Document:

Severance Agreement (Deborah M. Mulryan)

 EXHIBIT 10.5 
 Severance Agreement 
 THIS SEVERANCE AGREEMENT
(“Agreement”) entered into on August 15, 2012, effective as of September 6, 2011 (the “Effective Date”) is entered by and between Deborah A. Mulryan (“Executive”) and GSI Group Inc., a company
organized under the laws of the Province of New Brunswick, Canada (the “Company”). 
 RECITALS

 WHEREAS, Executive is currently employed by the Company on an at-will basis; 

WHEREAS, the Company and Executive desire to maintain the continued services of Executive as an at-will employee of the Company on and
after the Effective Date; 
 WHEREAS, the Company and Executive desire to set forth all severance rights and obligations related
to termination of Executive’s employment and supersede all prior agreements and arrangements related thereto; and 

WHEREAS, the Company desires to encourage the continued attention and dedication of Executive to Executive’s duties of employment
without personal distraction or conflict of interest in circumstances which could arise from the occurrence of a Change in Control (as defined below). 
 AGREEMENT 
 NOW, THEREFORE, in exchange for good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, the Company and Executive agree as follows: 
 1. Certain Defined
Terms. In addition to terms defined elsewhere herein, the following terms have the following meanings when used in this Agreement with initial capital letters: 
 (a) “Annual Base Salary” shall mean the rate of Executive’s annual base salary as in effect from time to time. 

(b) “Board” shall mean the Board of Directors of the Company. 

(c) The Company shall have “Cause” to terminate Executive’s employment hereunder upon: (i) Executive’s
willful failure to substantially perform Executive’s duties to the Company and/or any of its subsidiaries (other than any such failure resulting from Executive’s Disability or any inability to engage in any substantial gainful activity
that could reasonably be expected to result in Disability) which is not remedied within 30 days after receipt of written notice from the Company specifying such failure; (ii) Executive’s willful failure to carry out, or comply with, in any
material respect any lawful and reasonable directive of the Board, the Chief Executive Officer of the Company or any direct supervisor of Executive, which is not remedied within 30 days after receipt of written notice from the Company specifying
such failure; (iii) Executive’s commission at any time of any act or omission that results in, or may reasonably be 

 
expected to result in, a conviction, plea of no contest, plea of nolo contendere, or imposition of unadjudicated probation for any felony or crime involving moral turpitude; or
(iv) Executive’s unlawful use (including being under the influence) or possession of illegal drugs on the Company’s premises or while performing Executive’s duties and responsibilities for the Company and/or any of its
subsidiaries. Whether or not an event giving rise to “Cause” occurs will be determined by the Board in its sole discretion. 
 (d) “Change in Control” shall mean and includes any of the following which occurs on or following the Effective Date: 

(i) A transaction or series of transactions (other than an offering of common shares of the Company to the general public through a
registration statement filed with the Securities and Exchange Commission) whereby any “person” or related “group” of “persons” (as such terms are used in Sections 13(d) and 14(d)(2) of the Securities Exchange Act of
1934, as amended from time to time (the “Exchange Act”)) (other than the Company, any of its subsidiaries, an employee benefit plan maintained by the Company or any of its subsidiaries or a “person” that, prior to such
transaction, directly or indirectly controls, is controlled by, or is under common control with, the Company) directly or indirectly acquires beneficial ownership (within the meaning of Rule 13d-3 under the Exchange Act) of securities of the Company
possessing more than 50% of the total combined voting power of the Company’s securities outstanding immediately after such acquisition; or 
 (ii) During any twelve-month period beginning on or following the Effective Date, individuals who, at the beginning of such period, constitute the Board together with any new director(s) (other than a
director designated by a person who shall have entered into an agreement with the Company to effect a transaction described in Section 1(d)(i) or Section 1(d)(iii)) whose election by the Board or nomination for election by the
Company’s stockholders was approved by a vote of at least a majority of the directors then still in office who either were directors at the beginning of the twelve-month period or whose election or nomination for election was previously so
approved, cease for any reason to constitute a majority thereof; or 
 (iii) The consummation by the Company (whether directly
involving the Company or indirectly involving the Company through one or more intermediaries) of (x) a merger, consolidation, reorganization, or business combination or (y) a sale or other disposition of all or substantially all of the
Company’s assets in any single transaction or series of related transactions or (z) the acquisition of assets or stock of another entity, in each case other than a transaction: 

(A) Which results in the Company’s voting securities outstanding immediately before the transaction continuing to
represent (either by remaining outstanding or by being converted into voting securities of the Company or the person that, as a result of the transaction, controls, directly or indirectly, the Company or owns, directly or indirectly, all or
substantially all of the Company’s assets or otherwise succeeds to the business of the Company (the Company or such person, the “Successor Entity”)) directly or indirectly, at least a majority of the combined voting power of
the Successor Entity’s outstanding voting securities immediately after the transaction, and 

  
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 (B) After which no person or group beneficially owns voting securities
representing 50% or more of the combined voting power of the Successor Entity; provided, however, that no person or group shall be treated for purposes of this Section 1(d)(iii)(B) as beneficially owning 50% or more
of combined voting power of the Successor Entity solely as a result of the voting power held in the Company prior to the consummation of the transaction; or 
 (iv) The Company’s stockholders approve a liquidation or dissolution of the Company. 
 The Board shall have full and final authority, which shall be exercised in its discretion, to determine conclusively whether a Change in Control has occurred pursuant to the above definition, and the date
of the occurrence of such Change in Control and any incidental matters relating thereto. 
 (e) “Code” shall
mean Internal Revenue Code of 1986, as amended. 
 (f) “Date of Termination” shall mean the actual date of
Executive’s termination of employment. 
 (g) “Disability” shall mean Executive’s inability to engage
in any substantial gainful activity by reason of any medically determinable physical or mental impairment that can be expected to result in death or that can be expected to last for a continuous period of not less than twelve (12) months.

 (h) Executive shall have “Good Reason” to terminate Executive’s employment within one (1) year
after the occurrence of one or more of the following conditions without Executive’s consent: (i) a material diminution in the nature or scope of Executive’s responsibilities, duties or authority; or (ii) a material change in the
geographic location at which Executive must perform Executive’s material services for the Company (which shall in no event include a relocation of Executive’s principal place of business less than 50 miles from the Bedford, Massachusetts
metropolitan area); provided, however, that, notwithstanding the foregoing, Executive may not terminate Executive’s employment for Good Reason unless: (A) Executive provides the Company with at least thirty (30) days
written notice of Executive’s intent to terminate for Good Reason (which notice is provided not later than the 90th day following Executive’s knowledge of the occurrence of the event constituting Good Reason); and (B) the Company does
not remedy the alleged violation(s) within such 30-day period. 
 (i) “Post-CIC Period” shall mean the period
beginning on the date of the first Change in Control after the Effective Date and ending on the twelve-month anniversary of such Change in Control. 
 (j) “Section 409A” shall mean Section 409A of the Code and the Department of Treasury Regulations and other interpretive guidance issued thereunder, including, without limitation,
any such regulations or other guidance that may be issued after the Effective Date. 
 2. Term of Agreement. The term of this Agreement
shall be for the period beginning on the Effective Date and ending on the third anniversary of the Effective Date (the “Initial Term”). The Initial Term shall automatically be extended for successive one year periods (such
extensions, collectively with the Initial Term, the “Term”), unless the Company gives notice of non-extension to Executive no later than 60 days prior to the expiration of the then-applicable Term. 

  
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 3. Severance Payments. 
 (a) If, at any time other than the Post-CIC Period, Executive’s employment is terminated by the Company without Cause, the Company shall, subject to Section 3(c) and to Executive’s
execution and non-revocation of a waiver and release of claims agreement in the Company’s customary form (a “Release”) in accordance with Section 16(c), pay to Executive, in substantially equal payments over twelve
months in accordance with the Company’s then-applicable payroll practices, an aggregate cash amount equal to 100% of Executive’s Annual Base Salary as in effect immediately prior to the Date of Termination. 

(b) If, during the Post-CIC Period, Executive’s employment is terminated by the Company without Cause or by Executive for Good
Reason, the Company shall, subject to Section 3(c) and to Executive’s execution and non-revocation of a Release in accordance with Section 16(c), pay to Executive, in substantially equal payments over eighteen months in
accordance with the Company’s then-applicable payroll practices, an aggregate cash amount equal to 150% of Executive’s Annual Base Salary as in effect immediately prior to the Date of Termination. 

(c) Notwithstanding any other provision of this Agreement, no payment shall be made pursuant to this Section 3 following the
date Executive first violates any restrictive covenants agreed to in writing by and between the Company and Executive if Executive does not cure such violation within 30 days of written notice thereof. 

(d) The provisions of this Section 3 shall supersede in their entirety any severance payment provisions in any severance
plan, policy, program or other arrangement maintained by the Company (including, without limitation, any agreement or arrangement by and between Executive and the Company). 
 4. Inventions Assignment/Non-Compete Agreement. As a condition precedent to the parties entering into this Agreement, Executive shall have executed and delivered to the Company an Employee Patent
and Proprietary Information Utilization, Non-Competition and Non-Solicitation Agreement (or similar agreement) in the Company’s then-applicable form. 
 5. Parachute Payments. Notwithstanding any other provision of this Agreement, to the extent Executive would be subject to the excise tax under Section 4999 of the Code on the payment made
under Section 3 hereof and any other payments or benefits Executive would receive from the Company required to be included in the calculation of parachute payments for purposes of Sections 280G and 4999 of the Code, the amount payable
under this Agreement shall be automatically reduced to an amount one dollar less than that, when combined with such other amounts and benefits required to be so included, would subject Executive to the excise tax under Section 4999 of the Code.

 6. Assignment and Successors. The Company may (a) assign its rights and obligations under this Agreement to any entity,
including, without limitation, any person or group of related persons that were involved in a Change in Control or any successor to all or substantially all the assets of the Company, by merger or otherwise, and (b) may assign or encumber this
Agreement and its rights hereunder as security for indebtedness of the Company and its Affiliates. Executive may not assign Executive’s rights or obligations under this Agreement to any individual or entity. This Agreement shall be binding upon
and inure to the benefit of the Company, Executive and their respective successors, assigns, personnel and legal representatives, executors, administrators, heirs, distributees, devisees, and legatees, as applicable. 

  
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 7. Notices. Any notice, request, claim, demand, document and other communication hereunder to any
party hereto shall be effective upon receipt (or refusal of receipt) and shall be in writing and delivered personally or sent by facsimile, telex, telecopy, or certified or registered mail, postage prepaid, to the following address (or at any other
address as any party hereto shall have specified by notice in writing to the other party hereto): 
  

	 	(a)	If to the Company: 

  

					
	GSI Group Inc.	  	
	125 Middlesex Turnpike	  	
	Bedford, MA 01730-1409	  	
	Attn:	 	Vice President, Human Resources	  	
	Fax Number: (781) 266-5115	  	
		
	and a copy to:	  	
		
	Latham & Watkins LLP	  	
	885 Third Avenue	  	
	New York, New York 10022-4802	  	
	Attn:	 	James C. Gorton	  	
		 	Bradd L. Williamson	  	
	Fax Number: (212) 751-4864	  	

  

	 	(b)	If to Executive, at the address set forth on the signature page hereto or the fax number in the Company’s records. 

8. Governing Law. This Agreement shall be governed, construed, interpreted and enforced in accordance with the substantive laws of the
Commonwealth of Massachusetts, without giving effect to any principles of conflicts of law, whether of the Commonwealth of Massachusetts or any other jurisdiction, and where applicable, the laws of the United States, that would result in the
application of the laws of any other jurisdiction. 
 9. Dispute Resolution. 

(a) With respect to disputes and claims hereunder, each of the parties irrevocably submits to the exclusive jurisdiction of any court of
competent jurisdiction sitting in Middlesex County, Massachusetts, for the purposes of any suit, action or other proceeding (a “Legal Action”) arising out of this Agreement, any related agreement or any transaction contemplated
hereby or thereby. Each of the parties hereto further agrees that service of any process, summons, notice or document by U.S. registered mail to such party’s respective address set forth or described in Section 7 shall be effective
service of process for any action, suit or proceeding in any court of competent jurisdiction sitting in Middlesex Country, Massachusetts with respect to any matters to which it has submitted to jurisdiction in this Section 9. Each of the
parties hereto irrevocably and unconditionally waives any objection to the laying of venue of any action, suit or proceeding arising out of this Agreement, any related document or the transactions contemplated

  
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hereby and thereby in any court of competent jurisdiction sitting in Middlesex County, Massachusetts, and hereby and thereby further irrevocably and unconditionally waives and agrees not to plead
or claim in any such court that any such action, suit or proceeding brought in any such court has been brought in an inconvenient forum. 
 (b) Notwithstanding anything to the contrary herein, prior to Executive initiating any Legal Action to resolve any dispute or claim under this Agreement, Executive shall first notify the Company in
writing of such dispute or claim and, during the thirty (30) days after receipt of such notice, the Company shall be entitled to request such dispute or claim be submitted to a mediation proceeding between the parties hereto in Middlesex
County, Massachusetts (or another location agreed to by the parties hereto) prior to initiation of any Legal Action. If (i) the Company elects to engage in a mediation proceeding and (ii) the parties hereto use commercially reasonable
efforts to timely resolve the dispute or claim through mediation and have not agreed in writing to a resolution of such dispute or claim pursuant to the mediation within forty-five (45) days after the commencement thereof, then Executive shall,
subject to Section 9(a), be entitled to initiate Legal Action with respect to such claim or dispute. Each party hereto shall bear its own costs and expenses incurred in connection with the mediation, and all costs and expenses of the
mediation proceeding shall be borne equally by the parties hereto. 
 (c) As a specifically bargained for inducement for each of
the parties hereto to enter into this Agreement (after having the opportunity to consult with counsel), each party hereto expressly waives the right to trial by jury in any lawsuit or proceeding relating to or arising in any way from this Agreement
or the matters contemplated hereby. 
 10. Entire Agreement. The terms of this Agreement (together with any other agreements and
instruments contemplated hereby or referred to herein) are intended by the parties hereto to be the final expression of their agreement with respect to the subject matter described herein (including, without limitation, any obligation of the Company
or its subsidiaries to make severance payments or provide severance benefits to Executive under any other agreement or arrangement) and supersede (and may not be contradicted by evidence of) any prior or contemporaneous agreements or arrangements
between the parties hereto regarding the subject matter described herein (including, without limitation, that certain offer letter by and between the Company and Executive, dated as of July 29, 2011). The parties hereto further intend that this
Agreement shall constitute the complete and exclusive statement of its terms and that no extrinsic evidence whatsoever may be introduced in any judicial, administrative, or other legal proceeding to vary the terms of this Agreement. Nothing in this
Agreement shall confer upon Executive any right to continue in the employ or service of the Company or any subsidiary thereof or shall interfere with or restrict in any way the rights of the Company and its subsidiaries, which rights are hereby
expressly reserved, to discharge or terminate the services of Executive at any time for any reason whatsoever, with or without Cause. 
 11.
Amendments; Waivers. This Agreement may not be modified, amended, or terminated except by an instrument in writing, signed by Executive and a duly authorized officer of the Company and approved by the Board, which expressly identifies the
amended provision of this Agreement. By an instrument in writing similarly executed and approved by the Board, Executive or a duly authorized officer of the Company may waive compliance by the other party or parties hereto with any provision of this
Agreement that such other party was or is obligated to comply with or perform; provided, however, that such waiver shall not operate as a waiver of, or estoppel with respect to, any other or subsequent failure to comply or perform. No
failure to exercise and no delay in exercising any right, remedy, or power hereunder shall preclude any other or further exercise of any other right, remedy, or power provided herein or by law or in equity. 

  
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 12. No Inconsistent Actions. The parties hereto shall not voluntarily undertake or fail to undertake
any action or course of action inconsistent with the provisions or essential intent of this Agreement. Furthermore, it is the intent of the parties hereto to act in a fair and reasonable manner with respect to the interpretation and application of
the provisions of this Agreement. 
 13. Enforcement. If any provision of this Agreement is held to be illegal, invalid or unenforceable
under present or future laws effective during the term of this Agreement, such provision shall be fully severable; this Agreement shall be construed and enforced as if such illegal, invalid or unenforceable provision had never comprised a portion of
this Agreement; and the remaining provisions of this Agreement shall remain in full force and effect and shall not be affected by the illegal, invalid or unenforceable provision or by its severance from this Agreement. Furthermore, in lieu of such
illegal, invalid or unenforceable provision there shall be added automatically as part of this Agreement a provision as similar in terms to such illegal, invalid or unenforceable provision as may be possible and be legal, valid and enforceable.

 14. Withholding. The Company shall be entitled to withhold from any amounts payable under this Agreement, any federal, state, local or
foreign withholding or other taxes or charges which the Company is required to withhold. The Company shall be entitled to rely on an opinion of counsel if any questions as to the amount or requirement of withholding shall arise. 

15. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed to be an original but all of which
together will constitute one and the same agreement. 
 16. Section 409A. 

(a) General. The parties hereto acknowledge and agree that, to the extent applicable, this Agreement shall be interpreted in
accordance with, and incorporate the terms and conditions required by, Section 409A. Notwithstanding any provision of this Agreement to the contrary, in the event that the Company determines that any amounts payable hereunder will be
immediately taxable to Executive under Section 409A, the Company reserves the right (without any obligation to do so or to indemnify Executive for failure to do so) to (i) adopt such amendments to this Agreement and appropriate policies
and procedures, including amendments and policies with retroactive effect, that the Company determines to be necessary or appropriate to preserve the intended tax treatment of the benefits provided by this Agreement, to preserve the economic
benefits of this Agreement and to avoid less favorable accounting or tax consequences for the Company and/or (ii) take such other actions as the Company determines to be necessary or appropriate to exempt the amounts payable hereunder from
Section 409A or to comply with the requirements of Section 409A and thereby avoid the application of penalty taxes thereunder. No provision of this Agreement shall be interpreted or construed to transfer any liability for failure to comply
with the requirements of Section 409A from Executive or any other individual to the Company or any of its Affiliates, employees or agents. 

  
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 (b) Separation from Service under Section 409A. Notwithstanding any provision to
the contrary in this Agreement: (i) no amount shall be payable pursuant to Section 3 in connection with Executive’s termination of employment with the Company unless the termination of Executive’s employment constitutes a
“separation from service” within the meaning of Section 1.409A-1(h) of the Department of Treasury Regulations; and (ii) for purposes of Section 409A, Executive’s right to receive any installment payments shall be
treated as a right to receive a series of separate and distinct payments. Notwithstanding any provision to the contrary in this Agreement, if Executive is deemed at the time of Executive’s separation from service to be a “specified
employee” for purposes of Section 409A(a)(2)(B)(i) of the Code, to the extent delayed commencement of any portion of the termination benefits to which Executive is entitled under this Agreement is required in order to avoid a prohibited
distribution under Section 409A(a)(2)(B)(i) of the Code, such portion of Executive’s termination benefits shall not be provided to Executive prior to the earlier of (A) the expiration of the six-month period measured from the date of
Executive’s “separation from service” with the Company (as such term is defined in the Treasury Regulations issued under Section 409A of the Code) or (B) the date of Executive’s death; upon the earlier of such dates,
all payments deferred pursuant to this sentence shall be paid in a lump sum to Executive or Executive’s estate, as applicable, and any remaining payments due under the Agreement shall be paid as otherwise provided herein. 

(c) Release. Notwithstanding anything to the contrary in this Agreement, to the extent that any payments of
“nonqualified deferred compensation” (within the meaning of Section 409A) due under this Agreement as a result of Executive’s termination of employment are subject to Executive’s execution and delivery of a Release,
(i) the Company shall deliver the Release to Executive within seven (7) days following the Date of Termination, and (ii) if Executive fails to execute the Release on or prior to the Release Expiration Date (as defined below) or timely
revokes Executive’s acceptance of the Release thereafter, Executive shall not be entitled to any payments or benefits otherwise conditioned on the Release. For purposes of this Section 16(c), “Release Expiration
Date” shall mean the date that is twenty-one (21) days following the date upon which the Company timely delivers the Release to Executive, or, in the event that Executive’s termination of employment is “in connection with an
exit incentive or other employment termination program” (as such phrase is defined in the Age Discrimination in Employment Act of 1967), the date that is forty-five (45) days following such delivery date. To the extent that any payments of
nonqualified deferred compensation (within the meaning of Section 409A) due under this Agreement as a result of Executive’s termination of employment are delayed pursuant to this Section 16(c), such amounts shall be paid in a
lump sum on the first payroll date to occur on or after the 90th day following the date of Executive’s termination of employment, provided that Executive executes and does not revoke the Release prior to such 90th day (and any applicable revocation period has expired). 

[signature page follows] 

  
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 IN WITNESS WHEREOF, the parties have caused this Agreement to be duly executed and delivered
as of the date first above written. 
  

	
	GSI GROUP INC.
	
	/s/ Robert Buckley
	By: Robert Buckley
	Title: Chief Financial Officer

  

	
	Deborah A. Mulryan
	
	/s/ Deborah A. Mulryan

  

			
	Residence Address:Severance Agreement (Jamie Bader)

 EXHIBIT 10.6 
 Severance Agreement 
 THIS SEVERANCE AGREEMENT
(“Agreement”) entered into on August 15, 2012, effective as of July 25, 2011 (the “Effective Date”) is entered by and between Jamie Bader (“Executive”) and GSI Group Inc., a company organized
under the laws of the Province of New Brunswick, Canada (the “Company”). 
 RECITALS 

WHEREAS, Executive is currently employed by the Company on an at-will basis; 

WHEREAS, the Company and Executive desire to maintain the continued services of Executive as an at-will employee of the Company on and
after the Effective Date; 
 WHEREAS, the Company and Executive desire to set forth all severance rights and obligations related
to termination of Executive’s employment and supersede all prior agreements and arrangements related thereto; and 

WHEREAS, the Company desires to encourage the continued attention and dedication of Executive to Executive’s duties of employment
without personal distraction or conflict of interest in circumstances which could arise from the occurrence of a Change in Control (as defined below). 
 AGREEMENT 
 NOW, THEREFORE, in exchange for good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, the Company and Executive agree as follows: 
 1. Certain Defined
Terms. In addition to terms defined elsewhere herein, the following terms have the following meanings when used in this Agreement with initial capital letters: 
 (a) “Annual Base Salary” shall mean the rate of Executive’s annual base salary as in effect from time to time. 

(b) “Board” shall mean the Board of Directors of the Company. 

(c) The Company shall have “Cause” to terminate Executive’s employment hereunder upon: (i) Executive’s
willful failure to substantially perform Executive’s duties to the Company and/or any of its subsidiaries (other than any such failure resulting from Executive’s Disability or any inability to engage in any substantial gainful activity
that could reasonably be expected to result in Disability) which is not remedied within 30 days after receipt of written notice from the Company specifying such failure; (ii) Executive’s willful failure to carry out, or comply with, in any
material respect any lawful and reasonable directive of the Board, the Chief Executive Officer of the Company or any direct supervisor of Executive, which is not remedied within 30 days after receipt of written notice from the Company specifying
such failure; (iii) Executive’s commission at any time of any act or omission that results in, or may reasonably be 

 
expected to result in, a conviction, plea of no contest, plea of nolo contendere, or imposition of unadjudicated probation for any felony or crime involving moral turpitude; or
(iv) Executive’s unlawful use (including being under the influence) or possession of illegal drugs on the Company’s premises or while performing Executive’s duties and responsibilities for the Company and/or any of its
subsidiaries. Whether or not an event giving rise to “Cause” occurs will be determined by the Board in its sole discretion. 
 (d) “Change in Control” shall mean and includes any of the following which occurs on or following the Effective Date: 

(i) A transaction or series of transactions (other than an offering of common shares of the Company to the general public through a
registration statement filed with the Securities and Exchange Commission) whereby any “person” or related “group” of “persons” (as such terms are used in Sections 13(d) and 14(d)(2) of the Securities Exchange Act of
1934, as amended from time to time (the “Exchange Act”)) (other than the Company, any of its subsidiaries, an employee benefit plan maintained by the Company or any of its subsidiaries or a “person” that, prior to such
transaction, directly or indirectly controls, is controlled by, or is under common control with, the Company) directly or indirectly acquires beneficial ownership (within the meaning of Rule 13d-3 under the Exchange Act) of securities of the Company
possessing more than 50% of the total combined voting power of the Company’s securities outstanding immediately after such acquisition; or 
 (ii) During any twelve-month period beginning on or following the Effective Date, individuals who, at the beginning of such period, constitute the Board together with any new director(s) (other than a
director designated by a person who shall have entered into an agreement with the Company to effect a transaction described in Section 1(d)(i) or Section 1(d)(iii)) whose election by the Board or nomination for election by the
Company’s stockholders was approved by a vote of at least a majority of the directors then still in office who either were directors at the beginning of the twelve-month period or whose election or nomination for election was previously so
approved, cease for any reason to constitute a majority thereof; or 
 (iii) The consummation by the Company (whether directly
involving the Company or indirectly involving the Company through one or more intermediaries) of (x) a merger, consolidation, reorganization, or business combination or (y) a sale or other disposition of all or substantially all of the
Company’s assets in any single transaction or series of related transactions or (z) the acquisition of assets or stock of another entity, in each case other than a transaction: 

(A) Which results in the Company’s voting securities outstanding immediately before the transaction continuing to
represent (either by remaining outstanding or by being converted into voting securities of the Company or the person that, as a result of the transaction, controls, directly or indirectly, the Company or owns, directly or indirectly, all or
substantially all of the Company’s assets or otherwise succeeds to the business of the Company (the Company or such person, the “Successor Entity”)) directly or indirectly, at least a majority of the combined voting power of
the Successor Entity’s outstanding voting securities immediately after the transaction, and 

  
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 (B) After which no person or group beneficially owns voting securities
representing 50% or more of the combined voting power of the Successor Entity; provided, however, that no person or group shall be treated for purposes of this Section 1(d)(iii)(B) as beneficially owning 50% or more
of combined voting power of the Successor Entity solely as a result of the voting power held in the Company prior to the consummation of the transaction; or 
 (iv) The Company’s stockholders approve a liquidation or dissolution of the Company. 
 The Board shall have full and final authority, which shall be exercised in its discretion, to determine conclusively whether a Change in Control has occurred pursuant to the above definition, and the date
of the occurrence of such Change in Control and any incidental matters relating thereto. 
 (e) “Code” shall
mean Internal Revenue Code of 1986, as amended. 
 (f) “Date of Termination” shall mean the actual date of
Executive’s termination of employment. 
 (g) “Disability” shall mean Executive’s inability to engage
in any substantial gainful activity by reason of any medically determinable physical or mental impairment that can be expected to result in death or that can be expected to last for a continuous period of not less than twelve (12) months.

 (h) Executive shall have “Good Reason” to terminate Executive’s employment within one (1) year
after the occurrence of one or more of the following conditions without Executive’s consent: (i) a material diminution in the nature or scope of Executive’s responsibilities, duties or authority; or (ii) a material change in the
geographic location at which Executive must perform Executive’s material services for the Company (which shall in no event include a relocation of Executive’s principal place of business less than 50 miles from the Bedford, Massachusetts
metropolitan area); provided, however, that, notwithstanding the foregoing, Executive may not terminate Executive’s employment for Good Reason unless: (A) Executive provides the Company with at least thirty (30) days
written notice of Executive’s intent to terminate for Good Reason (which notice is provided not later than the 90th day following Executive’s knowledge of the occurrence of the event constituting Good Reason); and (B) the Company does
not remedy the alleged violation(s) within such 30-day period. 
 (i) “Post-CIC Period” shall mean the period
beginning on the date of the first Change in Control after the Effective Date and ending on the twelve-month anniversary of such Change in Control. 
 (j) “Section 409A” shall mean Section 409A of the Code and the Department of Treasury Regulations and other interpretive guidance issued thereunder, including, without limitation,
any such regulations or other guidance that may be issued after the Effective Date. 
 2. Term of Agreement. The term of this Agreement
shall be for the period beginning on the Effective Date and ending on the third anniversary of the Effective Date (the “Initial Term”). The Initial Term shall automatically be extended for successive one year periods (such
extensions, collectively with the Initial Term, the “Term”), unless the Company gives notice of non-extension to Executive no later than 60 days prior to the expiration of the then-applicable Term. 

  
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 3. Severance Payments. 
 (a) If, at any time other than the Post-CIC Period, Executive’s employment is terminated by the Company without Cause, the Company shall, subject to Section 3(c) and to Executive’s
execution and non-revocation of a waiver and release of claims agreement in the Company’s customary form (a “Release”) in accordance with Section 16(c), pay to Executive, in substantially equal payments over twelve
months in accordance with the Company’s then-applicable payroll practices, an aggregate cash amount equal to 100% of Executive’s Annual Base Salary as in effect immediately prior to the Date of Termination. 

(b) If, during the Post-CIC Period, Executive’s employment is terminated by the Company without Cause or by Executive for Good
Reason, the Company shall, subject to Section 3(c) and to Executive’s execution and non-revocation of a Release in accordance with Section 16(c), pay to Executive, in substantially equal payments over eighteen months in
accordance with the Company’s then-applicable payroll practices, an aggregate cash amount equal to 150% of Executive’s Annual Base Salary as in effect immediately prior to the Date of Termination. 

(c) Notwithstanding any other provision of this Agreement, no payment shall be made pursuant to this Section 3 following the
date Executive first violates any restrictive covenants agreed to in writing by and between the Company and Executive if Executive does not cure such violation within 30 days of written notice thereof. 

(d) The provisions of this Section 3 shall supersede in their entirety any severance payment provisions in any severance
plan, policy, program or other arrangement maintained by the Company (including, without limitation, any agreement or arrangement by and between Executive and the Company). 
 4. Inventions Assignment/Non-Compete Agreement. As a condition precedent to the parties entering into this Agreement, Executive shall have executed and delivered to the Company an Employee Patent
and Proprietary Information Utilization, Non-Competition and Non-Solicitation Agreement (or similar agreement) in the Company’s then-applicable form. 
 5. Parachute Payments. Notwithstanding any other provision of this Agreement, to the extent Executive would be subject to the excise tax under Section 4999 of the Code on the payment made
under Section 3 hereof and any other payments or benefits Executive would receive from the Company required to be included in the calculation of parachute payments for purposes of Sections 280G and 4999 of the Code, the amount payable
under this Agreement shall be automatically reduced to an amount one dollar less than that, when combined with such other amounts and benefits required to be so included, would subject Executive to the excise tax under Section 4999 of the Code.

 6. Assignment and Successors. The Company may (a) assign its rights and obligations under this Agreement to any entity,
including, without limitation, any person or group of related persons that were involved in a Change in Control or any successor to all or substantially all the assets of the Company, by merger or otherwise, and (b) may assign or encumber this
Agreement and its rights hereunder as security for indebtedness of the Company and its Affiliates. Executive may not assign Executive’s rights or obligations under this Agreement to any individual or entity. This Agreement shall be binding upon
and inure to the benefit of the Company, Executive and their respective successors, assigns, personnel and legal representatives, executors, administrators, heirs, distributees, devisees, and legatees, as applicable. 

  
 4 

 7. Notices. Any notice, request, claim, demand, document and other communication hereunder to any
party hereto shall be effective upon receipt (or refusal of receipt) and shall be in writing and delivered personally or sent by facsimile, telex, telecopy, or certified or registered mail, postage prepaid, to the following address (or at any other
address as any party hereto shall have specified by notice in writing to the other party hereto): 
  

	 	(a)	If to the Company: 

  

					
	GSI Group Inc.	  	
	125 Middlesex Turnpike	  	
	Bedford, MA 01730-1409	  	
	Attn:	 	Vice President, Human Resources	  	
	Fax Number: (781) 266-5115	  	
		
	and a copy to:	  	
		
	Latham & Watkins LLP	  	
	885 Third Avenue	  	
	New York, New York 10022-4802	  	
	Attn:	 	James C. Gorton	  	
		 	Bradd L. Williamson	  	
	Fax Number: (212) 751-4864	  	

  

	 	(b)	If to Executive, at the address set forth on the signature page hereto or the fax number in the Company’s records. 

8. Governing Law. This Agreement shall be governed, construed, interpreted and enforced in accordance with the substantive laws of the
Commonwealth of Massachusetts, without giving effect to any principles of conflicts of law, whether of the Commonwealth of Massachusetts or any other jurisdiction, and where applicable, the laws of the United States, that would result in the
application of the laws of any other jurisdiction. 
 9. Dispute Resolution. 

(a) With respect to disputes and claims hereunder, each of the parties irrevocably submits to the exclusive jurisdiction of any court of
competent jurisdiction sitting in Middlesex County, Massachusetts, for the purposes of any suit, action or other proceeding (a “Legal Action”) arising out of this Agreement, any related agreement or any transaction contemplated
hereby or thereby. Each of the parties hereto further agrees that service of any process, summons, notice or document by U.S. registered mail to such party’s respective address set forth or described in Section 7 shall be effective
service of process for any action, suit or proceeding in any court of competent jurisdiction sitting in Middlesex Country, Massachusetts with respect to any matters to which it has submitted to jurisdiction in this Section 9. Each of the
parties hereto irrevocably and unconditionally waives any objection to the laying of venue of any action, suit or proceeding arising out of this Agreement, any related document or the transactions contemplated

  
 5 

 
hereby and thereby in any court of competent jurisdiction sitting in Middlesex County, Massachusetts, and hereby and thereby further irrevocably and unconditionally waives and agrees not to plead
or claim in any such court that any such action, suit or proceeding brought in any such court has been brought in an inconvenient forum. 
 (b) Notwithstanding anything to the contrary herein, prior to Executive initiating any Legal Action to resolve any dispute or claim under this Agreement, Executive shall first notify the Company in
writing of such dispute or claim and, during the thirty (30) days after receipt of such notice, the Company shall be entitled to request such dispute or claim be submitted to a mediation proceeding between the parties hereto in Middlesex
County, Massachusetts (or another location agreed to by the parties hereto) prior to initiation of any Legal Action. If (i) the Company elects to engage in a mediation proceeding and (ii) the parties hereto use commercially reasonable
efforts to timely resolve the dispute or claim through mediation and have not agreed in writing to a resolution of such dispute or claim pursuant to the mediation within forty-five (45) days after the commencement thereof, then Executive shall,
subject to Section 9(a), be entitled to initiate Legal Action with respect to such claim or dispute. Each party hereto shall bear its own costs and expenses incurred in connection with the mediation, and all costs and expenses of the
mediation proceeding shall be borne equally by the parties hereto. 
 (c) As a specifically bargained for inducement for each of
the parties hereto to enter into this Agreement (after having the opportunity to consult with counsel), each party hereto expressly waives the right to trial by jury in any lawsuit or proceeding relating to or arising in any way from this Agreement
or the matters contemplated hereby. 
 10. Entire Agreement. The terms of this Agreement (together with any other agreements and
instruments contemplated hereby or referred to herein) are intended by the parties hereto to be the final expression of their agreement with respect to the subject matter described herein (including, without limitation, any obligation of the Company
or its subsidiaries to make severance payments or provide severance benefits to Executive under any other agreement or arrangement) and supersede (and may not be contradicted by evidence of) any prior or contemporaneous agreements or arrangements
between the parties hereto regarding the subject matter described herein (including, without limitation, that certain offer letter by and between the Company and Executive, dated as of June 23, 2011). The parties hereto further intend that this
Agreement shall constitute the complete and exclusive statement of its terms and that no extrinsic evidence whatsoever may be introduced in any judicial, administrative, or other legal proceeding to vary the terms of this Agreement. Nothing in this
Agreement shall confer upon Executive any right to continue in the employ or service of the Company or any subsidiary thereof or shall interfere with or restrict in any way the rights of the Company and its subsidiaries, which rights are hereby
expressly reserved, to discharge or terminate the services of Executive at any time for any reason whatsoever, with or without Cause. 
 11.
Amendments; Waivers. This Agreement may not be modified, amended, or terminated except by an instrument in writing, signed by Executive and a duly authorized officer of the Company and approved by the Board, which expressly identifies the
amended provision of this Agreement. By an instrument in writing similarly executed and approved by the Board, Executive or a duly authorized officer of the Company may waive compliance by the other party or parties hereto with any provision of this
Agreement that such other party was or is obligated to comply with or perform; provided, however, that such waiver shall not operate as a waiver of, or estoppel with respect to, any other or subsequent failure to comply or perform. No
failure to exercise and no delay in exercising any right, remedy, or power hereunder shall preclude any other or further exercise of any other right, remedy, or power provided herein or by law or in equity. 

  
 6 

 12. No Inconsistent Actions. The parties hereto shall not voluntarily undertake or fail to undertake
any action or course of action inconsistent with the provisions or essential intent of this Agreement. Furthermore, it is the intent of the parties hereto to act in a fair and reasonable manner with respect to the interpretation and application of
the provisions of this Agreement. 
 13. Enforcement. If any provision of this Agreement is held to be illegal, invalid or unenforceable
under present or future laws effective during the term of this Agreement, such provision shall be fully severable; this Agreement shall be construed and enforced as if such illegal, invalid or unenforceable provision had never comprised a portion of
this Agreement; and the remaining provisions of this Agreement shall remain in full force and effect and shall not be affected by the illegal, invalid or unenforceable provision or by its severance from this Agreement. Furthermore, in lieu of such
illegal, invalid or unenforceable provision there shall be added automatically as part of this Agreement a provision as similar in terms to such illegal, invalid or unenforceable provision as may be possible and be legal, valid and enforceable.

 14. Withholding. The Company shall be entitled to withhold from any amounts payable under this Agreement, any federal, state, local or
foreign withholding or other taxes or charges which the Company is required to withhold. The Company shall be entitled to rely on an opinion of counsel if any questions as to the amount or requirement of withholding shall arise. 

15. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed to be an original but all of which
together will constitute one and the same agreement. 
 16. Section 409A. 

(a) General. The parties hereto acknowledge and agree that, to the extent applicable, this Agreement shall be interpreted in
accordance with, and incorporate the terms and conditions required by, Section 409A. Notwithstanding any provision of this Agreement to the contrary, in the event that the Company determines that any amounts payable hereunder will be
immediately taxable to Executive under Section 409A, the Company reserves the right (without any obligation to do so or to indemnify Executive for failure to do so) to (i) adopt such amendments to this Agreement and appropriate policies
and procedures, including amendments and policies with retroactive effect, that the Company determines to be necessary or appropriate to preserve the intended tax treatment of the benefits provided by this Agreement, to preserve the economic
benefits of this Agreement and to avoid less favorable accounting or tax consequences for the Company and/or (ii) take such other actions as the Company determines to be necessary or appropriate to exempt the amounts payable hereunder from
Section 409A or to comply with the requirements of Section 409A and thereby avoid the application of penalty taxes thereunder. No provision of this Agreement shall be interpreted or construed to transfer any liability for failure to comply
with the requirements of Section 409A from Executive or any other individual to the Company or any of its Affiliates, employees or agents. 

  
 7 

 (b) Separation from Service under Section 409A. Notwithstanding any provision to
the contrary in this Agreement: (i) no amount shall be payable pursuant to Section 3 in connection with Executive’s termination of employment with the Company unless the termination of Executive’s employment constitutes a
“separation from service” within the meaning of Section 1.409A-1(h) of the Department of Treasury Regulations; and (ii) for purposes of Section 409A, Executive’s right to receive any installment payments shall be
treated as a right to receive a series of separate and distinct payments. Notwithstanding any provision to the contrary in this Agreement, if Executive is deemed at the time of Executive’s separation from service to be a “specified
employee” for purposes of Section 409A(a)(2)(B)(i) of the Code, to the extent delayed commencement of any portion of the termination benefits to which Executive is entitled under this Agreement is required in order to avoid a prohibited
distribution under Section 409A(a)(2)(B)(i) of the Code, such portion of Executive’s termination benefits shall not be provided to Executive prior to the earlier of (A) the expiration of the six-month period measured from the date of
Executive’s “separation from service” with the Company (as such term is defined in the Treasury Regulations issued under Section 409A of the Code) or (B) the date of Executive’s death; upon the earlier of such dates,
all payments deferred pursuant to this sentence shall be paid in a lump sum to Executive or Executive’s estate, as applicable, and any remaining payments due under the Agreement shall be paid as otherwise provided herein. 

(c) Release. Notwithstanding anything to the contrary in this Agreement, to the extent that any payments of
“nonqualified deferred compensation” (within the meaning of Section 409A) due under this Agreement as a result of Executive’s termination of employment are subject to Executive’s execution and delivery of a Release,
(i) the Company shall deliver the Release to Executive within seven (7) days following the Date of Termination, and (ii) if Executive fails to execute the Release on or prior to the Release Expiration Date (as defined below) or timely
revokes Executive’s acceptance of the Release thereafter, Executive shall not be entitled to any payments or benefits otherwise conditioned on the Release. For purposes of this Section 16(c), “Release Expiration
Date” shall mean the date that is twenty-one (21) days following the date upon which the Company timely delivers the Release to Executive, or, in the event that Executive’s termination of employment is “in connection with an
exit incentive or other employment termination program” (as such phrase is defined in the Age Discrimination in Employment Act of 1967), the date that is forty-five (45) days following such delivery date. To the extent that any payments of
nonqualified deferred compensation (within the meaning of Section 409A) due under this Agreement as a result of Executive’s termination of employment are delayed pursuant to this Section 16(c), such amounts shall be paid in a
lump sum on the first payroll date to occur on or after the 90th day following the date of Executive’s termination of employment, provided that Executive executes and does not revoke the Release prior to such 90th day (and any applicable revocation period has expired). 

[signature page follows] 

  
 8 

 IN WITNESS WHEREOF, the parties have caused this Agreement to be duly executed and delivered
as of the date first above written. 
  

	
	GSI GROUP INC.
	
	/s/ Robert Buckley
	By: Robert Buckley
	Title: Chief Financial Officer

  

	
	Jamie Bader
	
	/s/ Jamie Bader

  

			
	Residence Address:

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