Document:

Backstop Commitment Agreement

 Exhibit 10.2 

EXECUTION COPY 

BACKSTOP COMMITMENT AGREEMENT 

BACKSTOP COMMITMENT AGREEMENT (this “Agreement”), dated as of May 14, 2010, by and among GSI Group Inc., a
company organized under the laws of the Province of New Brunswick, Canada, which, as of the Effective Date (as defined below), shall be renamed Excel Technology, Inc. (the “Company”), and the investors identified on Schedule I
hereto (each, a “Backstop Investor” and, collectively, the “Backstop Investors”). 

RECITALS 

WHEREAS, on November 20, 2009, the Company, MES International, Inc. and GSI Group Corporation (together with the Company, the
“Debtors”) each filed voluntary petitions for relief under chapter 11 of title 11 of the United States Code (as amended, the “Bankruptcy Code”) in the United States Bankruptcy Court for the District of Delaware (the
“Bankruptcy Court”) and the Debtors’ cases are being jointly administered (the “Bankruptcy Cases”); 

WHEREAS, on the date hereof, the Debtors have filed with the Clerk of the Bankruptcy Court the Fourth Modified Joint Chapter 11 Plan of
Reorganization of the Debtors (the “Plan”); 
 WHEREAS, pursuant to the Plan, the Company has agreed to
commence a rights offering (the “Rights Offering”) whereby holders (each a “Holder” and collectively, the “Holders”) of Common Shares of the Company (“Existing Shares”) shall be
granted non-transferable rights (“Rights”) to purchase, on a pro rata basis in proportion to their respective holdings of Existing Shares, up to an aggregate amount of 47,222,222 new Common Shares of the Company (“New Common
Shares”) at a purchase price of $1.80 per share (“Per Share Purchase Price”) payable in cash for aggregate maximum proceeds to the Company of $85.0 million; 

WHEREAS, in order to facilitate the Rights Offering, pursuant to this Agreement, and subject to the terms, conditions and limitations set
forth herein and in consideration of the payment of the Commitment Fee (as defined herein), the Company is willing to sell, and the Backstop Investors are willing to purchase, on the Effective Date, for an aggregate purchase price payable by the
deemed exchange and cancellation of a portion of Senior Note Claims (as defined below) equal to the Per Share Purchase Price, the greater of (i) 11,111,111 New Common Shares (the “Minimum Commitment Shares”) and (ii) the
total number of New Common Shares not purchased by Holders in the Rights Offering (the “Unsubscribed Shares”); and 

WHEREAS, the Company and each Backstop Investor is executing and delivering this Agreement in reliance upon the exemption from securities
registration afforded by Section 1145 of the Bankruptcy Code and applicable Canadian securities laws. 
 NOW,
THEREFORE, in consideration of the premises and of the mutual agreements contained herein, and for other good and valuable consideration the receipt and sufficiency of which is hereby acknowledged, and intending to be legally bound hereby, the
parties hereto agree as follows: 
 Section 1. DEFINITIONS. 

(a) As used in this Agreement, the following terms shall have the following meanings: 

“Addendum” has the meaning assigned to it in Section 10.8. 

 “Affiliate” means, with respect to any specified Person, any other Person
that directly, or indirectly through one or more intermediaries, controls, is controlled by, or is under common control with, such specified Person. 

“Agreement” has the meaning assigned to it in the preamble hereto. 

“Approval Motion” has the meaning assigned to it in Section 5.1. 

“Approval Order” has the meaning assigned to it in Section 5.1. 

“Assumption Agreement” has the meaning assigned to it in Section 10.8. 

“Backstop Commitment” means the commitment of each Backstop Investor to acquire the number of New Common Shares equal to
the product of (i) each such Backup Investor’s Backstop Percentage and (ii) the greater of (A) the Minimum Commitment Shares and (B) the Unsubscribed Shares. 

“Backstop Investor” has the meaning assigned to it in the preamble hereto. 

“Backstop Investor Default” has the meaning assigned to it in Section 8(b)(i). 

“Backstop Investor Material Adverse Effect” means any event, circumstance, development, change or effect that,
individually or in the aggregate with all other events, circumstances, developments, changes or effects, has or would reasonably be expected to prevent, materially delay or materially impair the ability of a Backstop Investor to consummate the
transactions contemplated hereby. 
 “Backstop Percentage” means, at any time of determination, with respect to
any Backstop Investor, the percentage set forth opposite the name of such Backstop Investor under the heading “Backstop Percentage” on Schedule I hereto (as such Schedule I may be updated pursuant to Section 10.8
hereof). 
 “Backstop Purchase Price” means, with respect to any Backstop Investor, such Backstop
Investor’s Backstop Percentage of the product of the (i) Per Share Purchase Price and (ii) the greater of (A) the Minimum Commitment Shares and (B) the Unsubscribed Shares. 

“Backstop Shares” has the meaning assigned to it in Section 2.2(a). 

“Bankruptcy Cases” has the meaning assigned to it in the recitals hereto. 

“Bankruptcy Code” means title 11 of the United States Code, as amended from time to time. 

 

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 “Bankruptcy Court” has the meaning assigned to it in the recitals hereto.

 “Business Day” any day that is not a Saturday, a Sunday or other day on which banks are required or
authorized by Law to be closed in the City of New York. 
 “Closing” has the meaning assigned to it in
Section 2.2(b). 
 “Commitment Fee” means for each Backstop Investor a fee equal to 5% of the
product of (i) such Backstop Investor’s Backstop Percentage and (ii) $85 million. 
 “Company”
has the meaning assigned to it in the preamble hereto. 
 “Company Material Adverse Effect” means any event,
circumstance, development, change or effect that, individually or in the aggregate with all other events, circumstances, developments, changes or effects, (a) has had or would reasonably be expected to have or result in a material adverse
effect or change in the results of operations, properties, assets, liabilities or condition (financial or otherwise) of the Company and its Subsidiaries taken as a whole or (b) has or would reasonably be expected to prevent, materially delay or
materially impair the ability of the Company to consummate the Rights Offering and the transactions contemplated hereby. 

“Confirmation Order” means the Order of the Bankruptcy Court confirming the Plan. 

“Contracts” means any contract, arrangement, note, bond, commitment, purchase order, sales order, franchise, guarantee,
indemnity, indenture, instrument, lease, license or other agreement, understanding, instrument or obligation, whether written or oral, all amendments, supplements and modifications of or for any of the foregoing and all rights and interests arising
thereunder or in connection therewith. 
 “control” (including the terms “controlled by” and
“under common control with”), with respect to the relationship between or among two or more Persons, means the possession, directly or indirectly or as trustee, personal representative or executor, of the power to direct or cause
the direction of the affairs, policies or management of a Person, whether through the ownership of voting securities, as trustee, personal representative or executor, by Contract, credit arrangement or otherwise. 

“Debtors” has the meaning assigned to it in the recitals hereto. 

“Defaulting Backstop Investor” has the meaning assigned to it in Section 8(b)(i). 

“Default Purchase Right” has the meaning assigned to it in Section 8(b)(i). 

“Default Shares” has the meaning assigned to it in Section 8(b)(i). 

“DTC” has the meaning assigned to it in Section 2.2(b). 

“Effective Date” has the meaning assigned to it in the Plan. 

 

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 “Encumbrance” means any security interest, pledge, mortgage, lien, claim,
option, charge or encumbrance. 
 “Exchange Act” means the Securities Exchange Act of 1934, as amended from
time to time, and the rules and regulations promulgated thereunder, or any successor statute. 
 “Exculpated
Claims” has the meaning assigned to it in Section 9(b). 
 “Exculpated Parties” has the
meaning assigned to it in Section 9(b). 
 “Existing Shares” has the meaning assigned to it in the
recitals hereto. 
 “Governmental Authority” means any federal, national, supranational, foreign, state,
provincial, local, county, municipal or other government, any governmental, regulatory or administrative authority, agency, department, bureau, board, commission or official or any quasi-governmental or private body exercising any regulatory,
taxing, importing or other governmental or quasi-governmental authority, or any court, tribunal, judicial or arbitral body, or any Self-Regulatory Organization. 

“Holder” has the meaning assigned to it in the recitals hereto. 

“Indemnitees” has the meaning assigned to it in Section 9(a). 

“Law” means any federal, national, supranational, foreign, state, provincial, local, county, municipal or similar
statute, law, common law, writ, injunction, decree, guideline, policy, ordinance, regulation, rule, code, Order, constitution, treaty, requirement, judgment or judicial or administrative doctrines enacted, promulgated, issued, enforced or entered by
any Governmental Authority. 
 “Losses” has the meaning assigned to it in Section 9(a) hereof.

 “Milestone” has the meaning assigned to it in Section 5.6. 

“Milestone Dates” has the meaning assigned to it in Section 5.6. 

“Minimum Commitment Shares” has the meaning assigned to it in the recitals hereto. 

“New Common Shares” has the meaning assigned to it in the recitals hereto. 

“Non-Defaulting Backstop Investors” has the meaning assigned to it in Section 8(b)(i). 

“Order” means any order, writ, judgment, injunction, decree, rule, ruling, directive, stipulation, determination or
award made, issued or entered by or with any Governmental Authority, whether preliminary, interlocutory or final. 

“Per Share Purchase Price” has the meaning assigned to it in the recitals hereto. 

 

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 “Person” means any individual, partnership, firm, corporation, limited
liability company, association, joint venture, trust, Governmental Authority, first nation, aboriginal or native group or band, unincorporated organization or other entity, as well as any syndicate or group that would be deemed to be a person under
Section 13(d)(3) of the Exchange Act. 
 “Plan” has the meaning assigned to it in the recitals hereto.

 “Plan Support Agreement” means that certain Restructuring Plan Support Agreement, made and entered into as
of May 14, 2010, by and among (i) the Debtors, (ii) the Equity Committee (as defined therein), (iii) each of the members of the Equity Committee listed therein and (iv) the Backstop Investors. 

“Required Backstop Investors” means, as of any date of determination, Backstop Investors holding at least 60% of the
Senior Note Claims held by all Backstop Investors as of such date. 
 “Rights” has the meaning assigned to it
in the recitals hereto. 
 “Rights Offering” has the meaning assigned to it in the recitals hereto. 

“Rights Offering Packet” has the meaning assigned to it in the Plan. 

“Schulte Roth” has the meaning assigned to it in Section 10.8. 

“Securities Act” means the Securities Act of 1933, as amended from time to time, and the rules and regulations
promulgated thereunder, or any successor statute. 
 “Self-Regulatory Organization” means the any securities
exchange, futures exchange, contract market, any other exchange or corporation or similar self-regulatory body or organization applicable to a party to this Agreement. 

“Senior Note Claims” has the meaning assigned to such term in the Plan Support Agreement. 

“Senior Notes” has the meaning assigned to such term in the Plan Support Agreement. 

“Senior Notes Indenture” has the meaning assigned to such term in the Plan. 

“Subscription Commencement Date” has the meaning assigned to it in Section 2.1(a). 

“Subscription Expiration Date” has the meaning assigned to it in Section 2.1(a). 

“Subsidiaries” of any Person means any corporation, partnership, joint venture, limited liability company, trust, estate
or other Person of which (or in which), directly or indirectly, more than 50% of (a) the issued and outstanding capital stock having ordinary voting power to elect a majority of the board of directors of such corporation (irrespective of
whether at 
  

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the time capital stock of any other class or classes of such corporation shall or might have voting power upon the occurrence of any contingency), (b) the interest in the capital or profits
of such partnership, joint venture or limited liability company or other Person or (c) the beneficial interest in such trust or estate is at the time owned by such first Person, or by such first Person and one or more of its other Subsidiaries
or by one or more of such Person’s other Subsidiaries. 
 “Unsubscribed Shares” has the meaning assigned
to it in the recitals hereto. 
 Section 2. RIGHTS OFFERING; BACKSTOP; COMMITMENT FEE.  

2.1. Rights Offering. 

(a) The Company shall commence the Rights Offering on or before June 4, 2010 (as such date may be extended pursuant
to Section 5.6, the “Subscription Commencement Date”) and the Rights Offering shall remain open until no later than 5:00 p.m., New York City time, on July 15, 2010 (as such date may be extended pursuant to
Section 5.6, the “Subscription Expiration Date”). The Rights Offering shall be conducted and consummated on the terms, subject to the conditions and in accordance with the Rights Offering Packet. 

(b) The Company hereby agrees and undertakes to give, or to cause to be given, to the Backstop Investors as soon as
reasonably practicable, but in no event later than two (2) Business Days, after the Subscription Expiration Date, by overnight mail, e-mail or by electronic facsimile transmission, (i) written notification setting forth (A) the total
number of New Common Shares purchased by Holders in the Rights Offering pursuant to the exercise of Rights and the aggregate cash proceeds received by the Company therefor, (B) the number of Unsubscribed Shares, (C) the Backstop Purchase
Price for each Backstop Investor and (D) the targeted Effective Date and (ii) a subscription form to be completed by each Backstop Investor to facilitate such Backstop Investor’s subscription for the New Common Shares purchased
pursuant to this Agreement. The written notification and subscription form described herein shall be substantially in the form included in the Rights Offering Packet. In addition, on the first Business Day of each calendar week during the period
beginning on the Subscription Commencement Date and ending on the Subscription Expiration Date, the Company shall give, or cause to be given, to the Backstop Investors by overnight mail, e-mail or by electronic facsimile transmission a written
notification setting forth the then most current information as to the total amount of New Common Shares then subscribed for in the Rights Offering, the number of then unsubscribed New Common Shares, the Backstop Purchase Price for each Backstop
Investor (as if the Rights Offering were to be concluded with the then current amount of subscribed for New Common Shares) and the targeted Effective Date. 

2.2. Backstop. 

(a) On the terms and subject to the conditions contained herein, and in reliance on the representations and warranties set
forth in this Agreement, each of the Backstop Investors hereby agrees, severally and not jointly, to purchase on the Effective Date, and the Company hereby agrees to sell and issue to each such Backstop Investor, at the Backstop Purchase Price
therefor, its Backstop Percentage of the greater of (i) the Minimum Commitment Shares and (ii) the Unsubscribed Shares. The New Common Shares which each of the Backstop 

 

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Investors is required to purchase pursuant to this Section 2.2(a) are referred to herein as such Backstop Investor’s “Backstop Shares.” The Backstop Investors
will purchase such New Common Shares by exchanging the principal amount of New Senior Notes equal to such Backstop Investor’s Backstop Purchase Price. 

(b) The closing of the purchase and sale of the Backstop Shares hereunder (the “Closing”) will occur on
the Effective Date contemporaneously with substantial consummation of the Plan. At the Closing, (i) unless the Company and the Required Backstop Investors mutually agree otherwise, payment for the Backstop Shares that each Backstop Investor has
agreed to purchase shall be effected by each such Backstop Investor electronically delivering for cancellation the requisite Senior Notes to the balance account with the Depository Trust Company (“DTC”) designated in writing by the
Company to the Backstop Investors prior to the Closing and (ii) the Company shall cause its transfer agent to credit the aggregate number of Backstop Shares to which such Backstop Investor is entitled to such Backstop Investor’s or its
designee’s balance account with the DTC through its Deposit/Withdrawal at Custodian system and deliver to each Backstop Investor such certificates, documents or instruments required to be delivered by it to such Backstop Investor pursuant to
this Agreement. The agreements, instruments, certificates and other documents to be delivered on the Effective Date by or on behalf of the Company shall be delivered to each applicable Backstop Investor in accordance with Section 10.3
hereof. 
 2.3. Commitment Fee. 

(a) The Commitment Fee shall be earned upon the entry of the Confirmation Order by the Bankruptcy Court. 

(b) On the earliest to occur of (i) substantial consummation of the Plan on the Effective Date, and (ii) two
(2) Business Days after the termination of this Agreement pursuant to the terms of Section 8 hereof (other than Section 8(b)), the Company shall pay to each Backstop Investor, by wire transfer in immediately available
funds to an account specified by such Backstop Investor to the Company not less than one (1) day prior to the applicable payment date, such Backstop Investor’s pro rata portion of the Commitment Fee based on such Backstop Investor’s
Backstop Percentage. 
 Section 3. REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The Company hereby represents
and warrants to each of the Backstop Investors as of the date hereof and as of the Effective Date (except for representations and warranties that are made as of a specific date, which are made only as of such date) as follows: 

3.1. Organization and Qualification; Subsidiaries. The Company has been duly organized and is validly existing and, to the extent
legally applicable, in good standing under the laws of their respective jurisdictions of organization, with the requisite power and authority to own its properties and conduct its business as currently conducted. 

3.2. Authorization; Enforcement; Validity. Subject only to Bankruptcy Court approval, the Company has all necessary corporate
power and authority to enter into this Agreement and to carry out its obligations hereunder (including, without limitation (x) the 

 

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issuance of the Backstop Shares and (y) the payment of the Commitment Fee) in accordance with the terms hereof. The execution and delivery by the Company of this Agreement, the performance
by the Company of its obligations hereunder (including, without limitation, (x) the issuance of the Backstop Shares and (y) the payment of the Commitment Fee), have been duly authorized by all requisite action on the part of the Company,
and no other action on the part of the Company is necessary to authorize the execution and delivery by the Company of this Agreement or the consummation of the transactions contemplated by this Agreement. This Agreement has been duly executed and
delivered by the Company, and assuming due authorization, execution and delivery by the other parties hereto and subject to Bankruptcy Court approval, this Agreement constitutes the legal, valid and binding obligation of the Company, enforceable
against the Company in accordance with its terms, subject to bankruptcy, insolvency, reorganization, moratorium or similar Laws now or hereafter in effect relating to creditors’ rights generally and subject to general principles of equity.

 3.3. No Conflicts. Assuming that all consents, approvals, authorizations and other actions described in
Section 3.4 have been obtained, and except as may result from any facts or circumstances relating solely to any of the Backstop Investors, the execution, delivery and performance by the Company of this Agreement and the consummation of
the transactions contemplated hereby (including, without limitation, (x) the issuance of the Backstop Shares and (y) the payment of the Commitment Fee) do not and will not: (a) violate, conflict with or result in the breach of the
certificate of incorporation, articles of incorporation, bylaws, certificate of formation, operating agreement, limited liability company agreement or similar formation or organizational documents of the Company or any of its Subsidiaries;
(b) conflict with or violate any Law or Order applicable to the Company, any of its Subsidiaries or any of their respective assets or properties; (c) except for conflicts with terms of the Senior Notes Indenture, violate, conflict with,
result in any breach of, constitute a default (or event which with the giving of notice or lapse of time, or both, would become a default) under, require any consent under, or give to others any rights of termination, amendment, acceleration,
suspension, revocation or cancellation of, any note, bond, mortgage or indenture, Contract, agreement, lease, sublease, license, permit, franchise or other instrument or arrangement to which the Company or any of its Subsidiaries is a party or to
which any of their respective assets or properties are subject, or result in the creation of any Encumbrance on any of their respective assets or properties, except, in the case of clauses (b) and (c), for any such conflict, violation, breach
or default that would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect. 
 3.4.
Consents and Approvals. The execution, delivery and performance by the Company of this Agreement do not require any consent, approval, authorization or other Order of, action by, filing with or notification to, any Governmental Authority or
any other Person under any of the terms, conditions or provisions of any Law or Order applicable to the Company or any of its Subsidiaries or by which any of their respective assets or properties may be bound, any Contract to which the Company or
any of its Subsidiaries is a party or by which the Company or any of its Subsidiaries may be bound, except (a) the entry of the Approval Order and the Confirmation Order and the expiration, or waiver by the Bankruptcy Court, of the fourteen
(14) day period set forth in Bankruptcy Rules 6004(h) and 3020(e), as applicable, and (b) where the failure to obtain such consent, approval, authorization, Order or action, or to make such filing or notification, would not reasonably be
expected to have, individually or in the aggregate, a Company Material Adverse Effect. 
  

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 Section 4. REPRESENTATIONS AND WARRANTIES OF THE BACKSTOP INVESTORS. Each
Backstop Investor represents and warrants, severally and not jointly, to the Company as of the date hereof and as of the Effective Date (except for representations and warranties that are made as of a specific date, which are made only as of such
date), as follows: 
 4.1. Authorization; Enforcement; Validity. Such Backstop Investor has all necessary corporate,
limited liability company or equivalent power and authority to enter into this Agreement and to carry out its obligations hereunder in accordance with the terms hereof. The execution and delivery by such Backstop Investor of this Agreement and the
performance by such Backstop Investor of its obligations hereunder have been duly authorized by all requisite action on the part of the such Backstop Investor, and no other action on the part of such Backstop Investor is necessary to authorize the
execution and delivery by such Backstop Investor of this Agreement or the consummation of the transactions contemplated by this Agreement. This Agreement has been duly executed and delivered by such Backstop Investor, and assuming due authorization,
execution and delivery by the other parties hereto, this Agreement constitutes the legal, valid and binding obligation of such Backstop Investor, enforceable against such Backstop Investor in accordance with its terms, subject to bankruptcy,
insolvency, reorganization, moratorium or similar Laws now or hereafter in effect relating to creditors’ rights generally and subject to general principles of equity. 

4.2. No Conflicts. The execution, delivery, and performance by such Backstop Investor of this Agreement do not and will not
(i) violate any provision of the organizational documents of such Backstop Investor; (b) conflict with or violate any Law or Order applicable to such Backstop Investor or any of its respective assets or properties; (c) violate,
conflict with, result in any breach of, constitute a default (or event which with the giving of notice or lapse of time, or both, would become a default) under, require any consent under, or give to others any rights of termination, amendment,
acceleration, suspension, revocation or cancellation of, any note, bond, mortgage or indenture, Contract, agreement, lease, sublease, license, permit, franchise or other instrument or arrangement to which such Backstop Investor is a party or to
which any of its assets or properties are subject, or result in the creation of any Encumbrance on any of its assets or properties, except, in the case of clauses (b) and (c), for any such conflict, violation, breach or default that would not
reasonably be expected to have, individually or in the aggregate, a Backstop Investor Material Adverse Effect on such Backstop Investor. 

4.3. Consents and Approvals. No consent, approval, order, authorization, registration or qualification of or with any court or
Governmental Authority or body having jurisdiction over such Backstop Investor is required in connection with the execution and delivery of this Agreement or the consummation of the transactions contemplated hereby, except for any consent,
approval, order or authorization required under the Bankruptcy Code. 
 4.4. Senior Notes. Each Backstop Investor is the
beneficial owner (with the power and authority to vote and dispose of) of the Senior Notes beneficially owned by such Backstop Investor and specified opposite such Backstop Investor’s name on Schedule I hereto (as may be subsequently
revised pursuant to Section 10.8), free and clear of all liens. 
  

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 4.5. Additional Accredited Representations and Warranties. If a Backstop Investor
purchases New Common Shares for cash and the exemption from securities registration afforded by Section 1145 of the Bankruptcy Code is not available, such Backstop Investor’s representations and warranties shall also include the following:

 (a) Acquisition for Investment. The Backstop Shares to be issued under this Agreement are being
acquired by such Backstop Investor for its own account and not with a view toward resale in connection with the public sale or distribution thereof, except pursuant to sales or transfers registered or exempted within the meaning of the Securities
Act; provided, however, that by making the representations and warranties herein, such Backstop Investor does not agree to hold any of the Backstop Shares for any minimum or other specific term and reserves the right to dispose of the
Backstop Shares at any time in accordance with or pursuant to a registration statement or an exemption under the Securities Act. Such Backstop Investor is acquiring the Backstop Shares hereunder in the ordinary course of its business. Such Backstop
Investor does not presently have any agreement or understanding, directly or indirectly, with any Person to distribute any of the Backstop Shares. 

(b) Business Acumen; Risk of Loss. By reason of its business and financial experience and the business and
financial experience of those persons it has retained for advice with respect to its investment in the New Common Shares, the Backstop Investor, together with its advisors, have such knowledge, sophistication and experience in business and financial
matters that the Backstop Investor is capable of evaluating the merits and risks of investing in the New Common Shares, is able to bear the economic risk of such investment, and, at the present time, could afford a complete loss of such investment.

 (c) Accredited Investor Status. Such Backstop Investor is an “accredited investor” as that
term is defined in Rule 501(a) of Regulation D of the Securities Act. 
 (d) No Governmental Review. Such
Backstop Investor understands that no United States federal or state agency or any other government or governmental agency has passed on or made any recommendation or endorsement of the Backstop Shares or the fairness or suitability of the
investment in the Backstop Shares nor have such authorities passed upon or endorsed the merits of the offering of the Backstop Shares. 

(e) Restricted Shares. The Backstop Investor understands that the New Common Shares will be issued without
registration under the Securities Act of 1933 as amended (the “Act”) in reliance upon an exemption therefrom which is dependent upon the intent hereby expressed. The Backstop Investor further agrees that a restrictive legend regarding the
restrictive status of such New Common Shares may be affixed to the certificates representing the New Common Shares and to all certificates issued hereafter representing any or all of the New Common Shares until in the opinion of counsel, which
opinion must be reasonably satisfactory to the Company and its counsel, such legend is no longer required. 
 Section 5.
ADDITIONAL COVENANTS. 
 5.1. Approval Motion and Approval Order. The Company agrees to file a motion and
supporting papers (the “Approval Motion”) (including an order in form and substance satisfactory to the Backstop Investors) seeking an order of the Bankruptcy Court (the “Approval Order”) approving the Plan Support
Agreement, to which this Agreement will be annexed. 
  

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 5.2. Best Efforts. Each of the Backstop Investors and, subject to its fiduciary
duties as debtor in possession based upon advice of counsel, the Company, agree to use its best efforts to timely satisfy each of the conditions to be satisfied by it as provided in Sections 6 and 7 of this Agreement. 

5.3. Further Assurances. Each party hereto shall do and perform, or cause to be done and performed, all such further acts and
things, and shall execute and deliver all such other agreements, certificates, instruments and documents, as any other party hereto may reasonably request in order to carry out the intent and accomplish the purposes of this Agreement and the
consummation of the transactions contemplated hereby. 
 5.4. Use of Proceeds. The Company shall use the net proceeds
from the sale of New Common Shares issued pursuant to the Rights Offering solely as provided in the Plan. 
 5.5. Taxes.
The Company will pay, and save and hold each Backstop Investor harmless from any and all liabilities (including interest and penalties) with respect to, or resulting from any delay or failure in paying, stamp and other taxes (other than income
taxes), if any, which may be payable or determined to be payable on the execution and delivery or acquisition of the Backstop Shares hereunder. 

5.6. Milestones. The Company will cause the following actions (each, individually a “Milestone” and collectively,
the “Milestones”) to occur on or before the dates specified below (such corresponding date, the “Milestone Date”); provided, however, upon the written request of the Company, which request shall be
accompanied by a certificate of the Chief Restructuring Officer of the Company certifying that the Company is not pursuing an Alternate Transaction (as such term is defined in the Plan Support Agreement), any of the Milestone Dates set forth below
may be extended with the prior written consent of the Required Backstop Investors, such consent not to be unreasonably withheld; provided, that the aggregate number of days that the Milestones set forth below are so extended beyond the
Milestone Dates specified below shall not exceed thirty (30) days in the aggregate for all such Milestone Dates: 

(a) the Approval Order shall have been entered by the Bankruptcy Court by no later than May 21, 2010; 

(b) the Confirmation Order shall have been entered by the Bankruptcy Court by no later than May 28, 2010; 

(c) the Rights Offering shall have been commenced by the Company no later than June 4, 2010; 

(d) the Subscription Expiration Date shall have occurred by no later than July 15, 2010; and 

 

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 (e) the Effective Date shall have occurred by no later than July 23,
2010. 
 For the avoidance of doubt and as an example, if the Milestone Date in clause (a) above is permissibly extended
pursuant hereto to May 31, 2010 and the Milestone Date in clause (b) above is permissibly extended pursuant hereto to May 31, 2010, then a total of 13 of the maximum 30 extension days shall have been used. 

5.7. Holding Period. For the purposes of Rule 144 under the Securities Act, the Company acknowledges that the holding period of
the Senior Notes may be tacked onto the holding period of the New Common Shares received by the Backstop Investors pursuant to the Plan, including, without limitation in connection with the Backstop Commitment. The Company agrees not to take a
position contrary to this Section 5.7. 
 Section 6. CONDITIONS TO THE BACKSTOP INVESTORS’
OBLIGATIONS. The obligations of each of the Backstop Investors to purchase the Backstop Shares pursuant to this Agreement on the Effective Date shall be subject to the satisfaction at or prior to the Effective Date of each of the following
conditions, any one or more of which may be waived in writing by the Required Backstop Investors: 
 6.1. Representations and
Warranties. (a) All of the representations and warranties made by the Company in this Agreement shall be true and correct as of the Effective Date as though made at and as of the Effective Date (except to the extent such representations and
warranties expressly speak as of an earlier date, which shall be true and correct as of such date), except to the extent that the breach of any such representation or warranty would not reasonably be expected to have a Company Material Adverse
Effect; (b) the Company shall have performed and complied in all material respects with all agreements and covenants required by this Agreement to be performed by the Company on or prior to the Effective Date; and (c) with respect to
clauses (a) and (b), at the Closing there shall be delivered to the Backstop Investors a certificate signed by a duly authorized representative of the Company to the foregoing effect. 

6.2. Approval Order. The Approval Order shall have been entered by the Bankruptcy Court. 

6.3. Confirmation Order. The Confirmation Order shall have been entered by the Bankruptcy Court, shall not have been stayed
pending appeal, and there shall not have been entered by any court of competent jurisdiction any reversal, modification or vacatur, in whole or in part, of the Confirmation Order. 

6.4. Plan and Rights Offering Documents. The (i) Plan (and the exhibits thereto), (ii) the Rights Offering Documents,
and (iii) the Confirmation Order shall each be in form and substance reasonably acceptable to the Required Backstop Investors; provided, however, that the Security Agreement and the New Indenture shall be substantially in the form
filed with the Bankruptcy Court on April 9, 2010 as revised to reflect the principal amount of the New Senior Secured Notes as contemplated by the Plan and elimination of provisions related to the issuance of Preferred Stock as such term is
defined in the Indenture filed with the Bankruptcy Court on April 9, 2010. 
  

 12 

 6.5. Conditions to Confirmation. Each of the conditions precedent to the
effectiveness of the Plan and the occurrence of the Effective Date shall have been satisfied or waived in accordance with the Plan. 

6.6. Rights Offering. The Subscription Expiration Date shall have occurred. 

6.7. Commitment Fee. The Company shall have paid to each Backstop Investor contemporaneously with the Closing, such Backstop
Investor’s pro rata portion of the Commitment Fee. 
 6.8. Milestones. Each of the Milestones set forth in
Section 5.6(a)-(e) shall have occurred on or prior to the applicable Milestone Date (after giving effect to any extensions permitted pursuant to Section 5.6) 

Section 7. CONDITIONS TO THE COMPANY’S OBLIGATIONS. The obligations of Company to issue and sell the Backstop Shares
to each of the Backstop Investors pursuant to this Agreement shall be subject to the satisfaction at or prior to the Effective Date of each of the following conditions, any one or more of which may be waived in writing by the Company: 

7.1. Representations and Warranties. (a) All of the representations and warranties made by each Backstop Investor in this
Agreement shall be true and correct as of the date hereof and as of the Effective Date as though made at and as of the Effective Date (except to the extent such representations and warranties expressly speak as of an earlier date, which shall be
true and correct as of such date), except to the extent that the breach of any such representation or warranty would not reasonably be expected to have a Backstop Investor Material Adverse Effect on such Backstop Investor and (b) each Backstop
Investor shall have performed and complied in all material respects with all agreements and covenants required by this Agreement to be performed by such Backstop Investor on or prior to the Effective Date. 

7.2. Confirmation Order. The Confirmation Order shall have been entered by the Bankruptcy Court, shall not have been stayed
pending appeal, and there shall not have been entered by any court of competent jurisdiction any reversal, modification or vacatur, in whole or in part, of the Confirmation Order. 

7.3. Conditions to Confirmation. Each of the conditions precedent to the effectiveness of the Plan and the occurrence of the
Effective Date shall have been satisfied in accordance with the Plan. 
 7.4. Rights Offering. The Subscription
Expiration Date shall have occurred 
 7.5. Backstop Subscription Forms. The Company shall have received a duly executed
subscription form from each Backstop Investor in accordance with Section 2.1(b). 
  

 13 

 Section 8. TERMINATION. 

(a) Termination by the Backstop Investors. The Agreement may be terminated at any time by the Required Backstop
Investors: 
 (i) upon the failure of any of the conditions set forth in Section 6 (other than
Section 6.8) hereof to be satisfied, which failure cannot be cured by July 23, 2010; 
 (ii) if
any of the Milestones shall not have occurred on or prior to the applicable Milestone Date (after giving effect to any extensions permitted pursuant to Section 5.6); 

(iii) if the Company alters, amends or modifies any term of this Agreement without the consent of the Backstop Investors;
or 
 (iv) upon the entry by the Company into an Alternate Transaction (as such term is defined in the Plan
Support Agreement). 
 (b) Termination by the Company. 

(i) If any Backstop Investor takes any action that would be a breach of this Agreement, other than any breach that would
not reasonably be expected to have a Backstop Investor Material Adverse Effect on such Backstop Investor, and if such breach is not cured within five (5) Business Days after receipt of written notice from the Company to such Backstop Investor
(each, a “Backstop Investor Default” and any such defaulting Backstop Investor, a “Defaulting Backstop Investor”); provided, however, that if such breach is not cured by the Defaulting Backstop
Investor, then following the expiration of the five (5) Business Day notice period, the Company shall follow the procedures set forth in clause (ii) below and each of the other Backstop Investors (the “Non-Defaulting Backstop
Investors”) shall have the right (the “Default Purchase Right”) but not the obligation, to purchase on the Effective Date all or a portion of the Backstop Shares that were to be purchased by the Defaulting Backstop Investor
(the “Default Shares”) at a price per share equal to the Per Share Purchase Price. To the extent that the Non-Defaulting Backstop Investors (in the aggregate) desire to purchase more than the total number of Default Shares, such
Default Shares shall be allocated between the Non-Defaulting Backstop Investors pro rata, based on their respective Backstop Percentages. The purchase price for the Default Shares shall be payable, at the election of each Non-Defaulting Purchaser,
in cash or by cancellation of Senior Notes in accordance with the procedures set forth in Section 2.2(b). 

(ii) As soon as practicable after a Backstop Investor Default, but in no event later than two (2) Business Days
following the Company becoming aware of such Backstop Investor Default, the Company shall send a written notice (in accordance with the notice provisions set forth in Section 10.3) to each Non-Defaulting Backstop Investor, specifying the
number of Default Shares. The Non-Defaulting Backstop Investors shall have five (5) Business Days from receipt of such notice to elect to exercise the Default Purchase Right by notifying the Company of its or their election to purchase all or a
portion of the Default Shares then available as a result of the Backstop Investor Default or find a third-party reasonably satisfactory to the Non-Defaulting Backstop Investors to replace the commitment of the

  

 14 

 
Defaulting Backstop Investor. If at the conclusion of such ten (10) Business Day period, the Non-Defaulting Backstop Investors have not elected to exercise the Default Purchase Right in its
entirety or have not found a third-party to replace the commitment of the Defaulting Backstop Purchaser, then the Company may terminate this Agreement. 

(iii) Notwithstanding anything to the contrary in this Section 8(b), in addition to any liability to the Company, the
parties agree that any Defaulting Backstop Investor will be liable to the Non-Defaulting Backstop Investors for the consequences to the Non-Defaulting Backstop Investors of its breach and that the Non-Defaulting Backstop Purchasers can enforce
rights of damages and/or specific performance pursuant to Section 10.17 immediately upon the expiration of the original five (5) Business Day notice period set forth Section 8(b)(i). 

(iv) Any time periods granted by this Section 8(b) shall automatically extend the Milestone Date set forth in
Section 5.6(e), without using the Company’s permissible extensions provided by Section 5.6. 

(c) Mutual Termination. This Agreement may be terminated by the mutual written consent of the Company and the
Required Backstop Investors. 
 (d) Effect of Termination. If this Agreement is terminated pursuant to
this Section 8 (other than pursuant to Section 8(b)), the obligations of such parties contained in Sections 2.3, 9, 10.2 through 10.18 and this Section 8 shall survive any such
termination. If this Agreement is terminated pursuant to this Section 8(b), the obligations of such parties contained in Sections 10.2 through 10.18 and this Section 8 shall survive any such termination.

 Section 9. INDEMNIFICATION; EXCULPATION 

(a) Indemnification. The Debtors will indemnify, save and hold harmless each Backstop Investor, and each of their
respective directors, officers, stockholders, employees, partners, members, managers, representatives, attorneys, other professional advisors and agents and all of their respective heirs, successors, legal administrators, permitted assigns, and each
Person who (within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act) controls any of the Backstop Investors and the officers, directors, agents and employees of any such controlling Person (collectively,
the “Indemnitees”) from and against all losses, claims, damages, liabilities, costs (including, without limitation, the costs of investigation and reasonable attorneys’ fees) and expenses, as incurred by any or all of the
Indemnitees in connection with any claim against them by a third party in connection with or arising from the execution, delivery and performance by the Debtors or any Indemnitee of this Agreement or the Rights Offering (collectively, the
“Losses”); provided, however, that the foregoing indemnity will not apply to Losses of an Indemnitee to the extent that they are found by a final, non-appealable judgment of a court of competent
jurisdiction to have resulted from: (A) any material breach by any Indemnitee of this Agreement; (B) such Indemnitee’s bad faith, willful or intentional misconduct or gross negligence; or (C) any violation of applicable Law by
such Indemnitee. This indemnification provision will be in addition to the rights of each and all of the Indemnitees to bring an action against the Debtors for breach of any term of this Agreement. The Debtors acknowledge and agree that each and all
of the Indemnitees shall be treated as third-party beneficiaries with rights to bring an action against the Debtors under this Section 9. 
  

 15 

 (b) Exculpation. To the fullest extent permitted by applicable law,
no Debtor shall assert, and each Debtor hereby waives, any claim against the Backstop Investors and each of their respective directors, officers, stockholders, employees, partners, members, managers, representatives, attorneys, other professional
advisors and agents and all of their respective heirs, successors, legal administrators, permitted assigns, and each Person who (within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act) controls any of the
Backstop Investors and the officers, directors, agents and employees of any such controlling Person (collectively, the “Exculpated Parties”), on any theory of liability, for special, indirect, consequential or punitive damages, as
opposed to direct or actual damages (whether or not the claim therefor is based on Contract, tort or duty imposed by any applicable legal requirement) to the extent any such claim arises out of, is in connection with, is a result of, or is in any
way related to, this Agreement or the Rights Offering, and Debtors hereby waive, release and agree not to sue upon any such claim or any such damages, whether or not accrued and whether or not known or suspected to exist in their favor
(collectively, the “Exculpated Claims”); provided, however, that the foregoing exculpation will not apply to Losses to the extent that they are found by a final, non-appealable judgment of a court of
competent jurisdiction to have resulted from: (A) any material breach by any Exculpated Party of this Agreement; (B) any act or failure to act by an Exculpated Party of bad faith, willful or intentional misconduct or gross negligence; or
(C) any violation of applicable law. 
 Section 10. MISCELLANEOUS. 

10.1. Survival. The representations and warranties made in this Agreement will survive the execution and delivery of this
Agreement and the Closing for the length of the applicable statute of limitations with respect thereto. 
 10.2. No Waiver of
Rights. All waivers hereunder must be made in writing, and the failure of any party at any time to require another party’s performance of any obligation under this Agreement shall not affect the right subsequently to require performance of
that obligation. Any waiver of any breach of any provision of this Agreement shall not be construed as a waiver of any continuing or succeeding breach of such provision or a waiver or modification of any other provision. 

10.3. Notices. All notices, requests, claims, demands and other communications hereunder shall be in writing and shall be given or
made (and shall be deemed to have been duly given or made upon receipt) by delivery in person, by an internationally recognized overnight courier service, by facsimile or registered or certified mail (postage prepaid, return receipt requested) to
the respective parties hereto at the following addresses (or at such other address for any party as shall be specified by such party in a notice given in accordance with this Section 10.3) 

 

 16 

	 	(a)	If to the Company, to: 

 GSI
Group Inc. 
 125 Middlesex Turnpike 

Bedford, MA 01730 

Attention: 

Facsimile: 

with a copy (which shall not constitute notice to the Company) to 

Brown Rudnick LLP 

One Financial Center 

Boston, Massachusetts 02111 

Facsimile: (617) 856-8201 

Attention: William R. Baldiga, Esq. 
  

	 	(b)	If to a Backstop Investor, to the mailing address or facsimile number set forth on Schedule I hereto. 

with a copy (which shall not constitute notice to such Backstop Investor) to: 

Schulte Roth & Zabel 

919 Third Avenue 

New York, New York 10022 

Facsimile: (212) 593-5955 

Attention: David M. Hillman, Esq. 

                  Lawrence V. Gelber, Esq.

                   Eleazer N. Klein,
Esq. 
 Any of the foregoing addresses or facsimile numbers may be changed by giving notice of such change in the foregoing manner, except that
notices for changes of address or facsimile number shall be effective only upon receipt. 
 10.4. Headings. The section
and subsection headings in this Agreement are inserted for convenience only and shall not affect in any way the meaning or interpretation of this Agreement. 

10.5. Construction. The parties hereto and their respective legal counsel participated in the preparation of this Agreement, and
therefore, this Agreement shall be construed neither against nor in favor of any of the parties hereto, but rather in accordance with the fair meaning thereof. 
  

 17 

 10.6. Severability. If any term or other provision of this Agreement is invalid,
illegal or incapable of being enforced by any Law or public policy, all other terms and provisions of this Agreement shall nevertheless remain in full force and effect for so long as the economic or legal substance of the transactions contemplated
hereby is not affected in any manner materially adverse to any party hereto. Upon such determination that any term or other provision is invalid, illegal or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this
Agreement so as to effect the original intent of the parties as closely as possible in an acceptable manner in order that the transactions contemplated hereby are consummated as originally contemplated to the greatest extent possible. 

10.7. Entire Agreement. This Agreement (including the Schedules and Exhibits hereto) and the agreements and documents referenced
herein constitute the entire agreement of the parties hereto with respect to the subject matter hereof and supersede all prior agreements and undertakings, both written and oral, among the parties hereto with respect to the subject matter hereof.

 10.8. Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the parties hereto and
their respective successors and permitted assigns. Except as set forth below, neither this Agreement nor any of the rights, interests or obligations under this Agreement will be assigned by any party (whether by operation of law or otherwise)
without the prior written consent of the other parties. The rights, obligations and interests hereunder may be assigned, delegated or transferred, in whole or in part, by any Backstop Investor in connection with a corresponding Transfer (as such
term is defined in the Plan Support Agreement) of Senior Notes or Senior Note Claims to a Transferee (as such term is defined in the Plan Support Agreement); provided, however, that (A) following such Transfer, the transferring
Backstop Investor continues to hold a sufficient amount of Senior Note Claims so as to be able to meet its obligations under this Agreement or (B) the Transferee, as a condition precedent to such Transfer, becomes a party to this Agreement and
assumes the obligations of the transferring Backstop Investor under this Agreement by executing an addendum substantially in the form set forth in Exhibit A (the “Addendum”) and an assumption in substantially the form set
forth in Exhibit B hereto (the “Assumption Agreement”) and deliver the same to Schulte Roth & Zabel LLP (“Schulte Roth”), counsel for the Backstop Investors, and a copy to the Company. Any Transfer
that is made in violation of the immediately preceding sentence shall be null and void ab initio, and the Company and each Backstop Investor, as applicable, shall have the right to enforce the voiding of such transfer. Any additional Senior Notes
acquired by a Backstop Investor shall automatically be deemed to be subject to the terms of this Agreement. Following any assignment of a Backstop Investor’s rights and obligations in this Agreement described in Section 10.8(B)
above, Schedule I hereto shall be updated by Schulte Roth (in consultation with the assigning Backstop Investor and the Transferee) and delivered to the Company solely to reflect the name and address of the applicable Transferee or
Transferees, the Senior Note Claims and the Backstop Percentage that shall apply to such Transferee or Transferees, and any changes to the Senior Note Claims and the Backstop Percentage applicable to the assigning Backstop Investor. Any update to
Schedule I hereto described in the immediately preceding sentence shall not be deemed an amendment or modification of this Agreement. In performing this Agreement, the Company may rely solely on the most current Schedule I delivered by
Schulte Roth. 
 10.9. No Third Party Beneficiaries. This Agreement shall be binding upon and inure solely to the benefit
of the parties hereto and their respective successors and permitted assigns and, except as expressly set forth in Section 9, nothing herein, express or implied, is intended to or shall confer upon any other Person any legal or equitable
right, benefit or remedy of any nature whatsoever, including any rights of employment for any specified period, under or by reason of this Agreement. 
  

 18 

 10.10. Amendment. This Agreement may not be altered, amended, or modified except by a
written instrument executed by or on behalf of the Company and the Required Backstop Investors. This Agreement shall become binding only after the same is signed and delivered by or on behalf of each of the parties hereto. 

10.11. Governing Law. This Agreement shall be interpreted, construed and enforced in accordance with the laws of the State of New
York, without regard to the conflicts of law principles thereof. 
 10.12. Consent to Jurisdiction. Each of the parties
hereto (a) irrevocably and unconditionally agrees that any actions, suits or proceedings, at Law or equity, arising out of or relating to this Agreement or any agreements or transactions contemplated hereby shall be heard and determined in the
Bankruptcy Court; (b) irrevocably submits to the jurisdiction of such court in any such action, suit or proceeding; (c) consents that any such action, suit or proceeding may be brought in such courts and waives any objection that such
party may now or hereafter have to the venue or jurisdiction or that such action or proceeding was brought in an inconvenient court; and (d) agrees that service of process in any such action, suit or proceeding may be effected by providing a
copy thereof by any of the methods of delivery permitted by Section 10.3 to such party at its address as provided in Section 10.3 (provided that nothing herein shall affect the right to effect service of process in any other
manner permitted by Law). 
 10.13. Waiver of Jury Trial. EACH OF THE PARTIES HERETO HEREBY WAIVES TO THE FULLEST EXTENT
PERMITTED BY APPLICABLE LAW ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY WITH RESPECT TO ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT OR THE TRANSACTIONS. EACH OF THE PARTIES HERETO HEREBY
(A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF THE OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT
IT HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT AND THE TRANSACTIONS, AS APPLICABLE, BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 10.13. 

10.14. Currency. Unless otherwise specified in this Agreement, all references to currency, monetary values and dollars set forth
herein shall mean United States (U.S.) dollars and all payments hereunder shall be made in United States dollars. 
 10.15.
Approvals. Notwithstanding anything to the contrary herein, unless notified in writing to the contrary, for purposes of seeking approvals of the Backstop Investors hereunder, such as in accordance with Section 6.4, the Company may
rely on the written approval (including email) of Schulte Roth, counsel for the Backstop Investors. 
  

 19 

 10.16. Counterparts. This Agreement may be executed and delivered (including by
facsimile transmission) in one or more counterparts, and by the different parties hereto in separate counterparts, each of which when executed shall be deemed to be an original, but all of which taken together shall constitute one and the same
agreement. 
 10.17. Specific Performance. Each party hereto acknowledges that, in view of the uniqueness of the
securities referenced herein and the transactions contemplated by this Agreement, the other parties hereto would not have an adequate remedy at law for money damages in the event that this Agreement has not been performed in accordance with its
terms, and therefore agrees that such other parties shall be entitled to specific enforcement of the terms hereof in addition to any other remedy to which it may be entitled, at law or in equity. 

10.18. Rules of Construction. Unless the context of this Agreement clearly requires otherwise, references to the plural include
the singular, references to the singular include the plural, the term “including” is not limiting, and the term “or” has, except where otherwise indicated, the inclusive meaning represented by the phrase “and/or.” The
words “hereof,” “herein,” “hereby,” “hereunder” and similar terms in this Agreement refer to this Agreement as a whole and not to any particular provision of this Agreement. Section, subsection, clause,
schedule, annex and exhibit references are to this Agreement unless otherwise specified. Any reference to this Agreement shall include all alterations, amendments, changes, extensions, modifications, renewals, replacements, substitutions, and
supplements thereto and thereof, as applicable. Whenever the context may require, any pronoun includes the corresponding masculine, feminine and neuter forms. 

[No further text appears; signature pages follow] 
  

 20 

 IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year
first above written. 
  

			
	GSI GROUP INC., on behalf of itself and its affiliates and subsidiaries listed below
		
	By:	 	/s/ Marina Hatsopoulos
	Name:	 	Marina Hatsopoulos
	Title:	 	Director
	
	GSI Group Corporation
	MES International, Inc.

[signatures continued on next page] 

					
	HALE CAPITAL PARTNERS, LP
		
	By: 	 	/s/ Martin Hale, Jr.
		 	Name: 	 	Martin Hale, Jr.
		 	Title:	 	Managing Member

							
	LIBERTY HARBOR MASTER FUND I, L.P.
		
	By: 	 	Liberty Harbor I GP, LLC, its general partner
			
		 	By: 	 	/s/ Gregg J. Felton
		 		 	Name: 	 	Gregg J. Felton
		 		 	Title:	 	President

							
	TINICUM CAPITAL PARTNERS II, L.P.
		
	By: 	 	Tinicum Lantern II LLC, Its General Partner
			
		 	By: 	 	/s/ Eric Ruttenberg
		 		 	Name: 	 	Eric Ruttenberg
		 		 	Title:	 	Managing Partner

							
	SPECIAL VALUE CONTINUATION PARTNERS, L.P.
		
	By:	 	Tennenbaum Capital Partners, LLC
		 	Its: Investment Manager
	
	SPECIAL VALUE EXPANSION FUND, LLC
		
	By:	 	Tennenbaum Capital Partners, LLC
		 	Its: Investment Manager
	
	 TENNENBAUM OPPORTUNITIES

PARTNERS V, LP

		
	By:	 	Tennenbaum Capital Partners, LLC
		 	Its: Investment Manager
	
	SPECIAL VALUE OPPORTUNITIES FUND, LLC
		
	By:	 	Tennenbaum Capital Partners, LLC
		 	Its: Investment Manager
	
	Each of the above by:
			
		 	By: 	 	/s/ Howard Levkowitz
		 		 	Name: 	 	Howard Levkowitz
		 		 	Title:	 	Managing Partner

							
	HIGHBRIDGE INTERNATIONAL LLC
		
	By:	 	Highbridge Capital Management, LLC
		 	Its Trading Manager
			
		 	By: 	 	/s/ Mark J. Vanacore
		 		 	Name: 	 	Mark J. Vanacore
		 		 	Title:	 	Managing Director

 Schedule I 

SCHEDULE OF BACKSTOP INVESTORS 
  

							
	 Name and Address of Backstop Investors
	  	Initial Senior Note
Claims, as adjusted
pursuant to Section 10.8	  	Backstop
Percentage	 
	 Liberty Harbor Master Fund I, L.P.

c/o Liberty Harbor, LLC

32 Old Slip

New York, NY 10005

Facsimile: (212) 428-3889
	  	$	70,000,000	  	37.84	% 
	 Highbridge International LLC

c/o Highbridge Capital Management, LLC

9 West 57 Street, 27th Floor

New York, New York 10019

Facsimile: (212) 287 4915
	  	$	47,500,000	  	25.68	% 
	 Tennenbaum Opportunities Partners V, LP

c/o Tennenbaum Capital Partners, LLC

2951 28th Street, Suite 1000

Santa Monica, CA 90405

Facsimile: (310) 899-4950
	  	$	20,743,000	  	11.21	% 
	 Special Value Continuation Partners, L.P.

c/o Tennenbaum Capital Partners, LLC

2951 28th Street, Suite 1000

Santa Monica, CA 90405

Facsimile: (310) 899-4950
	  	$	7,778,000	  	4.20	% 
	 Special Value Expansion Fund, LLC

c/o Tennenbaum Capital Partners, LLC

2951 28th Street, Suite 1000

Santa Monica, CA 90405

Facsimile: (310) 899-4950
	  	$	5,632,000	  	3.04	% 
	 Special Value Opportunities Fund, LLC

c/o Tennenbaum Capital Partners, LLC

2951 28th Street, Suite 1000

Santa Monica, CA 90405

Facsimile: (310) 899-4950
	  	$	13,347,000	  	7.22	% 
	 Tinicum Capital Partners II, LP

c/o Tinicum Inc.

One Maritime Plaza, Suite 1650

San Francisco, CA 94111

Facsimile: (212) 750-9264
	  	$	15,000,000	  	8.11	% 
	 Hale Capital Partners, LP

570 Lexington Ave, 49th Floor

New York, New York 10022

Facsimile: (212) 751-8822
	  	$	5,000,000	  	2.70	% 
		  	 	 	  	 	 
	 Total:
	  	$	185,000,000	  	100	% 

 Exhibit A 

ADDENDUM 

Reference is made to that certain Backstop Commitment Agreement (as amended, modified or supplemented from time to time, the
“Agreement”) by and among GSI Group, Inc. and each of its subsidiaries and affiliates that are debtors in the Chapter 11 Cases (collectively, “Company”) and each of the Backstop Investors party thereto from time to
time. Each capitalized term used but not defined herein shall have the meaning given to it in the Agreement. 
 Upon execution
and delivery of this Addendum by the undersigned, as provided in Section 10.8 of the Agreement, the undersigned hereby becomes a Backstop Investor, as applicable thereunder and bound thereby effective as of the date of the Agreement.

 By executing and delivering this Addendum, the undersigned represents and warrants, for itself and for the benefit of each
party to the Agreement, that: 
  

	 	(a)	as of the date of this Addendum, the Transferee is the legal and beneficial owner of the principal amount of the Senior Notes set forth on the signature page hereto
(the “Senior Note Amount”), or advisor for beneficial holders of such Senior Note Amount as set forth below its signature, except to the extent that it may have entered into an agreement to transfer all or a portion of such Senior
Note Amount and the transferee has executed and delivered an Assumption and Joinder Agreement therefor (a copy of which is attached to this Addendum); 

  

	 	(b)	other than pursuant to the Agreement, its ownership of the Senior Note Amount is free and clear of any pledge, lien, security interest, charge, claim, equity, option,
proxy, voting restriction, right of first refusal, or other limitation on disposition or encumbrances of any kind that would adversely affect in any way such Transferee’s performance of its obligations contained in the Agreement at the time
such obligations are required to be performed; 

  

	 	(c)	as of the date of this Addendum, with respect to each Transferee that (i) is an individual, such Transferee has all requisite authority to enter into this Addendum
and to carry out the transactions contemplated by, and perform its respective obligation under, the Agreement and (ii) is not an individual such Transferee is, it is duly organized, validly existing, and in good standing under the laws of the
state of its organization, and has all requisite corporate, partnership, or limited liability company power and authority to enter into this Addendum and to carry out the transactions contemplated by, and perform its respective obligations under,
the Agreement; 

  

	 	(d)	assuming the due execution and delivery of the Agreement by the Company the Addendum and the Agreement are legally valid and binding obligations of it, enforceable
against it in accordance with its terms, except as may be limited by bankruptcy, insolvency or similar laws, or by equitable principles relating to or limiting creditors’ rights generally; and 

	 	(e)	as of the date of this Addendum, it is not aware of any event that, due to any fiduciary or other duty to any other person, would prevent it from taking any action
required of it under the Agreement and this Addendum. 

 By executing and delivering this Addendum, the
undersigned agrees to be bound by all the terms of the Agreement. 
 The undersigned acknowledges and agrees that once delivered
to the Company, it may not revoke, withdraw, amend, change or modify this Addendum unless the Agreement has been terminated. 

THIS ADDENDUM SHALL BE GOVERNED BY, AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD
TO CONFLICTS OF LAW PRINCIPLES THAT WOULD REQUIRE THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION. 
 This Addendum may be
executed in one or more counterparts, each of which, when so executed, shall constitute the same instrument and the counterparts may be delivered by facsimile transmission or by electronic mail in portable document format (.pdf). 

[Signature on Following Page] 

 IN WITNESS WHEREOF, the parties hereto have caused this Addendum to be duly executed and
delivered by their proper and duly authorized officers as of this          day of
                    , 2010. 
  

			
	TRANSFEREE WHO BECOMES A BACKSTOP INVESTOR
	
	[NAME]
	
	 
	as a Backstop Investor
	[Please type the legal name of the undersigned above]
		
	By:	 	 
	Name:	 	
	Title:	 	
	
	[If second signature is necessary:]
		
	By:	 	 
	Name:	 	
	Title:	 	
	
	Principal Amount of Senior Notes: $            

 Exhibit B 

ASSUMPTION AND JOINDER AGREEMENT 

Reference is made to (i) that certain Backstop Commitment Agreement (as amended, modified or supplemented from time to time, the
“Agreement”), dated as of                     , 2010, by and among GSI Group, Inc. (“GSI Group”) and each of
its subsidiaries and affiliates that are a debtor in the Chapter 11 Cases (collectively, “Company”), and each of the Backstop Investors party thereto from time to time, and (ii) that certain Addendum, dated as of
                    , 2010 (the “Transferor Addendum”) submitted by
                    , as transferor (the “Transferor”). Each capitalized term used but not defined herein shall have the
meaning given to it in the Agreement. 
 As a condition precedent to becoming the holder or owner of 

 ̈
                     dollars ($            ) in principal amount of
the Senior Note Claims 
 held as of the date hereof by the Transferor, the undersigned (the “Transferee”)
hereby agrees to become bound by all the terms, conditions and obligations set forth in the Agreement and the Transferor Addendum copies of which are attached hereto as Annex I. This Assumption and Joinder Agreement shall take effect and shall
become an integral part of the Agreement and the Transferor Addendum immediately upon its execution, and the Transferee shall be deemed to be bound by all of the terms, conditions and obligations of the Agreement and the Transferor Addendum as of
the date thereof. The Transferee acquiring Senior Note Claims from a Backstop Investor shall hereafter be deemed to be a “Backstop Investor” and a “party” for all purposes under the Agreement. 

[Signatures on Following Page] 

 IN WITNESS WHEREOF, this Assumption and Joinder Agreement has been duly executed by each of
the undersigned as of the date specified below. 
 Date:
                    , 2010 
  

					
			
	  	 		 	  
	Name of Transferor	 		 	Name of Transferee
			
	  	 		 	  
	Authorized Signatory of Transferor	 		 	Authorized Signatory of Transferee
			
	  	 		 	  
	(Type or Print Name and Title of Authorized Signatory)	 		 	(Type or Print Name and Title of Authorized Signatory)
			
	 	 		 	 
		 		 	Address of Transferee:
			
		 		 	 
			
		 		 	 
			
		 		 	 
		 		 	Attn:
			
		 		 	 
		 		 	Tel:
			
		 		 	 
		 		 	Fax:
			
		 		 	 
		 		 	E-mail:Engagement Letter

 Exhibit 10.3 

 

			
	
 

	  	 FTI Consulting
 3 Times
Square
 11th Floor
 New York, NY 10036

 212.247.1010 telephone
 212.841.9350
facsimile
 www.fticonsulting.com

CONFIDENTIAL 
 May 6, 2010

 GSI Group, Inc. 
 GSI Group
Corporation 
 MES International, Inc. 

125 Middlesex Turnpike 
 Bedford, Massachusetts
01730 
 Attention: 

Ms. Marina Hatsopoulos 
 Dear
Ms. Hatsopoulos: 
 The purpose of this letter is to confirm the understanding and agreement (the
“Agreement”) between GSI Group, Inc., GSI Group Corporation and MES International, Inc. (collectively, the “Client”) and FTI Consulting, Inc. (“FTI”) concerning the Client’s engagement of FTI to provide certain
temporary employees to the Client to provide post-petition crisis and turnaround management services (the “Services”) in connection with Client’s current cases under Title 11, Chapter 11 of the United States Code (“Chapter
11”) which are being jointly administered under case 09-14109 in the District of Delaware (the “Court”). This Agreement is effective on
May 6th, 2010 (the “Effective Date”). The
FTI Standard Terms and Conditions attached hereto as Exhibit “A” are also incorporated herein and forms part of this Agreement. 
  

	1.	Temporary Officers, Hourly Temporary Employees and Services 

FTI will provide Michael E. Katzenstein to serve as the Client’s Chief Restructuring Officer (the “CRO”) and Gabriel E. Bresler to serve as
the Client’s Associate Chief Restructuring Officer (the “Temporary Officers”) reporting to the Board of Directors. The Temporary Officers, as well as any additional Hourly Temporary Staff, (as defined below), shall have such duties as
the Client’s board of directors (the “Board”), or any committee of the Board to whom appropriate authority has been delegated by the Board in connection with the Chapter 11 (the “Committee”), may from time to time determine,
and shall at all times report to and be subject to supervision by the Board and/or Committee. Without limiting the foregoing, the Temporary Officers, as well as any Hourly Temporary Staff, shall work with other senior management of the Client, and
other professionals, to provide the Services. 
 In addition to providing the Temporary Officers, FTI may also provide the Client with
additional staff (the “Hourly Temporary Staff” and, together with the Temporary Officers, the “FTI Professionals”), subject to the terms and conditions of this Agreement. The Hourly Temporary Staff may be assisted by or replaced
by other FTI professionals reasonably satisfactory to the Board and/or Committee, as required, who shall also become Hourly Temporary Staff for purposes hereof. FTI will keep the Board and/or Committee reasonably informed as to FTI’s staffing
and will not add additional Hourly Temporary Staff to the assignment without first consulting with the Client. 

 The engagement of FTI to perform the Services shall be subject to the approval of the Bankruptcy Court and
shall be substantially as provided in this Agreement as modified by the retention order approved by the Bankruptcy Court. Client agrees, at Client’s expense, to file an application (the “Application”) to employ FTI as crisis and
turnaround manager nunc pro tunc to the Effective Date pursuant to § 363 of the Bankruptcy Code. The Client agrees to file all required applications, including the Application, for the employment or retention of FTI at the earliest
practical time. 
 The Services do not include (i) audit, legal, tax, environmental, accounting, actuarial, employee benefits, insurance
advice or similar specialist and other professional services which are typically outsourced and which shall be obtained directly where required by the Client at Client’s expense; or (ii) investment banking, including valuation or
securities analysis, including advising any party or representation of the Client on the purchase, sale or exchange of securities or representation of the Client in securities transactions. FTI is not a registered broker-dealer in any jurisdiction
and will not offer advice or its opinion or any testimony on valuation or exchanges of securities or on any matter for which FTI is not appropriately licensed or accredited. An affiliate of FTI is a broker-dealer but is not being engaged by the
Client to provide any investment banking or broker-dealer services. The Client agrees to supply office space, and office and support services to FTI as reasonably requested by FTI in connection with the performance of its duties hereunder.

 FTI is providing certain non-bankruptcy services to the Client assisting the Chief Financial Officer with accounting and reporting services.
FTI does not believe this assistance is related to the Chapter 11 cases. 
  

	2.	Compensation to FTI 

 Monthly Fee

 For services rendered in connection with this assignment, the Client agrees to pay FTI a monthly, non-refundable advisory fee of $175,000 per
month for the services of Michael E. Katzenstein and Gabriel E. Bresler. Any additional professionals added as Hourly Temporary Staff will be billed at their current hourly rate. Fees are payable in advance and may be billed as frequently as weekly
and will be billed not less frequently than monthly. 
 The monthly fee provided for Michael E. Katzenstein and Gabriel E. Bresler is a
discounted fee that is less than the fees that the Client would incur if FTI were to bill it on an hourly basis. The normal hourly billing rates for any additional professionals with the skills and experience needed for engagements of this kind, for
2010 and which are subject to period revision, are as follows: Senior Managing Directors - $795 to $885; Managing Directors - $675 to $725; Directors - $545 to $620; Consultants - $305 to $485; 

Completion Fee: 
 The Client agrees that FTI
shall have a Completion Fee opportunity in partial consideration of the discounted monthly flat fee and to compensate FTI for achieving the restructuring objectives of the Client. If, during the term of this Agreement or during the three
(3) months following the termination of this Agreement (which, if a Sale agreement is entered into during such three month period following termination, shall be extended in respect of such agreement until it has been consummated or
terminated), the Audit Preparation is completed and Client completes a Restructuring or Sale, FTI 
  

					
		 	-2-	 	

 
will earn a Completion Fee of $1,400,000, payable in cash on the later of the date the Audit Preparation is completed, the effective date of the Restructuring or on closing of the Sale, as the
case may be. After August 6, 2010, each Monthly Fee of $175,000 actually paid (but not amounts paid for Hourly Temporary Staff) will be credited against the Completion Fee when earned, but in no event will the Completion Fee be reduced below
zero. 
 “Audit Preparation” means that the required Temporary Officers are prepared to approve the final 2009 financial statement
closing package for submission to the Client’s external auditors for purposes of their 2009 audit procedures. 
 “Restructuring”
means the entry of a final non-appealable order of the Bankruptcy Court confirming a plan of reorganization for the Client. 
 “Sale”
means, collectively, any transaction or series of transaction involving an acquisition, merger, consolidation or other business combination pursuant to which the business or assets or substantially all of the assets of any or all of the entities
constituting the Client are, directly or indirectly, combined with another company, other than in the ordinary course of business; the acquisition, directly or indirectly, by a buyer or buyers (which term shall include a “group” of persons
as defined in Section 13(d) of the Securities Exchange Act of 1934, as amended), of equity interests or options, or any combination thereof, constituting a majority of the then outstanding stock of any or all of the entities constituting the
Client or possessing the majority of then outstanding voting power of any or all of the entities constituting the Client; any other purchase or acquisition, directly or indirectly, by a buyer or buyers of assets or substantially all of the assets,
securities or other interests of any or all of the entities constituting the Client; and the formation of a joint venture partnership with any or all of the entities constituting the Client or direct investment in any or all of the entities
constituting the Client for the purpose of effecting a transfer of an interest in the Client to a third party. 
 In the event that the Client
closes upon a Sale in which the Audit Preparation is not necessary or required, then FTI shall be entitled to a reduced Completion Fee in a reasonable amount to be agreed upon by FTI and the Client taking into account FTI’s services in
connection with such Sale. In the event that FTI and the Client are unable to agree on an appropriate amount of the reduced Completion Fee, such amount shall be set by the Bankruptcy Court. 

The Completion Fee shall be subject to any required approval of the Bankruptcy Court having jurisdiction over the Chapter 11 Cases. The Client agrees to
file any required Bankruptcy Court application for approval of the Completion Fee. 
 Expenses: 

In addition to the fees outlined above, FTI will bill for reasonable direct expenses. On no less than a bi-weekly basis, FTI will provide the Client with
reasonably detailed billing statements with respect to such expenses. Direct expenses include reasonable and customary out-of-pocket expenses which are billed directly to the engagement such as certain telephone, overnight mail, messenger, travel,
meals, accommodations and other expenses specifically related to the engagement. Further, if FTI and/or any of its employees are required to testify or provide evidence at or in connection with any judicial or administrative proceeding relating to
this matter, FTI will be compensated by you at its regular hourly rates and reimbursed for reasonable allocated and direct expenses (including counsel fees) with respect thereto. 

 

					
		 	-3-	 	

 Cash on Account: 

Immediately upon execution of this Agreement or as authorized by the Court, Client will fund the amount of $175,000 “on account,” to be held as
an “evergreen retainer” and as continuing security for the payment of fees and expenses to FTI and to be applied to any unpaid amounts due to FTI at the completion of our engagement, with the unused portion of the retainer refunded to the
Client upon payment in full of all fees and expenses. Notwithstanding the foregoing, FTI may apply the cash held on account to any unpaid invoices in the event the Client fails to make timely payment. Subject to obtaining any required Bankruptcy
Court approvals, the Client agrees to increase or supplement the Cash on Account from time to time during the course of the Engagement in such amounts as the Client and we mutually shall agree are reasonably necessary to a level that will be
sufficient to fund Engagement fees, charges, and disbursements to be incurred. 
 Invoicing and Payments: 

FTI will send the Client periodic invoices for fees, charges and disbursements and, in certain circumstances, an invoice may be for estimated fees,
charges and disbursements through a date certain. Each invoice constitutes a request for an interim payment against the fee to be determined at the conclusion of our Services. The Client agrees upon submission of each such invoice to wire the
invoice amount to us within two (2) business days of our issuing the invoice, without prejudice to the Client’s right to advise us of any differences it may have with respect to such invoice. 

Payments to FTI shall be made by wire transfer to the following account: 

FTI Wire Instructions: 

Bank of America 

ABA # 0260-0959-3 

Account # 003939577164 

Additional Provisions Regarding Fees: 
  

	a)	The Client agrees to promptly notify FTI if the Client or any of its subsidiaries or affiliates extends (or solicits the possible interest in receiving) an offer of
employment to a principal or employee of FTI involved in this Engagement and agrees that FTI has earned and is entitled to a cash fee, upon hiring, equal to 150% of the aggregate first year’s annualized compensation, including any guaranteed or
target bonus and equity award, to be paid to FTI’s former principal or employee that the Client or any of it subsidiaries or affiliates hires at any time up to one year subsequent to the date of the final invoice rendered by FTI with respect to
this Engagement. 

  

	b)	FTI may stop work or terminate the Agreement immediately upon the giving of written notice to the Client (i) if payments are not made in accordance with this
Agreement, (ii) if the Application is not approved by the Bankruptcy Court, (iii) if the Chapter 11 case is dismissed or converted to a Chapter 7 proceeding, or (iv) if a Chapter 11 Trustee or other responsible person is appointed.

  

	c)	 (i) In the event that FTI is employed post-petition under § 363 of the Bankruptcy Code, FTI shall invoice the Client for its monthly fees
every two weeks in advance and the Client shall pay FTI’s invoices promptly, within two (2) business days of invoice date. If, and only if, local Bankruptcy rules or the order approving the Application so require, FTI shall file with and
serve on creditors entitled to notice thereof, a statement of staffing, professional services, compensation or expenses, on a quarterly basis, or as the Bankruptcy Court or rules may direct, and creditors and other parties

  

					
		 	-4-	 	

	 	
in interest shall have an opportunity to object thereto and request a hearing thereon. (ii) In the event that FTI is employed post-petition as a “professional person” pursuant to
§ 327 of the Bankruptcy Code, Bankruptcy Court approval will generally be required to pay FTI’s fees and expenses for Post-petition Services. In most cases of this size and complexity, on request of a party in interest, the bankruptcy
court permits the payment of interim fees during the case. The Client agrees that in this situation it will, at the Client’s expense, request the Bankruptcy Court to establish a procedure for the payment of interim fees during the case that
would permit payment of interim fees. If the Bankruptcy Court approves such a procedure, we will submit invoices on account against our final fee. These interim invoices will be based on such percentage as the bankruptcy court allows of our internal
time charges and costs and expenses for the work performed during the relevant period and will constitute a request for an interim payment against the reasonable fee to be determined at the conclusion of our Engagement. 

 

	d)	Any unpaid post-petition fees, charges and disbursements will be due and payable immediately upon entry of an order containing such court approval or at such time
thereafter as instructed by the court. The Client understands that while the arrangement in this paragraph may be altered in whole or in part by the bankruptcy court, the Client shall nevertheless remain liable for payment of court approved
post-petition fees and expenses. Such items are afforded administrative priority under 11 U.S.C. §503(b)(l). The Bankruptcy Code provides in pertinent part, at 11 U.S.C. §1l29(a)(9)(A), that a plan cannot be confirmed unless administrative
claims are paid in full in cash on the effective date of any plan (unless the holders of such claims agree to different treatment). It is agreed and understood that the unused portion, if any, of the Cash on Account shall be held by us and applied
against the final fee application filed and approved by the court. 

  

	e)	Client agrees that FTI is not an employee of the Client and the FTI employees and independent FTI contractors who perform the Services are not employees of the Client,
and they shall not receive a W-2 from the Client for any fees earned under this engagement, and such fees are not subject to any form of withholding by the Client. The Client shall provide FTI a standard form 1099 on request for fees earned under
this Engagement. 

  

	f)	Copies of Invoices shall be sent by facsimile or email as follows: 

To the Client at: 

GSI Group, Inc. 

GSI Group Corporation 

MES International, Inc. 

125 Middlesex Turnpike 

Bedford, Massachusetts 01730 

Attention: Ms. Marina Hatsopoulos 
  

					
		 	-5-	 	

	3.	Term 

 This
Agreement is terminable by the Client or by FTI at any time upon the giving of thirty (30) days written notice. Upon such termination by the Client (the “Termination Date”), FTI shall cease work and the Client shall have no further
obligation for fees and expenses of FTI arising or incurred after the Termination Date, provided, however, that, notwithstanding any termination by Client or by FTI in the circumstances described in paragraph (b) of “Additional
provisions Regarding Fees”, 
  

	 	(A)	The Client shall reimburse FTI for its out-of-pocket expenses (the “Termination Expenses”) incurred in connection with commitments made by FTI prior to the
Termination Date with respect to advance travel arrangements reasonably incurred, to the extent FTI is unable to obtain refunds of such expenses. FTI shall provide the Client with reasonable documentation to substantiate all Termination Expenses for
which payment is requested; and 

  

	 	(B)	Unless FTI is in default of this Agreement, termination shall not affect FTI’s entitlement to the Completion Fee; provided, however, that FTI shall not be entitled
to the Completion Fee if it terminates this Agreement for reasons other than the circumstances described in paragraph (b) of “Additional Provisions Regarding Fees”. 

 

	4.	Availability of Information 

In connection with FTI’s activities on the Client’s behalf, the Client agrees (i) to furnish FTI with all information and
data concerning the business and operations of the Client which FTI reasonably requests, and (ii) to provide FTI with reasonable access to the Client’s officers, directors, partners, employees, retained consultants, independent
accountants, and legal counsel. FTI shall not be responsible for the truth or accuracy of materials and information received by FTI under this agreement. 
  

	5.	Notices 

 Notices
under this Agreement to the Client shall be provided as set forth in paragraph 2(f). 
 Notices to FTI shall be to: 

3 Times Square,
9th Floor 

New York, NY 10036 

Attn: Michael E. Katzenstein 

Phone: (214) 384-4909 

Fax: (214) 260-7127 

Email: mike.katzenstein@fticonsulting.com 

Notices shall be provided by (a) fax and email, (b) hand delivery, or (c) overnight delivery. If provided by fax and email
or hand delivery, they shall be deemed effective the date given. If provided by overnight delivery, they shall be deemed effective on the date of actual receipt. 
  

	6.	Miscellaneous 

This Agreement: represents the entire understanding of the parties hereto and supersedes any and all other prior agreements among the
parties regarding the subject matter hereof; shall be binding upon and inure to the benefit of the parties and their respective heirs, representatives, successors and assigns; may be executed by facsimile (followed by originals sent via regular
mail), and in two or more counterparts, each of which shall be deemed to be an original, but all of which together shall constitute one and the same instrument; and may not be waived, modified or amended unless in writing and signed by a
representative of the Client and FTI. The provisions of this Agreement shall be severable. No failure to delay in exercising any right, power or privilege related hereto, or any single or partial exercise thereof, shall operate as a waiver thereof.

  

					
		 	-6-	 	

 If this letter correctly sets forth our understanding, please so acknowledge by signing below and returning
a signed copy of this letter to us. 
  

			
	Very truly yours,
	
	FTI CONSULTING, INC.
		
	By:	 	/s/ Michael E. Katzenstein
	Name:	 	Michael E. Katzenstein
	Title:	 	Senior Managing Director

  

			
	ACCEPTED AND AGREED this              day of May, 2010.
	
	GSI GROUP INC., on behalf of itself and its subsidiaries listed below
		
	By:	 	/s/ Marina Hatsopoulos
	 Name:
 Title:
	 	 Marina Hatsopoulos
 Director

		
	Date:	 	May 14, 2010
	
	GSI GROUP CORPORATION
	
	MES INTERNATIONAL, INC.

  

					
		 	-7-	 	

 EXHIBIT “A” 

FTI CONSULTING, INC. 

STANDARD TERMS AND CONDITIONS 

The following are the Standard Terms and Conditions on which we will provide the Services to you set forth within the attached letter of engagement with
GSI Group, Inc. GSI Corporation and MES International, Inc. dated May 6, 2010. The Engagement letter and the Standard Terms and Conditions (collectively the “Engagement Contract”) form the entire agreement between us relating to the
Services and replace and supersede any previous proposals, letters of engagement, undertakings, agreements, understandings, correspondence and other communications, whether written or oral, regarding the Services. The headings and titles in the
Engagement Contract are included to make it easier to read but do not form part of the Engagement Contract. 
  

	1.	Reports and Advice 

  

	1.1	Use and purpose of advice and reports – Any advice given or report issued by us is provided solely for your use and benefit and only in connection with the
purpose in respect of which the Services are provided. Unless required by law, you shall not provide any advice given or report issued by us to any third party, or refer to us or the Services, without our prior written consent. In no event,
regardless of whether consent has been provided, shall we assume any responsibility to any third party to which any advice or report is disclosed or otherwise made available. 

 

	2.	Information and Assistance 

  

	2.1	Provision of information and assistance – Our performance of the Services is dependent upon your providing us with such information and assistance as we may
reasonably require from time to time. 

  

	2.2	Punctual and accurate information – You shall use reasonable skill, care and attention to ensure that all information we may reasonably require is provided
on a timely basis and is accurate and complete and relevant for the purpose for which it is required. You shall also notify us if you subsequently learn that the information provided is incorrect or inaccurate or otherwise should not be relied upon.

  

	2.3	No assurance on financial data – While our work may include an analysis of financial and accounting data, the Services will not include an audit,
compilation or review of any kind of any financial statements or components thereof. Client management will be responsible for any and all financial information they provide to us during the course of this Engagement, and we will not examine or
compile or verify any such financial information. Moreover, the circumstances of the Engagement may cause our advice to be limited in certain respects based upon, among other matters, the extent of sufficient and available data and the opportunity
for supporting investigations in the time period. Accordingly, as part of this Engagement, we will not express any opinion or other form of assurance on financial statements of the Client. 

 

	2.4	Prospective financial information—In the event the Services involve prospective financial information, our work will not constitute an examination or
compilation, or apply agreed-upon procedures, in accordance with standards established by the American Institute of Certified Public Accountants or otherwise, and we will express no assurance of any kind on such information. There will usually be
differences between estimated and actual results, because events and circumstances frequently do not occur as expected, and those differences may be material. We will take no responsibility for the achievability of results or events projected or
anticipated by the management of the Client. 

  

					
		 	-8-	 	

	3.	Additional Services 

  

	3.1	Responsibility for other parties – You shall be solely responsible for the work and fees of any other party engaged by you to provide services in connection
with the Engagement regardless of whether such party was introduced to you by us. Except as provided in this Engagement Contract, we shall not be responsible for providing or reviewing the advice or services of any such third party, including advice
as to legal, regulatory, accounting or taxation matters. Further, we acknowledge that we are not authorized under our Engagement Contract to engage any third party to provide services or advice to you, other than our agents or independent
contractors engaged to provide Services, without your written authorization. 

  

	4.	Confidentiality 

  

	4.1	Restrictions on confidential information – Both parties agree that any confidential information received from the other party shall only be used for the
purposes of providing or receiving Services under this or any other contract between us. Except as provided below, neither party will disclose the other party’s confidential information to any third party without the other party’s consent.
Confidential information shall not include information that: 

  

	 	4.1.1 	is or becomes generally available to the public other than as a result of a breach of an obligation under this Clause 4.1; 

 

	 	4.1.2 	is acquired from a third party who, to the recipient party’s knowledge, owes no obligation of confidence in respect of the information; or

  

	 	4.1.3 	is or has been independently developed by the recipient. 

  

	4.2	Disclosing confidential information – Notwithstanding Clause 1.1 or 4.1 above, either party will be entitled to disclose confidential information of the
other to a third party to the extent that this is required by valid legal process, provided that (and without breaching any legal or regulatory requirement) where reasonably practicable not less than 2 business days’ notice in writing is first
given to the other party. 

  

	4.3	Citation of engagement – Without prejudice to Clause 4.1 and Clause 4.2 above, to the extent our engagement is or becomes known to the public, we may cite
the performance of the Services to our clients and prospective clients as an indication of our experience, unless we and you specifically agree otherwise in writing. 

 

	4.4	Internal quality reviews – Notwithstanding the above, we may disclose any information referred to in this Clause 4 to any other FTI entity or use it for
internal quality reviews. 

  

	4.5	Maintenance of workpapers – Notwithstanding the above, we may keep one archival set of our working papers from the Engagement, including working papers
containing or reflecting confidential information, in accordance with our internal policies. 

  

					
		 	-9-	 	

	5.	Termination 

Termination of Engagement with notice – This Agreement is terminable by the Client or by FTI at any time upon the giving of
thirty (30) days written notice. Upon such termination by the Client (the “Termination Date”), FTI shall cease work and the Client shall have no further obligation for fees and expenses of FTI arising or incurred after the Termination
Date, provided, however, that, notwithstanding any termination by the Client or by FTI in the circumstances described in paragraph (b) of “Additional Provisions Regarding Fees”, 

 

	 	a)	The Client shall reimburse FTI for its out-of-pocket expenses (the “Termination Expenses”) incurred in connection with commitments made by FTI prior to the
Termination Date with respect to advance travel arrangements reasonably incurred, to the extent FTI is unable to obtain refunds of such expenses. FTI shall provide the Client with reasonable documentation to substantiate all Termination Expenses for
which payment is requested; and 

  

	 	b)	Unless FTI is in material default of this Agreement, termination shall not affect FTI’s entitlement to the Completion Fee; provided, however, that FTI shall not be
entitled to the Completion Fee if it terminates this Agreement for reasons other than the circumstances described in paragraph (b) of “Additional Provisions Regarding Fees”. 

 

	5.1	Continuation of terms – The terms of the Engagement that by their context are intended to be performed after termination or expiration of this Engagement
Contract, including but not limited to, Clauses 3 and 4 of the Engagement letter, and Clauses 1.1, 4, 6 and 7 of the Standard Terms and Conditions, are intended to survive such termination or expiration and shall continue to bind all parties.

  

	6.	Indemnification and Liability Limitation; Waiver of Jury Trial 

  

	6.1	Indemnification and Insurance – Subject to any limitation post-petition required by the Bankruptcy Court, the Client agrees to indemnify and hold harmless
FTI and its shareholders, directors, officers, managers, employees, contractors, agents and controlling persons (each, an “Indemnified Party”) from and against any losses, claims, damages or expenses, or if same was or is or becomes a
party to or witness or other participant in, or is threatened to be made a party to or witness or other participant in, any threatened, pending or completed action, suit, proceeding or alternative dispute resolution mechanism, or any hearing,
inquiry or investigation, in each case by reason of (or arising in part out of) any event or occurrence related to this agreement or any predecessor agreement for services or the fact that any Indemnified Party is or was an agent, officer director,
employee or fiduciary of the Client, or by reason of any action or inaction on the part of any Indemnified Party while serving in such capacity (an “Indemnifiable Event”) against expenses (including reasonable attorneys’ fees and
disbursements), judgments, fines, settlements and other amounts actually and reasonably incurred in connection with any Indemnifiable Event. The Application shall include the assumption by the Client of FTI’s right to indemnification in respect
of its actions under this Agreement prior to the Petition Date. The Indemnified Party shall promptly forward to the Client all written notifications and other matter communications regarding any claim that could trigger the Client’s
indemnification obligations under this Section 6. If the Client so elects or is requested by an Indemnified Party, the Client will assume the defense of such action or proceeding, including the employment of counsel reasonably satisfactory to
the Indemnified Party and the payment of the reasonable fees and disbursements of such counsel. In the event, however, such Indemnified Party is advised by counsel that having common counsel would present such counsel with a conflict of interest or
if the defendants in, or targets of, any such action or proceeding include both an Indemnified Party and the Client, and such Indemnified Party is advised by counsel that there may be legal defenses available to it or other Indemnified Parties that
are different from or in addition to those available to the Client, or if the Client fails to assume the defense of the action or proceeding or to employ counsel reasonably satisfactory to such Indemnified Party, in either case in a timely manner,
then such Indemnified Party may employ separate counsel to represent or defend it in any such action or proceeding and the Client will pay the reasonable fees and disbursements of such counsel; provided, however, that the Client will not be
required to pay the fees and disbursements of more than one separate counsel (in addition to local counsel) for an Indemnified Party in any jurisdiction in any single action or proceeding. In any action or proceeding the defense of which the Client
assumes, the Indemnified Party will have the right to participate in such litigation and to retain its own counsel at such Indemnified Party’s own expense. The Client further agrees that the Client will not, without the prior written consent of
the Indemnified Party (which consent shall not be unreasonably withheld or delayed), settle or compromise or consent to the entry of any judgment in any pending or threatened claim, action, suit or proceeding in respect of which indemnification or
contribution may be sought hereunder (whether or not the Indemnified Party or any other Indemnified 

  

					
		 	-10-	 	

	 	
Party is an actual or potential party to such claim, action, suit or proceeding) unless (i) to the extent that such settlement, compromise or consent purports directly or indirectly to cover
the Indemnified Party or any other Indemnified Party, such settlement, compromise or consent includes an unconditional release of the Indemnified Party and each other Indemnified Party from all liability arising out of such claim, action, suit or
proceeding, or (ii) to the extent that such settlement, compromise or consent does not purport directly or indirectly to cover the Indemnified Party or any other Indemnified Party, the Client has given the Indemnified Party reasonable prior
written notice thereof and used all reasonable efforts, after consultation with the Indemnified Party, to obtain an unconditional release of the other Indemnified Parties hereunder from all liability arising from all liability arising out of such
claim, action, suit or proceeding. The Indemnified Party shall not enter into any closing agreement or final settlement that could trigger the Client’s indemnification obligations under this Section 6 without the written consent of the
Client, which shall not unreasonably be withheld or delayed or conditioned. The Client will not be liable for any settlement of any action, claim, suit or proceeding affected without the Client’s prior written consent, which consent shall not
be unreasonably withheld or delayed or conditioned, but if settled with the consent of the Client or if there be a final judgment for the plaintiff, the Client agrees to indemnify and hold harmless the Indemnified Party from and against any loss or
liability by reason of such settlement or judgment, as the case may be. 

  

	6.2	This indemnity shall not apply to any portion of any such losses, claims, damages, liabilities and expenses to the extent it is found in a final judgment by a court of
competent jurisdiction to have resulted primarily from the bad faith, gross negligence, willful misconduct or violation of law of any such Indemnified Party. The Client agrees to use commercially reasonable best efforts to (i) include Michael
E. Katzenstein and Gabriel E. Bresler, and any other FTI personnel who assume officer or director positions with the Client or who perform Services hereunder, FTI and its agents, employees, officers, subcontractors, directors, joint venture partners
and members, as insureds under the Client’s directors and officers insurance; and (ii) unless it is unable to do so at a commercially reasonable cost, purchase a three-year directors and officers insurance “tail” or runoff policy
(or such a policy for such shorter period as Client has the right to or is otherwise able to purchase) covering the period of FTI’s service. 

In connection with this engagement Client represents to FTI that Client hereby represents that (i) it has timely remitted and will
continue to timely remit to the appropriate beneficiaries all employee source deductions, payroll and other taxes, benefits deductions, and contribution to employee benefit programs, and has timely collected and remitted sales and use and other
similar taxes to appropriate collecting authorities and will continue timely to do so; (ii) there is no litigation or other proceeding pending, or to knowledge of Client, threatened (nor is Client aware of facts that could give rise to such),
in each case that seeks or could give rise to personal liability of officers and directors of Client; and (iii) Client has been in continuing compliance with all applicable laws and regulations concerning the discharge, treatment, storage,
transportation or use of hazardous materials and is aware of no facts or circumstances that could give rise to Client responsibility or liability under such laws and regulations. 

 

	6.3	Limitation of liability – You agree that no Indemnified Person shall have any liability as a result of your retention of FTI, the execution and
delivery of this Engagement Contract, the provision of Services or other matters relating to or arising from this Engagement Contract, other than liabilities that shall have been determined by final non-appealable order of a court of competent
jurisdiction to have resulted from the gross negligence or willful misconduct of the Indemnified Person or Persons in respect of whom such liability is asserted. 

 

	6.4	WAIVER OF JURY TRIAL – TO FACILITATE JUDICIAL RESOLUTION AND SAVE TIME AND EXPENSE, YOU AND FTI IRREVOCABLY AND UNCONDITIONALLY AGREE NOT TO DEMAND A
TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM ARISING OUT OF OR RELATING TO THE SERVICES OR ANY SUCH OTHER MATTER. 

  

					
		 	-11-	 	

	7.	Governing Law and Jurisdiction – The Engagement Contract shall be governed by and interpreted in accordance with the laws of the State of New York,
without giving effect to the choice of law provisions thereof. The Bankruptcy Court having jurisdiction over the Client’s Bankruptcy case shall have exclusive jurisdiction in relation to any claim, dispute or difference concerning the
Engagement Contract and any matter arising from it. The parties submit to the jurisdiction of such Courts and irrevocably waive any right they may have to object to any action being brought in these Courts, to claim that the action has been brought
in an inconvenient forum or to claim that those Courts do not have jurisdiction. 

 FTI CONSULTING, INC. 

Confirmation of Standard Terms and Conditions 

We agree to engage FTI Consulting, Inc. upon the terms set forth in these Standard Terms and Conditions as outlined above. 

 

			
	
	GSI GROUP, INC.
		
	By:	 	 
		 	 [Print Name]
 [PrintTitle]

		
	Date:	 	 
	
	GSI GROUP CAPITAL, INC.
		
	By:	 	 
		 	 [Print Name]
 [PrintTitle]

		
	Date:	 	 
	
	MES INTERNATIONAL, INC.
		
	By:	 	 
		 	 [Print Name]
 [PrintTitle]

		
	Date:	 	 

  

					
		 	-12-	 	

 Exhibit B to Post-Petition Services Agreement 

FTI Professionals 

Temporary Officers 
  

			
	             Name	 	 Description

	 Michael E. Katzenstein*
	 	Chief Restructuring Officer
	 Gabriel E. Bresler*
	 	Associate Chief Restructuring Officer

Additional Hourly Temporary Staff 
  

			
	             Name	 	 Description

	 TBD
	 	
		 	
		 	

  

	*	Initial FTI Professionals 

	**	Supplementary professional staff. Any use of these resources will not cause an increase in the Monthly Service Fee without the Client’s subsequent written
approval. 

  

					
		 	-13-

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