Document:

Amendment to Employment Agreement with Georges Antoun

 Exhibit 10.42 
  
 REDBACK NETWORKS INC. 
  
 AMENDMENT TO EMPLOYMENT AGREEMENT 
  
 This Amendment (the “Amendment”) is made this      day of September 2006, by and between Georges Antoun
(“Executive”) and Redback Networks Inc. (the “Company”), to the offer letter dated March 14, 2003 (“Offer Letter”), as amended by the Amendment to Offer Letter dated January 3, 2004,
between the Company and Executive (the “Employment Agreement”) 
  
 WHEREAS, on July 27, 2006, the Board of Directors of the Company approved amendments to certain agreements with the Company’s executive officers of the Company to provide appropriate incentives for
the Company’s executive officers in connection with a Change in Control (as defined in the Company’s 1999 Stock Incentive Plan) (“the Change in Control Provisions”); and 
  
 WHEREAS, the parties hereto wish to amend the Employment Agreement to
reflect the revised Change in Control Provisions. 
  
 NOW,
THEREFORE, in consideration of the foregoing and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged and agreed, the Company and Executive agree that the Employment Agreement shall be amended as
follows: 
  
 1. Severance Agreement. The
following text shall be added to Section 4 of the Employment Agreement titled “Severance Agreement”: 
  
 “In the event a Change in Control occurs (as defined in the Plan), you will have accelerated vesting of 12 months worth of the
unvested options granted to you on June 1, 2006 or any additional equity compensation awards granted thereafter (collectively, the “Applicable Executive Equity Grants”). In the event a Change in Control occurs and if within 12
months following such Change in Control, either (A) your service with the Company is involuntarily terminated without Cause (as defined above) or (B) there is an involuntary reduction in the nature and scope of your service to the Company
(including a material reduction in your employment responsibilities), all then outstanding unvested shares under the Applicable Executive Equity Grants will vest. The provisions set forth in the preceding two sentences shall apply solely to
Applicable Executive Equity Grants and, except as expressly described above, shall not modify any other provision of your employment or other written agreements with the Company.” 
  
 2. Entire Agreement. This Amendment, the award agreements relating to the Applicable Executive Equity
Grants and the Employment Agreement constitute the entire agreement relating to the subject matter hereof, and the Employment Agreement shall remain unchanged and in full force and effect, including the “AT WILL” nature of your employment
as set forth in Section 3 of the Employment Agreement. 
  
 3. Governing Law. This Amendment will be governed by the laws of the State of California (with the exception of its conflict of laws provisions). 
  
 (Signature page follows) 

 IN WITNESS WHEREOF, this Amendment has been entered into as of the date first set forth above.

  
 THE COMPANY: 
  
 REDBACK NETWORKS INC. 
  

									
	 By:
	 	  

	 	 	 	Date:	 	  

	 Title:
	 	  

	 	 	 	 	 	 
				
	EXECUTIVE:	 	 	 	 	 	 
				
	
	 	 	 	Date:	 	  

	Georges Antoun	 	 	 	 	 	 

  
 (signature page to
Amendment to Georges Antoun Employment Agreement)Amendment to Employment Agreement with Thomas L. Cronan III

 Exhibit 10.43 
  
 REDBACK NETWORKS INC. 
  
 AMENDMENT TO EMPLOYMENT AGREEMENT 
  
 This Amendment (the “Amendment”) is made this      day of September 2006, by and between Thomas L. Cronan, III
(“Executive”) and Redback Networks Inc. (the “Company”), to the offer letter dated January 15, 2003 between the Company and Executive (the “Employment Agreement”) 
  
 WHEREAS, on July 27, 2006, the Board of Directors of the Company
approved amendments to certain agreements with the Company’s executive officers of the Company to provide appropriate incentives for the Company’s executive officers in connection with a Change of Control (as defined in the Company’s
1999 Stock Incentive Plan) (the “Change in Control Provisions”); and 
  
 WHEREAS, the parties hereto wish to amend the Employment Agreement to reflect the revised Change in Control Provisions. 
  

NOW, THEREFORE, in consideration of the foregoing and other good and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged and agreed, the Company and Executive agree that the Employment Agreement shall be amended as follows: 
  
 1. Option Agreement. The following text shall be added to Section 4 of the Employment Agreement titled “Option
Agreement”: 
  
 “In the event a Change
in Control occurs (as defined in the Plan), you will have accelerated vesting of 12 months worth of the unvested options granted to you on June 1, 2006 or any additional equity compensation awards granted thereafter (collectively, the
“Applicable Executive Equity Grants”). In the event a Change in Control occurs and if within 12 months following such Change in Control, either (A) your service with the Company is involuntarily terminated without Cause (as
defined above) or (B) there is an involuntary reduction in the nature and scope of your service to the Company (including a material reduction in your employment responsibilities), all then outstanding unvested shares under the Applicable
Executive Equity Grants will vest. The provisions set forth in the preceding two sentences shall apply solely to Applicable Executive Equity Grants and, except as expressly described above, shall not modify any other provision of your
employment or other written agreements with the Company.” 
  
 2. Entire Agreement. This Amendment, the award agreements relating to the Applicable Executive Equity Grants and the Employment Agreement constitute the entire agreement relating to the subject matter hereof,
and the Employment Agreement shall remain unchanged and in full force and effect, including the “AT WILL” nature of your employment under the Employment Agreement. 
  
 3. Governing Law. This Amendment will be governed by the laws of the State of California (with the
exception of its conflict of laws provisions). 

 IN WITNESS WHEREOF, this Amendment has been entered into as of the date first set forth above.

  
 THE COMPANY: 
  
 REDBACK NETWORKS INC. 
  

									
	 By:
	 	  

	 	 	 	Date:	 	  

	 Title:
	 	  

	 	 	 	 	 	 
				
	EXECUTIVE:	 	 	 	 	 	 
				
	
	 	 	 	Date:	 	

	Thomas L. Cronan, III	 	 	 	 	 	 

  
 (signature page to
Amendment to Thomas L. Cronan, III Employment Agreement) 
  

 2Amendment to Employment Agreement with Scott Marshall

 Exhibit 10.44 
  
 REDBACK NETWORKS INC. 
  
 AMENDMENT TO EMPLOYMENT AGREEMENT 
  
 This Amendment (the “Amendment”) is made this             day of September
2006, by and between Scott Marshall (“Executive”) and Redback Networks Inc. (the “Company”), to the offer letter dated September 6, 2004 between the Company and Executive (the “Employment
Agreement”) 
  
 WHEREAS, on July 27, 2006,
the Board of Directors of the Company approved amendments to certain agreements with the Company’s executive officers of the Company to provide appropriate incentives for the Company’s executive officers in connection with a Change of
Control (as defined in the Company’s 1999 Stock Incentive Plan) (the “Change in Control Provisions”); and 
  
 WHEREAS, the parties hereto wish to amend the Employment Agreement to reflect the revised Change in Control Provisions. 
  
 NOW, THEREFORE, in consideration of the foregoing and other good and
valuable consideration, the receipt and sufficiency of which is hereby acknowledged and agreed, the Company and Executive agree that the Employment Agreement shall be amended as follows: 
  
 1. Change in Control. The following text shall be added to Section D of the Employment
Agreement titled “Change in Control”: 
  
 “In the event a Change in Control occurs (as defined in the Plan), you will have accelerated vesting of 12 months worth of the unvested options granted to you on June 1, 2006 or any additional equity compensation awards granted
thereafter (collectively, the “Applicable Executive Equity Grants”). In the event a Change in Control occurs and if within 12 months following such Change in Control, either (A) your service with the Company is involuntarily
terminated without cause or (B) there is an involuntary reduction in the nature and scope of your service to the Company (including a material reduction in your employment responsibilities), all then outstanding unvested shares under the
Applicable Executive Equity Grants will vest. The provisions set forth in the preceding two sentences shall apply solely to the Applicable Executive Equity Grants and, except as expressly described above, shall not modify any other provision
of your employment or other written agreements with the Company.” 
  
 2. Entire Agreement. This Amendment, the award agreements relating to the Applicable Executive Equity Grants and the Employment Agreement constitute the entire agreement relating to the subject matter hereof,
and the Employment Agreement shall remain unchanged and in full force and effect, including the “AT WILL” nature of your employment under the Employment Agreement. 
  
 3. Governing Law. This Amendment will be governed by the laws of the State of California (with the
exception of its conflict of laws provisions). 

 IN WITNESS WHEREOF, this Amendment has been entered into as of the date first set forth above.

  
 THE COMPANY: 
  
 REDBACK NETWORKS INC. 
  

									
	 By:
	 	  

	 	 	 	Date:	 	  

	 Title:
	 	  

	 	 	 	 	 	 
				
	EXECUTIVE:	 	 	 	 	 	 
				
	
	 	 	 	Date:	 	  

	Scott Marshall	 	 	 	 	 	 

  
 (signature page to
Amendment to Scott Marshall Employment Agreement) 
  

 2Amendment to Employment Agreement with Kevin A. DeNuccio

 Exhibit 10.45 
  
 REDBACK NETWORKS INC. 
  
 AMENDMENT TO EMPLOYMENT AGREEMENT 
  
 This Amendment (the “Amendment”) is made this     day of September 2006, by and between Kevin A. DeNuccio
(“CEO”) and Redback Networks Inc. (the “Company”), to the offer letter dated August 17, 2001 (“Offer Letter”), as amended by Amendment #1 to the Agreement, between the Company and CEO (the
“Employment Agreement”). 
  
 WHEREAS, on
July 27, 2006, the Board of Directors of the Company approved amendments to certain agreements with the CEO to reduce the benefits CEO would become entitled to receive in connection with a Change in Control (as defined in the Company’s
1999 Stock Incentive Plan) (“the Change in Control Provisions”); 
  
 WHEREAS, the parties hereto wish to amend the Employment Agreement to reflect the revised Change in Control Provisions. 
  

NOW, THEREFORE, in consideration of the foregoing and other good and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged and agreed, the Company and CEO agree that the Employment Agreement shall be amended as follows: 
  
 1. Stock Options. The following text shall be added to end of Section 6 of the Employment Agreement titled “Stock
Options”: 
  
 “In the event a Change in
Control (as defined under the Plan) occurs, any Company options or other equity compensation awards granted to you on June 1, 2006 or thereafter (collectively, the “Applicable CEO Equity Grants”) shall accelerate vesting 100%,
except as to any then unvested shares under the Applicable CEO Equity Grants subject to the final twelve months of vesting (or such lesser amount if less than twelve months of vesting remains on such Applicable CEO Equity Grants) which shall not
accelerate and shall remain subject to the normal vesting schedule per the terms of the applicable stock option or other applicable agreement. 
  
 In the event a Change in Control occurs and if within 12 months following such Change in Control, your service with the Company is
Involuntarily Terminated other than for Cause, all then outstanding unvested shares under the Applicable CEO Equity Grants shall accelerate vesting 100%; provided, however, that the following circumstances shall not in and of themselves constitute
“Good Reason” under the terms of this Agreement: 1) you not being appointed Chief Executive Officer of the acquiring entity; or 2) you remaining as the chief executive officer of the subsidiary or division substantially containing the
Company’s business following the Change of Control. 
  
 The provisions set forth in the two paragraphs above shall apply solely to the stock option grant made to you on June 1, 2006 and, unless otherwise modified, any other equity compensation awards to you in
the future. Except as expressly described above, the foregoing provisions shall not modify any other written agreements between you and the Company.” 
  
 2. Entire Agreement. This Amendment, the award agreements relating to the Applicable CEO Equity Grants and the Employment Agreement
constitute the entire agreement relating to the subject matter hereof, and the Employment Agreement shall remain unchanged and in full force and effect, including the “AT WILL” nature of your employment as set under the Employment
Agreement. 
  
 3. Governing Law. This
Amendment will be governed by the laws of the State of California (with the exception of its conflict of laws provisions). 
  
 (the remainder of this page intentionally left blank) 

 IN WITNESS WHEREOF, this Amendment has been entered into as of the date first set forth above.

  
 THE COMPANY: 
  
 REDBACK NETWORKS INC. 
  

									
	 By:
	 	  

	 	 	 	Date:	 	  

	 Title:
	 	  

	 	 	 	 	 	 
				
	CEO:	 	 	 	 	 	 
				
	
	 	 	 	Date:	 	  

	Kevin A. DeNuccio	 	 	 	 	 	 

  
 (signature page to
Amendment to Kevin A. DeNuccio Employment Agreement)

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