Document:

EX-10.4

 EXHIBIT 10.4 

August 8, 2013 Retention Restricted Stock Unit Grant Agreement 

2009 McDermott International, Inc. Long-Term Incentive Plan 

On August 8, 2013, the Compensation Committee of the Board of Directors (the “Committee”) of McDermott International, Inc.
(“McDermott” or the “Company”) selected you to receive a grant of Restricted Stock Units (“RSUs”) under the 2009 McDermott International, Inc. Long-Term Incentive Plan (the “Plan”) on August 8, 2013 (the
“Date of Grant”). The provisions of the Plan are incorporated herein by reference. 
 Any reference or definition contained in this RSU Grant
Agreement (this “Agreement”) shall, except as otherwise specified, be construed in accordance with the terms and conditions of the Plan and all determinations and interpretations made by the Committee with regard to any question arising
hereunder or under the Plan shall be binding and conclusive on you and your beneficiaries, estate or personal representatives. The term “Company,” as used in this Agreement with reference to employment or service, shall include
subsidiaries of McDermott. Whenever the words “you” or “your” are used in any provision of this Agreement under circumstances where the provision should logically be construed to apply to any beneficiary, estate, or personal
representative to whom any rights under this Agreement may be transferred by will or by the laws of descent and distribution, they shall be deemed to include any such person or estate. This Agreement shall be subject to the Company’s Clawback
Policy, which is attached hereto as Exhibit A and is incorporated herein by reference. 
 Restricted Stock Units 

RSU Award. You have been awarded the number of RSUs shown on the Notice of Grant dated August 8, 2013, which is incorporated herein by reference.
Each RSU represents a right to receive a share of Company common stock on the Vesting Date (as set forth in the “Vesting Requirements” paragraph below), provided the vesting requirements set forth in this Agreement have been satisfied. No
shares of common stock are awarded or issued to you on the Date of Grant. 
 Vesting Requirements. Subject to the “Forfeiture of RSUs”
paragraph below, RSUs do not provide you with any rights or interest therein until they become vested under one or more of the following circumstances (each such date a “Vesting Date”): 

 

	 	•	 	100% of the RSUs on the third anniversary of the Date of Grant provided you are still employed with the Company on this date; 

  

	 	•	 	33% of the RSUs if your employment with the Company is involuntarily terminated by reason of a Reduction in Force on or after the first anniversary and prior to the second anniversary of the Date of Grant;

	 	•	 	66% of the RSUs if your employment with the Company is involuntarily terminated by reason of a Reduction in Force on or after the second anniversary and prior to the third anniversary of the Date of Grant; and

  

	 	•	 	100% of the RSUs on the earliest to occur prior to the third anniversary of the Date of Grant of: (1) the date of termination of your employment from the Company due to death, (2) your disability (as defined
in the Plan), or (3) the date a Change in Control (as defined in the Plan) occurs. 

 For purposes of this Agreement, a “Reduction
in Force” shall mean a termination of employment with the Company due to elimination of a previously required position or previously required services, or due to the consolidation of departments, abandonment of facilities or offices,
technological change or declining business activities, where such termination is intended to be permanent; or under other circumstances which the Compensation Committee, in accordance with standards uniformly applied with respect to all similarly
situated employees, designates as a reduction in force. 
 Forfeiture of RSUs. RSUs which are not and do not become vested upon your termination of
employment with the Company for any reason shall, coincident therewith, terminate and be of no further force or effect. 
 In the event that, while you are
employed by the Company or are performing services for or on behalf of the Company under any consulting agreement, (a) you are convicted of (i) a felony or (ii) a misdemeanor involving fraud, dishonesty or moral turpitude, or
(b) you engage in conduct that adversely affects or may reasonably be expected to adversely affect the business reputation or economic interests of the Company, as determined in the sole judgment of the Committee, then all RSUs and all rights
or benefits awarded to you under this Agreement shall be forfeited, terminated and withdrawn immediately upon (1) notice to the Committee of such conviction pursuant to (a) above or (2) final determination pursuant to (b) above
by the Committee. The Committee shall have the right to suspend any and all rights or benefits awarded to you hereunder pending its investigation and final determination with regard to such matters. 

Payment of RSUs. RSUs shall be paid in shares of Company common stock, which shares shall be distributed as soon as administratively practicable, but
in no event later than 30 days, after the applicable Vesting Date. 
 Taxes 

You will realize income in connection with this grant of RSUs in accordance with the tax laws of the jurisdictions applicable to you. 

By acceptance of this Agreement, you agree that any amount which the Company is required to withhold on your behalf, including state income tax and FICA
withholding, in connection with income realized by you under this Agreement will be satisfied by withholding whole units or shares having an aggregate fair market value as equal in value but not exceeding the amount of such required tax withholding,
unless the Committee determines to satisfy the statutory minimum withholding obligation by another method permitted by the Plan. 

 Regardless of the withholding method referred to above, you are liable to the Company for the amount of income
tax which the Company is required to withhold in connection with the income realized by you in connection with this Agreement, and you hereby authorize the Company to withhold such amount, in whole or in part, from subsequent salary payments,
without further notice to you, if the withholding method referred to above is not utilized or does not completely cover such required tax withholding. 

Transferability 
 RSUs granted
hereunder are non-transferable other than by will or by the laws of descent and distribution or pursuant to a qualified domestic relations order. 

Securities and Exchange Commission Requirements 

If you are a Section 16 insider, this type of transaction must be reported on a Form 4 before the end of the second (2nd) business day following the Date of Grant. Please be aware that if you intend to reject the grant, you should do so immediately after the Date of Grant to avoid potential Section 16
liability. Please advise Dennis Edge and Kim Wolford immediately by e-mail, fax or telephone if you intend to reject this grant. Absent such notice of rejection, the Company will prepare and file the required Form 4 on your behalf within the
required two (2) business-day deadline. 
 If you are currently subject to these requirements, you will have already been advised of your status. If
you become a Section 16 insider at some future date, reporting will be required in the same manner noted above. 
 Other
Information 
 Neither the action of the Company in establishing the Plan, nor any provision of the Plan, nor any action taken by the Company, your
employer, the Committee or the Board of Directors under the Plan, nor any provision of this Agreement shall be construed as giving to you the right to be retained in the employ of the Company or any of its subsidiaries or affiliates. 

This award is intended to comply with or be exempt from Section 409A of the Internal Revenue Code of 1986, as amended (“Section 409A”), and
ambiguous provisions, if any, shall be construed in a manner that is compliant with or exempt from the application of Section 409A, as appropriate. 

 Exhibit A 

POLICY NO. 1405-003 — EFFECTIVE DATE: 08/02/13 
  

			
	SUBJECT:	  	Clawback Policy
		
	AFFECTS:	  	McDermott International, Inc. and its subsidiaries and affiliated companies (hereinafter referred to as “the Company”)
		
	PURPOSE:	  	To govern the clawback of certain compensation awarded to executive officers of the Company.
		
	POLICY:	  	If the consolidated financial statements of the Company and its subsidiaries are materially restated within three years of the first public release or filing with the U.S. Securities and Exchange Commission (the “SEC”) of
such financial statements, and the Compensation Committee of the Board of Directors of the Company (the “Committee”) determines, in its reasonable discretion, that (1) any current or former executive officer (as defined in Rule 3b-7
promulgated by the SEC under the Securities Exchange Act of 1934, as amended) of the Company (an “Executive”) has engaged in intentional misconduct and (2) such misconduct caused or partially caused the need for such restatement, then the
Committee may, within 12 months after such a material restatement, require that the executive forfeit and/or return to the Company all or a portion of the compensation vested, awarded or received under any bonus award (including pursuant to the
Company’s Executive Incentive Compensation Plan), equity award (including any award of stock options, shares of restricted stock, deferred stock units or restricted stock units) or other award during the period subject to restatement and the
12-month period following the first public issuance or filing with the SEC of the financial statements that were restated (including, with respect to any such award that is subject to a multi-year vesting period, any compensation vested, awarded or
received thereunder during such vesting period if such vesting period includes all or part of such 12-month period); provided, however, that any forfeiture and/or return of compensation by an Executive under this policy will, in any event, be
limited to any portion thereof that the Executive would not have received if the consolidated financial statements of the Company and its subsidiaries had been reported properly at the time of first public release or filing with the SEC; provided,
further, that this policy shall not apply with respect to any restatement of the consolidated financial statements of the Company and its subsidiaries as to which the need for restatement is determined following the occurrence of a Change in Control
(as defined in the Company’s Director and Executive Officer Deferred Compensation Plan, as amended and restated November 8, 2010).
		
		  	The vesting, payment or other receipt of any rights or benefits awarded by the Company to an Executive which are subject to this policy may be suspended pending an investigation and final determination by the Committee with regard
to any alleged misconduct that may be subject to a determination by the Committee under this policy.

			
		
		  	By accepting any award as to which this policy applies, each Executive must agree to the foregoing and agree to forfeit and/or return compensation to the Company as provided by this policy, as the same may be modified by, or
superseded by a replacement policy adopted by, the Committee, as the Committee may deem necessary to comply with regulations issued by the SEC under the Dodd-Frank Wall Street Reform and Consumer Protection Act. The terms of this policy shall in no
way limit the ability of the Company to pursue forfeiture or reclamation of amounts under applicable law as the Compensation Committee may consider appropriate in its reasonable discretion.

 Interpretation Contact for the above policy is the Senior Vice President, Chief Administration Officer and Senior Vice
President, General Counsel and Corporate Secretary.EX-10.5

 EXHIBIT 10.5 

SEPARATION AGREEMENT 

This Separation Agreement (this “Agreement”) is entered into by and between, and shall inure to the benefit of and be binding
upon, the following parties: 
 JOHN T. McCORMACK, hereinafter referred to as “Employee”; and 

MCDERMOTT, INC., a Delaware corporation, hereinafter referred to as the “Company.” 

W I T N E S S E T H: 

WHEREAS, Employee is currently an employee of the Company; 

WHEREAS, pursuant to a resignation letter in the form attached hereto as Exhibit A, Employee has tendered to McDermott International, Inc., a
Panamanian corporation of which the Company is a wholly owned subsidiary (“MII”), Employee’s resignation from all positions held as an officer, employee, member of the board of directors or board of managers (and member of any
and all committees thereof), of MII and its subsidiaries and joint venture entities, and from any and all positions or capacities with respect to any employee benefit plan sponsored or maintained by any such entity, effective October 31, 2013;
provided that Employee shall remain an employee of the Company until the close of business on November 1, 2013 (the “Resignation Date”); and 

WHEREAS, Employee and the Company mutually desire to establish and agree on the terms and conditions of Employee’s separation from
service; 
 NOW, THEREFORE, in consideration of the premises and the mutual agreements, covenants and obligations set forth herein, and
other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound, Employee and the Company hereby agree as follows: 

Section 1. Termination Date and Type. For purposes of interpreting and applying the provisions of compensation arrangements
and employee benefit plans of MII or any of its subsidiaries (including the Company) applicable to Employee and subject to Section 2 hereof, (a) Employee’s date of termination of employment shall be the Resignation Date,
(b) Employee’s termination of employment is voluntary by Employee and not by the Company, and (c) subject to complying with the requirements of this Agreement, Employee shall be entitled to the compensation and benefits provided in
this Agreement. 
 Section 2. Severance Benefits and Payments. Subject to the execution of this Agreement by Employee and
the lapse of the seven (7) day revocation period referenced in Section 7 hereof (the “Revocation Period”) without revocation of the Agreement or any part hereof by Employee, Employee shall be entitled to receive the
following payments and benefits, to which Employee would not otherwise be entitled, subject to the terms and conditions set forth in this Agreement: 

 (a) each currently outstanding award of MII stock options (Stock Options”),
restricted stock units (“RSUs”) and performance shares (“Performance Shares”) granted to Employee under the 2009 McDermott International, Inc. Long Term Incentive Plan (the “MII LTIP”) which would, absent
Employee’s termination of employment, remain outstanding and, to the extent applicable, continue to vest after the Resignation Date shall remain in full force and effect and, to the extent applicable, continue to vest and shall be settled in
accordance with the terms of the MII LTIP and the applicable grant agreement as if Employee’s employment had continued until October 31, 2015, provided, however, that each outstanding award of RSUs that would continue to vest and be
settled as if Employee’s employment had continued until October 31, 2015, shall vest and be settled on the earlier to occur of March 15, 2014 or the next anniversary of the Grant Date (as defined in the applicable award agreement) for
each such award. Any such Stock Options, whether now vested or upon becoming vested, shall be exercisable until the stated maximum expiration date in the applicable grant agreement notwithstanding any provision in any related grant agreement
providing for earlier termination in the event of a termination of employment. 
 All payments made pursuant to this Section 2 shall be subject to
appropriate tax withholding and are subject to all the terms and conditions of this Agreement. 
 Section 3. Release of Claims.
 
 (a) General Release by Employee. In consideration of the foregoing (including the payments and benefits
under Section 2 hereof, which the Company is not required to make or provide under any preexisting agreement, plan or policy), which Employee hereby expressly acknowledges as good and sufficient consideration for the releases provided below,
Employee hereby unconditionally and irrevocably releases, acquits and forever discharges, to the fullest extent permitted by applicable law, (i) the Company and all of its predecessors, successors and assigns, (ii) all of the
Company’s past, present and future affiliates, parent corporations (including MII), subsidiaries, divisions and joint venture entities and all of their respective predecessors, successors and assigns and (iii) all of the past, present and
future officers, directors, managers, shareholders, investors, employee benefit plan administrators, employees, agents, attorneys and other representatives of each of the entities described in the immediately preceding clauses (i) and (ii),
individually and in their respective representative capacities (the persons or entities referred to in the immediately preceding clauses (i), (ii) and (iii) being, individually, a “Releasee” and, collectively, the
“Releasees”), from any and every action, cause of action, complaint, claim, demand, administrative charge, legal right, compensation, obligation, damages (including consequential, exemplary and punitive damages), liability, cost or
expense (including attorney’s fees) that Employee has, may have or may be entitled to from or against any of the Releasees, whether legal, equitable or administrative, in any forum or jurisdiction, whether known or unknown, foreseen or
unforeseen, matured or unmatured, accrued or not accrued, which arises directly or indirectly out of, or is based on or related in any way to Employee’s employment with or termination of employment from the Company or Employee’s service
for or other affiliation with MII or any of its subsidiaries (including the Company) or joint venture entities, including any such matter arising from the negligence, gross negligence or 

  
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reckless, willful or wanton misconduct of any of the Releasees (together, the “Released Claims”); provided, however, that this Release does not apply to, and
the Released Claims do not include: (i) any claims arising solely and specifically under the U.S. Age Discrimination in Employment Act of 1967 after the date this Agreement is executed by Employee; (ii) any claim for indemnification
(including under MII’s or the Company’s organizational documents or insurance policies) arising in connection with an action instituted by a third party against MII or the Company or any of their affiliates or Employee, in his capacity as
an officer, director, manager, employee, agent or other representative of MII or the Company or any of their affiliates; (iii) any claims for vested benefits under the Company’s 401(k) plan or vested benefits under the McDermott
International, Inc. Director and Executive Deferred Compensation Plan; (iv) any claims relating to Employee’s eligibility to continue participating in health coverage currently available to Employee in accordance with the U.S. Consolidated
Omnibus Reconciliation Act, subject to the terms, conditions and restrictions of that Act; (v) any claim arising from any breach or failure to perform any provision of this Agreement; or (vi) any claim for worker’s compensation
benefits or any other claim that cannot be waived by a general release. 
 (b) Release to be Full and Complete; Waiver of
Claims, Rights and Benefits. The parties intend this Release to cover any and all such Released Claims, whether they are contract claims, equitable claims, fraud claims, tort claims, discrimination claims, harassment claims, whistleblower or
retaliation claims, personal injury claims, constructive or wrongful discharge claims, emotional distress claims, pain and suffering claims, public policy claims, claims for debts, claims for expense reimbursement, wage claims, claims with respect
to any other form of compensation, claims for attorneys’ fees, other claims or any combination of the foregoing, and whether they may arise under any employment contract (express or implied), policies, procedures, practices or by any acts or
omissions of any of the Releasees or whether they may arise under any state, local or federal law, statute, ordinance, rule or regulation, including all Texas employment discrimination laws, the Texas Commission on Human Rights Act, the Texas Labor
Code, all U.S. federal discrimination laws, the U.S. Age Discrimination in Employment Act of 1967, the U.S. Employee Retirement Income Security Act of 1974, Title VII of the U.S. Civil Rights Act of 1964, the U.S. Civil Rights Act of 1991, the
U.S. Rehabilitation Act of 1973, the U.S. Americans with Disabilities Act of 1990, the U.S. Equal Pay Act, the U.S. National Labor Relations Act, the U.S. Fair Labor Standards Act, the U.S. Older Workers Benefit Protection Act, the U.S. Worker
Adjustment and Retraining Notification Act, the U.S. Family and Medical Leave Act, the U.S. Sarbanes-Oxley Act of 2002 or common law, without exception. As such, it is expressly acknowledged and agreed that this Release is a general release,
representing a full and complete disposition and satisfaction of all of the Company’s and any Releasee’s real or alleged legal obligations to Employee, with the only exceptions being as expressly stated in the proviso to Section 3(a)
hereof. Employee understands and agrees, in compliance with any law, statute, ordinance, rule or regulation which requires a specific release of unknown claims or benefits, that this Agreement includes a release of unknown claims, and Employee
hereby expressly waives and relinquishes any and all Released Claims and any associated rights or benefits that Employee may have, including any that are unknown to Employee at the time of the execution this Agreement. 

  
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 (c) Certain Representations of Employee. Employee represents and warrants
that: (i) Employee is the sole and lawful owner of all rights, titles and interests in and to all Released Claims; and (ii) Employee has the fully legal right, power, authority and capacity to execute and deliver this Agreement. 

(d) Covenant Not to Sue. Employee expressly agrees that neither Employee nor any person acting on Employee’s behalf
will file or bring or permit to be filed or brought any lawsuit or other action before any court, agency or other governmental authority for legal or equitable relief against any of the Releasees involving any of the Released Claims. In the event
that such an action is filed against any of the Releasees, Employee agrees that such Releasees are entitled to legal and equitable remedies against Employee, including an award of attorney’s fees. However, it is expressly understood and agreed
that the foregoing sentence shall not apply to any charge filed by Employee with the Equal Employment Opportunity Commission or to any action filed by Employee that is narrowly limited to seeking a determination as to the validity of this Agreement
and enforcement thereof. Should Employee file a charge with the Equal Employment Opportunity Commission, or should any governmental entity, agency or commission file a charge, action, complaint or lawsuit against any of the Releasees based on any
Released Claim, Employee agrees not to seek or accept any resulting relief whatsoever. 
 Section 4. Return of Materials,
Nondisparagement and Cooperation Undertakings. 
 (a) Return of Materials. On or promptly after the
Resignation Date, Employee shall return to MII or the Company, with no request being required of MII or the Company: (i) any and all documents, records, files, reports, memoranda, books, papers, plans, letters and any other data in
Employee’s possession regardless of the medium maintained, held or stored (whether documentary, computer or other electronic storage or other) that relate in any way to the business or operations of MII or the Company or any of their past or
present affiliates, subsidiaries, divisions or joint ventures (such entities being, individually, a “Company Entity” and, collectively, the “Company Entities”) (and Employee shall not retain, recreate or deliver to
anyone else such information); and (ii) any credit cards, keys, access cards, calling cards, computer equipment and software, telephone, facsimile or other equipment or property of any of the Company Entities. 

(b) Nondisparagement. Employee shall refrain from making, directly or indirectly, in any public or private communication
(whether oral, written or electronic), any criticisms or negative or disparaging comments or other statements about the Company or any of the other Releasees, or about any aspect of the respective businesses, operations, financial results or
prospects of any of the Company Entities, including comments relating to Employee’s termination of employment. Notwithstanding the foregoing, it is understood and agreed that nothing in this Section 4(b) or in Section 5 hereof is
intended to prevent Employee from: (i) testifying truthfully in any legal proceeding brought by any governmental authority or other third party or to interfere with any obligation Employee may have to cooperate with or provide information to
any government agency or commission, subject to compliance with the provisions of Section 5(c) hereof, if applicable; (ii) advising Employee’s spouse of the terms and conditions of this Agreement; or (iii) consulting with
Employee’s own legal counsel, as contemplated by Section 7 of this Agreement. 

  
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 (c) Cooperation. Employee agrees to be reasonably available to the Company
Entities or their representatives (including their attorneys) to provide information and assistance as requested by MII or the Company. Such information and assistance may include testifying (and preparing to testify) as a witness in any proceeding
or otherwise providing information or reasonable assistance to the Company Entities in connection with any investigation, claim or suit, and cooperating with the Company Entities regarding any litigation, government investigation, regulatory matter,
claim or other disputed item involving any of the Company Entities that relate to matters within the knowledge or responsibility of Employee during Employee’s employment. Specifically, Employee agrees (i) to meet with the Company
Entities’ representatives, their counsel or other designees at reasonable times and places with respect to any matter within the scope of the foregoing provisions of this Section 4(c); (ii) to provide truthful testimony regarding any
such matter to any applicable court, agency or other adjudicatory body; (iii) to provide the Company Entities with immediate notice of contact or subpoena by any non-governmental adverse party (known to Employee to be adverse to any of the
Company Entities or their interests), and (iv) to not voluntarily assist any such non-governmental adverse party or such non-governmental adverse party’s representatives. Such cooperation required by Employee shall not unreasonably
interfere with Employee’s other business endeavors. 
 (d) Consulting Services. During the period from the
November 2, 2013 through the date that is six-months immediately after the Resignation Date, the “Consulting Period”), Employee shall provide such consulting services to the Company Entities as any of the Company Entities may request
in accordance with the terms and conditions set forth in Exhibit B hereto, which is incorporated by reference in and shall be deemed to form an integral part of this Agreement. The Consulting Period may be extended by written agreement between the
Company and Employee. It is understood and agreed by the parties hereto that in no event will the level of consulting services performed by Employee hereunder exceed 20% of the average level of services (measured by hours) he performed over the
36-month period ending on the Resignation Date (or, if Employee’s period of employment prior to the Resignation Date is a shorter period, then over such shorter period). 

(e) Enforcement. The covenants set forth in the foregoing provisions of this Section 4 may be enforced pursuant to
the provisions of Section 5(f) hereof. 
 Section 5. Confidentiality and Non-Competition Agreement. 

(a) Definition of Trade Secrets and Confidential Business Information. Employee acknowledges and agrees that any and all
non-public information regarding the Company Entities and their customers and suppliers (including any and all information relating to the Company Entities’ respective business plans or practices, products, services, contracts with customers,
backlog, bids outstanding, target projects, financial or 

  
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operational performance, finances, financial accounting policies, practices or systems, internal controls or internal control systems, financial projections or budgets, board of directors or
board committee proceedings, investor relations practices, capital expenditures, equipment, pricing strategies, marketing programs or plans, executive management or other personnel, human resources plans, policies, practices, records or systems,
information technology systems or other business systems, project management, business strategy, profits or overhead) is confidential and the unauthorized disclosure of such confidential information could result in irreparable harm to one or more of
the Company Entities. Such confidential information, in whatever form maintained, held or stored (whether documentary, computer or other electronic storage or other), includes each Company Entity’s proprietary interest in its trade secrets,
including its lists of customers and prospective customers, and other information that has recognized value and that is not generally available through other sources (collectively, “Trade Secrets”), and information regarding each
Company Entity’s various services, projects, products, procedures or systems that is treated as confidential by such Company Entity which may not rise to the level of a Trade Secret (collectively, “Confidential Business
Information”). Confidential Business Information does not include information that properly and lawfully has become generally known to the public other than as a result of any act or omission of Employee. Collectively, Trade Secrets and
Confidential Business Information (and including all the non-public information referred to in the first sentence of this Section 5(a) and all information relating to Employee’s separation from service with the Company) are referred to
herein as “Confidential Information.” 
 (b) Importance of Confidential Information. The parties
hereby agree that Employee has been provided with Confidential Information during the period of Employee’s employment. By signing this Agreement, Employee acknowledges delivery to and receipt by Employee of Confidential Information. Employee
further acknowledges that the preservation and protection of the Confidential Information was an essential part of Employee’s employment with the Company and that Employee has had a duty of fidelity and trust to the Company Entities in handling
the Confidential Information. 
 (c) Nondisclosure or Misuse. Employee agrees that Employee will not disclose or take
away any of the Confidential Information, directly or indirectly, or use such information in any way. Without limiting the generality of the foregoing, Employee will not disclose any of the Confidential Information to any securities analysts,
shareholders, prospective investors, customers, competitors or any other third party, including any third party who has or may express an interest in acquiring any of the Company Entities or all or any significant portion of their respective
outstanding equity securities or assets. If Employee is legally required to disclose any Confidential Information, Employee shall, to the extent not prohibited by applicable law or legal process, promptly notify the Company in writing of such
requirement so that the Company or any of the other Company Entities may seek an appropriate protective order or other relief or waive compliance with the nondisclosure provisions of this Section 5 with respect to such Confidential Information.
To the extent not prohibited by applicable law, Employee agrees to cooperate with and not to oppose any effort by the Company or any other Company Entity to resist or narrow such request or to seek a protective order or

  
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other appropriate remedy. In any such case, Employee will: (i) disclose only that portion of the Confidential Information that, according to written advice of Employee’s counsel, is
required to be disclosed; (ii) use reasonable best efforts to obtain assurances that such Confidential Information will be treated confidentially; and (iii) to the extent not prohibited by applicable law, promptly notify the Company in
writing of the items of Confidential Information so disclosed. The foregoing obligations are in addition to any confidentiality obligations Employee may have under any other agreements or arrangements with any of the Company Entities. 

(d) Return of Confidential Information. On or promptly after the Resignation Date, all documents or other information
containing or referring to any of the Confidential Information as may be in Employee’s possession, or over which Employee may have control, regardless of whether prepared by Employee, shall be returned by Employee to the Company in accordance
with the provisions of Section 4(a) hereof. 
 (e) Noncompetition Agreement. Employee acknowledges and agrees
that information, including the Confidential Information, Employee has acquired will enable Employee to irreparably injure the Company if Employee should engage in competition during the period beginning from the date of this Agreement and extending
through the first anniversary of the Resignation Date (the “Non-Compete Period”). Accordingly, as a material and substantial part of the agreements set forth herein, and particularly in consideration of the waiver or removal of
selling restrictions or forfeiture provisions with respect to, or vesting of, equity-based awards pursuant to Section 2 hereof, Employee hereby agrees that the following covenants are reasonable and necessary covenants for the protection of the
value of the agreements of Employee contained herein: 
 (i) During the Non-Compete Period, Employee shall not, directly or
indirectly, without the prior written approval of the Company’s Chief Executive Officer (which approval shall not be unreasonably withheld), on behalf of the Company, act in any capacity for, be employed by, provide services to, or contract
with any other company or entity engaged in Competing Services (a “Competitive Entity”), or acquire any interest of any type in any Competitive Entity; provided, however, that the foregoing shall not prohibit Employee
from acquiring, solely as an investment and through market purchases, securities of any Competitive Entity which are registered under Section 12(b) or 12(g) of the Securities and Exchange Act of 1934 and which are publicly traded, so long as
Employee is not part of any control group of such Competitive Entity and such securities, including any securities issuable on conversion or exchange of any convertible or exchangeable securities, beneficially owned (as determined in accordance with
Rule 13d-3 under the Securities Exchange Act of 1934) by Employee do not constitute more than one percent of the outstanding voting power of that entity. For the purposes of this Agreement, the phrase “Competing Services” shall mean
any services that are the same as or similar to the services currently being provided or offered by any of the Company Entities, in any case in any of the oil and gas producing regions of the world in which the Company Entities operate. Competing
Services include engineering, procurement, construction and installation services and project management services for offshore oil and gas field development, including any such services related to fixed or floating production facilities, pipelines
or subsea systems. 

  
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 (ii) During the Non-Compete Period, Employee shall not, directly or indirectly,
solicit any Company Entity’s Protected Customers for the purpose of engaging in any business which is the same as or similar to the business in which a Company Entity is engaged. The phrase “Protected Customers” means all
persons or entities to whom a Company Entity has sold, or proposed the sale of, any product or service within the period of three (3) years immediately prior to the Resignation Date. 

(iii) During the Non-Compete Period, Employee shall not, on Employee’s own behalf or on behalf of any other person or
entity, solicit, divert or recruit any person who is, during such time frame, an employee of a Company Entity to leave such employment or in any other manner attempt, directly or indirectly, to influence, induce, or encourage any employee of a
Company Entity to leave the employment of that Company Entity. 
 (f) Enforcement of Covenants. Employee acknowledges
that the injury that would be suffered by the Company Entities as a result of a breach or threatened breach of the provisions of Section 4 hereof or this Section 5 would be immediate and irreparable and that, because of the difficulty of
measuring economic loss of any such breach or threatened breach, an award of monetary damages to the Company Entities for any such breach would be an inadequate remedy. Accordingly, in the event that the Company determines that Employee has breached
or attempted to breach or is threatening to breach any provision of Section 4 hereof or this Section 5, in addition to any other remedies at law or in equity that any of the Company Entities may have available to them, it is agreed that
each of the Company Entities shall be entitled, upon application to any court of proper jurisdiction, to temporary or permanent restraining orders or injunctions against Employee prohibiting such breach or attempted or threatened breach, without the
necessity of: (i) proving immediate or irreparable harm; (ii) establishing that monetary damages are inadequate or that the Company Entities do not have an adequate remedy at law; or (iii) posting any bond with respect thereto. 

(g) Right of Court or Arbitrator to Reform Restrictions. The Company and Employee state that it was their intent to
enter into a valid and enforceable agreement. Employee and the Company hereby acknowledge the reasonableness of the restrictions set forth in this Section 5, including the reasonableness of the geographic area, duration as to time and scope of
activity restrained. Employee agrees that if an arbitrator or court of competent jurisdiction finds that this Section 5 contains limitations as to geographic area, time or scope of activity to be restrained that are not reasonable and impose a
greater restraint than is necessary to protect the goodwill or other business interest of the Company Entities, the arbitrator or court may: (i) reform the covenants to the extent necessary to cause the limitations contained in this
Section 5 as to geographic area, time or scope of activity to be reasonable and to impose a restraint that is not greater than necessary to protect the goodwill or business interests of the Company Entities; and (ii) enforce this
Section 5 as so reformed. 

  
 - 8 - 

 (h) Repayment and Forfeiture. Employee agrees that in the event that
(i) Employee breaches any term of Sections 3 or 4 hereof or this Section 5, or (ii) Employee challenges the validity of all or any part of this Section 5, and all or any part of this Section 5 is found invalid or
unenforceable for any reason whatsoever by a court of competent jurisdiction or an arbitrator in a proceeding between Employee and a Company Entity, in addition to any other remedies at law or in equity the Company may have available to it, the
Company shall not be obligated to make any of the payments and may cease to make such payments or to provide for any of the benefits specified in Section 2 hereof, and shall be entitled to recoup from Employee any and all of the value of the
payments and benefits provided pursuant to Section 2 hereof that have vested or been paid pursuant to that Section. 
 Section 6.
Entire Agreement; Amendment; Third-Party Beneficiaries. Employee and the Company agree and acknowledge that this Agreement contains and comprises the entire agreement and understanding between the parties with respect to the subject matter
hereof, that no other representation, promise, covenant or agreement of any kind whatsoever has been made to cause either party hereto to execute this Agreement, that all agreements and understandings between the parties with respect to the subject
matter hereof are embodied and expressed in this Agreement and that this Agreement supersedes all prior agreements, negotiations, discussions, understandings and commitments, written or oral, between the parties hereto with respect to such subject
matter. The parties also agree that the terms of this Agreement shall not be amended or changed except in writing and signed by Employee and a duly authorized agent of the Company. The parties to this Agreement further agree that this Agreement
shall be binding on and inure to the benefit of Employee and the Company and the Company’s successors and assigns. Except to the extent otherwise provided in this Agreement with respect to the Company Entities and the Releasees (each such
Company Entity and each such Releasee hereby being expressly made a third-party beneficiary of this Agreement), the provisions of this Agreement shall not confer upon any third party any remedy, claim,
liability, reimbursement or other right in excess of those existing without reference to this Agreement. 
 Section 7. Timing and
Consultation with Counsel. Employee acknowledges that Employee has been given a reasonable period of time, not less than twenty-one (21) days, within which to consider this Agreement and has been advised to discuss the terms of this
Agreement with legal counsel of Employee’s own choosing. Employee acknowledges that this Agreement was offered to Employee on October 21, 2013, and Employee was advised that if accepted (i) it must be executed on or prior to
November 11, 2013, and (ii) the Agreement could be revoked, in writing, for up to seven (7) days following the date of such acceptance. If Employee revokes this Agreement, Employee’s resignation shall nevertheless remain
effective. Employee represents that Employee has relied on Employee’s own knowledge and judgment and on the advice of independent legal counsel of Employee’s choosing and has consulted with such other independent advisors as Employee and
Employee’s counsel deemed appropriate in connection with Employee’s review of this Agreement and Employee’s rights with respect to Employee’s separation from service from the Company and other Company Entities and with respect to
this Agreement. Based on Employee’s review, Employee acknowledges that Employee fully and completely understands and accepts all the terms of this Agreement, including the Release in Section 3 hereof, and their legal effects, and Employee
is entering into this Agreement voluntarily and of Employee’s own free will, with full consideration of any and all rights which 

  
 - 9 - 

 
Employee may currently have. Employee further acknowledges that Employee is not relying on any representations or statements made by the Company or any other Company Entity, or by any of their
respective officers, directors, employees, affiliates, agents, attorneys or other representatives, regarding this Agreement, except to the extent such representations are expressly set forth in this Agreement. Employee also acknowledges that
Employee is not relying upon a legal duty, if one exists, on the part of the Company or any other Company Entity, or any of their respective officers, directors, employees, subsidiaries, affiliates, agents, attorneys or other representatives, to
disclose any information in connection with the execution of this Agreement or its preparation, it being expressly understood that Employee shall never assert any failure to disclose information on the part of any such person or entity as a ground
for challenging this Agreement or any provision hereof. 
 Section 8. Applicable Law; Venue. This Agreement shall be interpreted
and construed in accordance with the substantive laws of the State of Texas, without giving effect to any conflicts of laws provisions thereof that would result in the application of the laws of any other jurisdiction. THE EXCLUSIVE VENUE FOR THE
RESOLUTION OF ANY DISPUTE RELATING TO THIS AGREEMENT OR EMPLOYEE’S EMPLOYMENT (EXCEPT FOR ANY DISPUTE THAT MAY BE SUBJECTED TO ARBITRATION BY MUTUAL AGREEMENT OF THE PARTIES HERETO AFTER THE DATE HEREOF) SHALL BE IN THE STATE AND FEDERAL COURTS
LOCATED IN HARRIS COUNTY, TEXAS AND THE PARTIES HEREBY EXPRESSLY CONSENT TO THE JURISDICTION OF THOSE COURTS. 
 Section 9.
Section 409A; Other Tax Matters. This Agreement is intended to provide payments that are exempt from or compliant with the provisions of Section 409A of the U.S. Internal Revenue Code of 1986 (the “Code”) and
related regulations and Treasury pronouncements (“Section 409A”), and the Agreement shall be interpreted accordingly. Notwithstanding any provisions of an RSU to the contrary, no RSU shall be settled by reason of a change in control
of McDermott International, Inc. or disability of Employee unless such event is a change in control or disability, as applicable, within the meaning of Section 409A. Notwithstanding anything herein to the contrary, if on the date of
Employee’s separation from service Employee is a “specified employee,” as defined in Section 409A, then all or a portion of any severance payments, or benefits under this Agreement that would be subject to the additional tax
provided by Section 409A(a)(1)(B) of the Code if not delayed as required by Section 409A(a)(2)(B)(i) of the Code shall be delayed until the first day of the seventh month following Employee’s separation from service date (or, if
earlier, Employee’s date of death) and shall be paid as a lump sum (without interest) on such date. For purposes of this Agreement, a termination of Employee’s employment must be a “separation from service” for purposes of
Section 409A. Employee acknowledges and agrees that Employee has obtained no advice from the Company or any of the other Company Entities, or any of their respective officers, directors, employees, subsidiaries, affiliates, agents, attorneys or
other representatives, and that none of such persons or entities have made any representation regarding the tax consequences, if any, of Employee’s receipt of the payments, benefits and other consideration provided for in this Agreement.
Employee further acknowledges and agrees that Employee is personally responsible for the payment of all federal, state and local taxes that are due, or may be due, for any payments and other consideration received by Employee under this Agreement.
Employee agrees to indemnify the Company and hold the Company harmless for any and all taxes, penalties or other assessments that Employee is, or may become, obligated to pay on account of any payments made and other consideration provided to
Employee under this Agreement. 

  
 - 10 - 

 Section 10. Miscellaneous Provisions.  

(a) Waivers. Any term or provision of this Agreement may be waived, or the time for its performance may be extended, by
the party hereto entitled to the benefit thereof. Any such waiver shall be validly and sufficiently given for the purposes of this Agreement if, as to either party hereto, it is in writing signed by such party or an authorized representative
thereof. Failure on the part of the Company or Employee at any time to insist on strict compliance by the other party with any provisions of this Agreement shall not constitute a waiver of the obligations of either party hereto in respect thereof,
or of either such party’s right hereunder to require strict compliance therewith in the future. No waiver of any breach of this Agreement shall be deemed to constitute a waiver of any other or subsequent breach. 

(b) Severability. If any provision of this Agreement is held to be illegal, invalid or unenforceable under applicable
law, that provision shall be severable and this Agreement shall be construed and enforced as if that illegal, invalid or unenforceable provision never comprised a part hereof, and the remaining provisions hereof shall remain in full force and effect
and shall not be affected by the illegal, invalid or unenforceable provision, and there shall be added automatically as part of this Agreement a provision as similar in its terms to such illegal, invalid or unenforceable provision as may be possible
and be legal, valid and enforceable. 
 (c) Further Assurances. Employee shall, on request by the Company from
time to time after the date hereof, execute, acknowledge and deliver to the Company such other documents and instruments as the Company may require to give effect to the provisions of this Agreement, including a confirmatory release of the Released
Claims as of the Resignation Date. 
 (d) Section Headings. Titles and headings to Sections and subsections hereof are
for the purpose of reference only and shall in no way limit, define or otherwise affect the provisions hereof. 
 (e)
Construction. In this Agreement, unless the context clearly indicates otherwise: (i) words used in the singular include the plural and words used in the plural include the singular; (ii) reference to any gender includes the other
gender and the neuter; (iii) the words “include,” “includes” and “including” shall be deemed to be followed by the words “without limitation”; (iv) the words “shall” and “will”
are used interchangeably and have the same meaning; (v) the word “or” shall have the inclusive meaning represented by the phrase “and/or”; (vi) the words “this Agreement,” “herein,”
“hereunder,” “hereof,” “hereto” and words of similar import shall be deemed references to this Agreement as a whole and not to any particular Section or other provision of this Agreement; (vii) reference to any law
(including statutes and ordinances) means such law (including all rules and regulations promulgated thereunder) as amended, modified, codified or reenacted, in whole or in part, and in effect at the time of determining

  
 - 11 - 

 
compliance or applicability; (viii) relative to the determination of any period of time, “from” means “from and including” and “through” means “through and
including”; and (ix) all references to dollar amounts herein shall be in respect of lawful currency of the United States. The language this Agreement uses shall be deemed to be the language that the parties hereto have chosen to express
their mutual intent, and no rule of strict construction shall be applied against either party hereto. 
 (f) Execution in
Counterparts. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be an original, but all such counterparts shall together constitute one and the same instrument. 

[Signature page follows] 

  
 - 12 - 

 I HAVE READ THE FOREGOING SEPARATION AGREEMENT, I FULLY UNDERSTAND ITS TERMS AND THAT I MAY BE WAIVING
SIGNIFICANT LEGAL RIGHTS BY EXECUTING IT, AND I HAVE VOLUNTARILY EXECUTED IT ON THE DATE WRITTEN BELOW, SIGNIFYING THEREBY MY ASSENT TO, AND WILLINGNESS TO BE BOUND BY, ITS TERMS: 

 

									
	Date: October 29, 2013	 	 	 	 	 	 	 	/s/ John T. McCormack
		 		 		 		 	JOHN T. McCORMACK

 Before me, a Notary Public in and for Harris County, Texas, personally appeared the above-named
Mr. John T. McCormack, who acknowledged that he executed the foregoing instrument for the purposes and consideration therein expressed, and acknowledged the same to be his free act and deed. 

IN TESTIMONY WHEREOF, I have hereunto set my hand and official seal, in the County of Harris and State of Texas, this 29th day of October,
2013. 
  

							
		 		 		 	/s/ Angela Smith
		 		 		 	NOTARY PUBLIC
			
		 		 	McDERMOTT, INC.
				
		 		 	By:	 	/s/ Gary L. Carlson
		 		 		 	Name: Gary L. Carlson
		 		 		 	Title: SVP & CAO

 Before me, a Notary Public in and for Harris County, Texas, personally appeared the above-named officer of
McDermott, Inc., who acknowledged that he executed the foregoing instrument for and on behalf of McDermott, Inc., a Delaware corporation, and for the purposes and consideration therein expressed, and acknowledged the same to be his free act and deed
and the free act and deed of said corporation. 
 IN WITNESS WHEREOF, I have hereunto set my hand and official seal, in the County of Harris
and State of Texas, this 29 day of October, 2013. 
  

							
	 	 	 	 	 	 	/s/ Angela Smith
		 		 		 	NOTARY PUBLIC

  
 - 13 - 

 EXHIBIT A 

Notice of Resignation 
 To the Board of
Directors of McDermott International, Inc. 
 Effective as of the open of business on October 31, 2013, the undersigned, John T. McCormack,
resigns from all positions held as an officer of McDermott International, Inc., a Panamanian corporation (“McDermott”), and from all positions held as an officer, employee, member of the board of directors or board of managers (and member
of any and all committees thereof) of any of McDermott’s subsidiaries (whether corporations, limited liability companies, limited partnerships or other forms of entity) and joint venture entities, and from any and all positions or capacities
with respect to any employee benefit plan sponsored or maintained by any such entity; provided, however, that the effectiveness of this resignation from employment with McDermott, Inc., a Delaware corporation and a wholly owned subsidiary of
McDermott, shall not be effective until the close of business on November 1, 2013. This resignation is not subject to any condition to effectiveness (including, but not limited to, acceptance by the Board of Directors of McDermott) and is
irrevocable. 
 Dated: October 29, 2013 
  

	
	 /s/ John T. McCormack

	John T. McCormack

 EXHIBIT B 

CONSULTING SERVICES 

TERMS AND CONDITIONS 
  

	1.	Description of Services. As requested by the MII or the Company, John T. McCormack (“Consultant”) shall serve as a special consultant furnishing advice, consultation and related services
including, but not limited to, special assignments as determined by the President and Chief Executive Officer of MII or his designee. 

  

	2.	Status. During the Consulting Period, Consultant shall be an independent contractor and shall not be an employee of MII, the Company or any of the other Company Entities. None of the Company Entities shall be
entitled to exercise supervision over the details or methods of performance by Consultant hereunder or to require adherence to specific procedures in performing services hereunder, other than procedures or policies to the extent applicable to all
independent contractors and consultants of the Company Entities on a general basis, including the most recent McDermott International, Inc. Code of Business Conduct. Except as provided herein, Consultant shall not be subject to rules or regulations
applicable to employees of the Company Entities or any established work schedule or routine or other supervision of or direction by any of the Company Entities, as to hours worked or otherwise; provided, however, that all services rendered hereunder
shall be so rendered in a diligent, prudent and competent manner and to the satisfaction of MII and the Company. Consultant shall not have authority to obligate any of the Company Entities to any agreement or to exercise any supervision or direction
over any employees of any of the Company Entities. Since Consultant is not an employee of the Company, Consultant is not hereby entitled to participate in any of the Company’s employee benefit plans, programs or arrangements; provided, however,
the retirement and other payments or benefits that Consultant may be entitled to as a result of previous employment with the Company shall continue uninterrupted in accordance with the terms and conditions of each respective benefit plan or
arrangement. 

  

	3.	Compensation. Consultant’s individual contact shall be the President and Chief Executive Officer of MII or his designee, who shall be responsible for transmitting requests for such advice and consultation
from the Company Entities where necessary to enable Consultant to carry out Consultant’s responsibilities hereunder. During the Consulting Period, the Company agrees to pay Consultant $4,500 per day for each day that he performs consulting
services to the Company Entities as requested by MII or the Company during the Consulting Period (“Consulting Fees”). The Company also agrees to reimburse Consultant for reasonable costs and expenses of airfare and other travel,
meals and lodging actually incurred by Consultant in performance of consulting services hereunder, in accordance with the then-operative and applicable policies of MII and the Company, and reasonable administrative costs, such as costs for telephone
calls, internet usage, printing, etc., necessarily incurred by Consultant in rendering consulting services hereunder, but not any other fees, costs, or expenses. Consultant shall submit a statement for each month in which consulting services are
rendered, showing costs, expenses and days worked with respect to services rendered during such month, along with documentation substantiating expenses for which reimbursement is sought. The Company agrees to remit to Consultant the appropriate
amount promptly following receipt of such statements. Consultant will be responsible for income or other taxes assessed on Consultant’s receipt of fees and expense reimbursements from the Company. 

	4.	Security and Non-Disclosure of Information. Consultant shall be responsible for, and bear the expense of, compliance with governmental laws and regulations applicable to the procurement, utilization or production
of information in connection with the furnishing of services hereunder. Consultant agrees that, during the Consulting Period, Consultant will refrain from performing any act or engaging in any course of conduct which has or may reasonably have the
effect of demeaning the name or business reputation of the Company or affects adversely or may reasonably affect adversely the Company’s best interests, economic or otherwise. Consultant also acknowledges that applicable securities laws
prohibit the trading of Company securities while in possession of any material non-public information, including information concerning the financial condition, results of operations, business or prospects of MII and its subsidiaries.

  

	5.	Property and Information. All property and information, including but not limited to reports, findings, recommendations, plans, data, and memoranda of every description, and all copies thereof, furnished to
Consultant or developed in the course of or relating to the services rendered hereunder shall be the property of the applicable Company Entities, and Consultant shall not retain copies of any such matter or material. Consultant agrees that all
inventions, discovery or improvements (whether patentable or not) made or conceived by Consultant are and will remain the sole property of the applicable Company Entities, and Consultant further agrees to assist the applicable Company Entities in
obtaining patents in their names covering any such inventions, discoveries or improvements. 

  

	6.	Law. Consultant will comply with all applicable laws and regulations in the course of Consultant’s activities on behalf the Company Entities. 

 

	7.	Code of Business Conduct. Consultant expressly acknowledges that Consultant has received and reviewed the most recent McDermott International, Inc. Code of Business Conduct, and Consultant will conform
Consultant’s activities undertaken for or on behalf of the Company Entities consistent with the principles of the highest ethical behavior as described therein. 

 

									
	Signature:	 	 /s/ John T. McCormack
	 		 	Date:	 	October 29, 2013
		 	John T. McCormack	 		 		 	

  

	8.	Reports. Consultant agrees that, upon request, Consultant will file periodic reports on Consultant’s activities on behalf the Company Entities. 

 

	9.	Indemnity. The Company agrees to protect, hold harmless, defend, and indemnify Consultant from and against any and all claims, suits, and demands, of any kind whatsoever, by whomsoever asserted, as a result of,
or arising from, the consulting services provided by Consultant under this Agreement to the Company Entities; provided, however, that the Company shall have no liability or responsibility under this provision for any such claim, suit, or demand
resulting from the gross negligence or intentional misconduct of Consultant. 

	10.	Conflict of Interest. Consultant agrees that Consultant is not presently engaged and will not engage during the term of this Consulting Agreement in any activity which might reasonably create a conflict of
interest between Consultant and any of the Company Entities or which might reasonable and adversely affect Consultant’s judgment with respect to the business of the Company Entities. Consultant further agrees that Consultant will accept no
payment from any competitor or supplier of materials or services, customer, borrower, or lender of the Company Entities. 

  

	11.	Consulting Period. The Consulting Period shall begin on November 2, 2013 and continue through April 30, 2014, unless terminated earlier by Consultant upon thirty (30) days advance written notice to
the Company or extended by the mutual written agreement of the Company and Consultant. The Consulting Period will be terminated without further liability or obligation on the part of the Company should Consultant breach any of the terms or covenants
of this Agreement (including this Exhibit B).

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