 350
Award will 100% vest if the 2012 target EBITDA is achieved.

	 
	 	  •       
	 	   Other.    As a condition to receiving the Project 350 Award, the Executive will
waive any other applicable accelerated vesting provisions.

	 Other
	 	  •       
	 	   Miscellaneous.    The Project 350 Award will contain other customary terms and
conditions determined by the Compensation Committee.

 

 

QuickLinks

Exhibit 10(llll)

PROJECT 350 FORM OF PERFORMANCE AWARD UNDER SIX FLAGS ENTERTAINMENT CORPORATION LONG-TERM INCENTIVE PLAN

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