Document:

Supplemental Executive Retirement Plan

 Exhibit 10.10 

Supplemental Executive Retirement Plan 

of The Babcock & Wilcox Company 

Effective July 30, 2010 

ARTICLE I 

Purpose 

1.1 Purpose of Plan. The purpose of this Supplemental Executive Retirement Plan of The Babcock & Wilcox Company
(the “Plan”) is to advance the interests of The Babcock & Wilcox Company, its subsidiaries and affiliates by providing certain retirement benefits that will attract and retain highly qualified key employees accountable for the
successful conduct of its business. 
 1.2 ERISA Status. The Plan is governed by the Employee Retirement Income
Security Act of 1974, as amended (“ERISA”). It has been designed to qualify for certain exemptions under Title I of ERISA that apply to plans that are unfunded and maintained primarily for the purpose of providing deferred compensation for
a select group of management or highly compensated employees. The Plan is intended to comply with Section 409A of the Internal Revenue Code of 1986, as amended, and regulations and rulings issued thereunder. 

1.3 Effective Date. The effective date of this Plan is July 30, 2010. 

ARTICLE II 

Definitions and Construction 

Definitions. Where the following words and phrases appear in the Plan, they shall have the respective meanings set
forth below, unless their context clearly indicates to the contrary. 
  

	 	2.1	Account. Collectively, means the Participant’s Company Account and the Participant’s Deferral Account. 

 

	 	2.2	 Account Value. At any given time, the sum of all amounts credited to the Participant’s Account, adjusted for any income, gain or
loss and any payments attributable to such account. The opening Account Value on the Effective Date of a Participant who was a participant in the McDermott International, Inc. New Supplemental Executive Retirement Plan (the “MII SERP”) on
the day before the Effective Date (a “MII SERP Participant”) shall be equal to his account value in the MII SERP 

 

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determined as of the close of business on the last business day immediately preceding the Effective Date. 

 

	 	2.3	Beneficiary. The person designated by each Participant, on a form provided by the Company for this purpose, to receive the Participant’s distribution
under Article VI in the event of the Participant’s death prior to receiving complete payment of his Account. In order to be effective under this Plan, any form designating a Beneficiary must be delivered to the Committee before the
Participant’s death. In the absence of such an effective designation of a Beneficiary, “Beneficiary” means the Participant’s spouse, or if there is no spouse on the date of the Participant’s death, the Participant’s
estate, or heirs at law if there is no administration of the Participant’s estate. 

  

	 	2.4	Board. The Board of Directors of The Babcock & Wilcox Company or the board of directors of a company that is a successor to the Company.

  

	 	2.5	Bonus. Any bonus paid to a Participant under any plan, policy or program of the Company providing for the payment of annual bonuses to employees or any
extraordinary payment paid to a Participant if such payment is designated by the Committee to be a Bonus for purposes of this Plan. 

  

	 	2.6	Cause. Cause means: 

  

	 	(a)	the overt and willful disobedience of orders or directives issued to a Participant that are within his scope of duties, or any other willful and continued failure of a
Participant to perform substantially his duties with the Company (occasioned by reason other than physical or mental illness or disability) after a written demand for substantial performance is delivered to the Participant by the Committee or the
Chief Executive Officer of the Company which specifically identifies the manner in which the Committee or the Chief Executive Officer believes that the Participant has not substantially performed his duties, after which the Participant shall have
thirty days to defend or remedy such failure to substantially perform his duties; 

  

	 	(b)	the willful engaging by the Participant in illegal conduct or gross misconduct which is materially and demonstrably injurious to the Company; or

  

	 	(c)	the conviction of the Participant with no further possibility of appeal or, or plea of nolo contendere by the Participant to, any felony or crime of falsehood.

  

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 The cessation of employment of a Participant under subparagraph (a) and (b) above
shall not be deemed to be for “Cause” unless and until there shall have been delivered to him a copy of a resolution duly adopted by the affirmative vote of not less than three-quarters (3/4) of the entire membership of the Committee
at a meeting of such Committee called and held for such purpose (after reasonable notice is provided to the Participant and the Participant is given an opportunity to be heard before the Committee), finding that, in the good faith opinion of the
Committee, the Participant is guilty of the conduct described in subparagraph (a) or (b) above, and specifying the particulars thereof in detail. 
  

	 	2.7	Change in Control. A change in control shall occur when: 

  

	 	(a)	any person (other than a trustee or other fiduciary holding securities under an Employee benefit plan of the Company or a corporation owned, directly or indirectly, by
the stockholders of the Company in substantially the same proportions as their ownership of stock of the Company) is or becomes the beneficial owner, directly or indirectly, of securities of the Company representing thirty percent (30%) or more
of the combined voting power of the Company’s then outstanding voting securities; 

  

	 	(b)	during any period of two (2) consecutive years (not including any period prior to the execution of this Plan), individuals who at the beginning of such period
constitute the Board of the Company, and any new director of the Company (other than a director designated by a person who has entered into an agreement with the Company to effect a transaction described in Clauses (a) or (c) of this
Paragraph (7) whose election by the Company’s Board or nomination for election by the stockholders of the Company, was approved by a vote of at least two-thirds (2/3) of the Directors of the Company’s Board, then still in office
who either were Directors thereof at the beginning of the period or who election or nomination for election was previously so approved, cease for any reason to constitute a majority thereof: 

 

	 	(c)	 the shareholders of the Company approve a) a merger or consolidation of the Company, with any other corporation, other than a merger or consolidation
which would result in the voting securities of the Company outstanding immediately prior thereto, continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity) at least fifty percent
(50%) of the combined voting power of the voting securities of the Company or such surviving entity outstanding immediately after such merger or consolidation, or b) the shareholders of the Company approve a plan of complete

  

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liquidation of the Company, or c) an agreement for the sale or disposition by the Company of all or substantially all of the Company’s assets; or 

 

	 	(d)	Such other circumstances as may be deemed by the Board in its sole discretion to constitute a change in control of the Company. 

However, in no event shall a “Change In Control” be deemed to have occurred with respect to a Participant if the
Participant is part of the purchasing group which consummates the Change-In-Control transaction. A Participant shall be deemed “part of a purchasing group” for purposes of the preceding sentence if the Participant is an equity participant
in the purchasing company or group (except for: (i) passive ownership of less than three percent (3%) of the stock of the purchasing company; or (ii) ownership of equity participation in the purchasing company or group which is
otherwise not significant, as determined prior to the Change in Control by a majority of the non-employee continuing directors). 
  

	 	2.8	Code. The Internal Revenue Code of 1986, as amended. 

  

	 	2.9	Committee. The Compensation Committee of the Board, or such other administrative committee that is appointed by the Board to administer the Plan.

  

	 	2.10	Company. The Babcock & Wilcox Company and except where the context clearly indicates otherwise, shall include the Company’s subsidiaries and
affiliates, as well as any successor to any such entities. 

  

	 	2.11	Company Account. The notional account maintained by the Committee reflecting each Participant’s Company Contributions, together with any income, gain
or loss and any payments attributable to such account. 

  

	 	2.12	Company Contribution. The total contributions credited to a Participant’s Company Account for any one Plan Year pursuant to the provisions of
Section 4.1 or 4.2. 

  

	 	2.13	Compensation. The salary, wages and other cash remuneration received by a Participant during any Plan Year or in respect of employment with the Company,
including any contributions made to a plan described in Sections 125, 132(f) or 401(k) of the Code pursuant to a salary reduction agreement entered into between a Participant and the Company and Bonuses, and amounts, if any, deferred by the
Participant under this Plan, but excluding cash payments under the Company’s 2010 Directors and Officers Long Term Incentive Plan and any successor plan thereto and other additional remuneration in any form. 

 

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	 	2.14	Deemed Investments. With respect to any Account, the hypothetical investment options with respect to which such Account is deemed to be invested for
purposes of determining the value of such Account under this Plan, as selected from time to time by the Committee in its discretion. 

  

	 	2.15	Deferral Account. The notional account maintained by the Committee reflecting each Participant’s Deferral Contributions, together with any income,
gain or loss and any payments attributable to such amount. 

  

	 	2.16	Deferral Contribution. The Compensation deferred by a Participant pursuant to Section 4.3 and credited to a Participant’s Deferral Account
pursuant to Section 4.3. 

  

	 	2.17	Disabled. A Participant will be considered Disabled if the Committee determines in its sole discretion that the Participant is unable to engage in any
substantial gainful activity by reason of any medically determinable physical or mental impairment that is expected to last for a continuous period of not less than twelve (12) months. 

 

	 	2.18	Eligible Employee. The Company’s CEO and any officers of the Company and its subsidiaries and affiliates. 

 

	 	2.19	ERISA. The Employee Retirement Income Security Act of 1974, as amended. 

 

	 	2.20	Exchange Act. The Securities Exchange Act of 1934, as amended. 

 

	 	2.21	Participant. An Eligible Employee who has been selected by the Committee as a Participant in the Plan until such Eligible Employee ceases to be a
Participant in accordance with Article III of the Plan. 

  

	 	2.22	Plan Year. The twelve-consecutive month period commencing on January 1 of each year. 

 

	 	2.23	Retirement. Separation from Service with the Company on or after the first day of the calendar month coincident with or following the Participant’s
attainment of the age of 65. 

  

	 	2.24	Separation from Service. A Separation from Service occurs on the date a Participant dies, retires or otherwise has a termination of employment with the
Company. A termination of employment occurs on the date after which the Participant and the Company reasonably anticipate that no further services will be performed by the Participant or that the level of bona fide services reasonably anticipated to
be performed after such date will permanently decrease to 49% or less of the average level of bona fide services provided in the immediately preceding thirty-six months. 

 

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	 	2.25	Specified Person. Specified Person shall have the meaning set forth in Code Section 409A(a)(2)(B)(i) and regulations and ruling promulgated
thereunder. 

  

	 	2.26	Unforeseeable Emergency. A severe financial hardship to the Participant resulting from an illness or accident of the Participant, the Participant’s
spouse, the Participant’s Beneficiary, or the Participant’s dependent (as defined in Section 409A of the Code); loss of the Participant’s property due to casualty; or other similar extraordinary and unforeseeable circumstances
arising as a result of events beyond the control of the Participant. Whether a Participant is faced with an Unforeseeable Emergency is to be determined by the Committee in its sole discretion, based on the relevant facts and circumstances of each
case. In any case, a distribution on account of Unforeseeable Emergency may not exceed the amount necessary to relieve the emergency, plus amounts necessary to pay taxes reasonably anticipated as a result of the distribution, after taking into
account the extent that the emergency may be relieved through reimbursement or compensation from insurance or otherwise, by liquidation of the Participant’s assets, to the extent the liquidation of such assets would not itself cause severe
financial hardship, or by cessation of deferrals under the Plan. 

  

	 	2.27	Vested Account. The sum of the Participant’s vested Company Account and the Participant’s Deferral Account. 

 

	 	2.28	Vested Percentage. The percentage as to which a Participant is vested in his or her Company Account as determined under Sections 5.4 and 5.5.

  

	 	2.29	Years of Participation. The sum of whole Plan Years of participation in the Plan as an active employee in continuous employment, excluding
fractional years. With respect to Eligible Employees who become Participants as of the Effective Date and were participants in the MII SERP on the day before the Effective Date, Years of Participation in the Plan shall be determined by including
periods of participation in the MII SERP as an active employee. 

  

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 ARTICLE III 

Participation 

The Committee, in its sole discretion, shall select and notify in writing those Eligible Employees of the Company who shall participate
in the Plan. An Eligible Employee who has been selected by the Committee as a Participant shall begin participation in the Plan effective on the date specified by the Committee in its notification and shall continue to participate in the Plan until
the earlier of (a) the date the Committee notifies the Participant that he is no longer eligible to participate in the Plan or (b) the date of his Separation from Service. A Participant who ceases to participate in the Plan pursuant to
(a) of the preceding sentence shall be treated as if he had terminated employment with the Company but (i) his benefit, if any, shall not be payable until after his Separation from Service, and (ii) his Vested Account shall be
adjusted as provided in Article V. An Eligible Employee who is rehired by the Company following his Separation from Service shall become a Participant only if such Eligible Employee is again selected to participate in the Plan by the Committee.

 ARTICLE IV 

Contributions 

4.1 Annual Company Contribution. As of the first day of each Plan Year, the Company shall declare a contribution
percentage for each Participant’s Company Account. The contribution percentage declared for a Participant may, but need not be, the same as the contribution percentage declared for other Participants. Company Contributions shall be credited as
a bookkeeping entry as of the first day of the Plan Year or at other such times as determined by the Committee to each Participant’s Company Account, in an amount equal to the contribution percentage declared for the Participant multiplied by
the Participant’s Compensation received during the prior Plan Year. 
 4.2 Discretionary Company
Contribution. The Committee may in its sole discretion at any time make an extraordinary contribution to the Company Account of any Participant. 

4.3 Participant Deferrals. For any Plan Year, the Committee may, in its sole discretion, allow a Participant to elect to
defer the payment by the Company of any whole percentage (or dollar amount) of his annual base salary that would otherwise be paid during such Plan Year and/or of any whole percentage (or dollar amount) of any Bonus earned during such Plan Year, and
instead have such amounts credited as a bookkeeping entry to his Deferral Account. The Compensation otherwise payable to the Participant shall be reduced by the amount the Participant elected to have contributed to the Participant’s Deferral
Account, which shall be a Deferral Contribution. 
  

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 4.4 Participant Elections. Prior to the first day of each
Plan Year, a Participant shall file a written election with the Committee specifying (i) the type(s) and amount(s) of Compensation that he wishes to defer pursuant to Section 4.3, if Deferral Contributions are permitted by the Committee
for the relevant Plan Year, (ii) the payment date or payment commencement date pertaining to the portion of his Vested Account that is attributable to contributions made in the relevant Plan Year, and (iii) the form of payment of the
portion of his Vested Account that is attributable to contributions made in the relevant Plan Year. Such election with respect to any Plan Year must be filed with the Committee no later than the last day of the immediately preceding Plan Year;
provided however, that an election made by a new Participant who is first eligible to participate in the Plan may be made no later than the
30th day following the date on which he is initially
eligible to participate in the Plan but only with respect to Compensation earned after the effective date of such election. If Deferral Contributions are permitted, a Participant may elect to defer up to 50% of his annual Salary and/or up to 100% of
any Bonus earned in any Plan Year. 
 Except as set forth in Section 6.3, a Participant shall not be permitted to change his election with
respect to the timing or form of payment and any election made hereunder shall not apply with respect to prior Plan Years. Failure to make a timely Deferral Contribution election will result in no Deferral Contributions for the relevant Plan Year.
If a Participant fails to make a timely election specifying time and form of payment, payment of the portion of the Participant’s Vested Account that is attributable to contributions made in the relevant Plan Year shall be paid in accordance
with Section 6.4. 
 Participant elections made with respect to the portion of a Participant’s Account attributable to contributions
to the MII SERP prior to the Effective Date shall continue in full force and effect. 
 4.5 Suspension
of Deferral Contributions. Except as provided below, an election to make Deferral Contributions in a Plan Year shall be irrevocable on the last day of the immediately preceding Plan Year. To the extent expressly permitted under Code
Section 409A and regulations and rulings issued thereunder, a Participant’s deferral election shall be suspended during any unpaid leave of absence granted in accordance with Company policies; provided, however that such deferral election
shall become fully operative as of the first day of the payroll period commencing coincident with or next following the Participant’s return to active employment following termination of the approved unpaid leave in the Plan Year to which the
Participant’s deferral pertains. In the event of an Unforeseeable Emergency, a Participant shall suspend deferrals in order to relieve the emergency, provided that the deferrals must be suspended for the entire remainder of the Plan Year. In
the event of a Disability, the Participant may suspend deferrals by the later of the end of the taxable year of the Company in which the Disability arises, or the
15th of the third month following the date that the
Disability arises. 
  

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 ARTICLE V 

Accounts 

5.1 Company Accounts. The Committee shall establish and maintain an individual bookkeeping account for each
Participant, which shall be the Participant’s Company Account. A separate “Company Sub Account” may be maintained for each Participant for each Plan Year in respect of which Company Contributions are credited under the Plan for the
benefit of the Participant. The Committee shall credit the amount of each Company Contribution made on behalf of a Participant to such Participant’s Company Account pursuant to Section 4.1 and 4.2. The Committee shall further debit and/or
credit the Participant’s Company Account with any income, gain or loss based upon the performance of the Deemed Investments selected by the participant and any payments attributable to such account on a daily basis, or at such other times as it
shall determine appropriate. The sole purpose of the Participant’s Company Account is to record and reflect the Company’s Plan obligations related to Company Contributions to each Participant under the Plan. The Company shall not be
required to segregate any of its assets with respect to Plan obligations nor shall any provision of the Plan be construed as constituting such segregation. 

5.2 Deferral Accounts. The Committee shall establish and maintain an individual bookkeeping account for each
Participant, which shall be the Participant’s Deferral Account. A separate “Deferral Sub Account” may be maintained for each Participant for each Plan Year in respect of which Deferral Contributions are credited under the Plan for the
benefit of the Participant. The Committee shall credit the amount of each Deferral Contribution made on behalf of a Participant to such Participant’s Deferral Account as soon as administratively feasible following the applicable deferral. The
Committee shall further debit and/or credit the Participant’s Deferral Account with any income, gain or loss based upon the performance of the Deemed Investments selected by the Participant and any payments attributable to such Account on a
daily basis, or at such other times as it shall determine appropriate. The sole purpose of the Participant’s Deferral Account is to record and reflect the Company’s Plan obligations related to Deferral Contributions of each Participant
under the Plan. The Company shall not be required to segregate any of its assets with respect to Plan obligations, nor shall any provision of the Plan be construed as constituting such segregation. 

5.3 Hypothetical Accruals to the Account. In accordance with procedures established by the Committee and subject to this
Section 5.3, the Participant may designate the Deemed Investments with respect to which his or her Account shall be deemed to be invested. If a Participant fails to make a proper designation, then his Account shall be deemed to be invested in
the Deemed Investments designated by the Committee in its sole discretion. A Participant may change such designation with respect to future Company and Deferral Contributions, as well as amounts, already credited to his Account in accordance with
procedures established by the Committee. A copy of any available prospectus or other disclosure materials for each of the Deemed 

 

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Investments shall be made available to each Participant upon request. The Committee shall determine from time to time each of the Deemed Investments made available under the Plan and may change
any such determinations at any time. Nothing herein shall obligate the Company to invest any part of its assets in any of the investment vehicles serving as the Deemed Investments. 

5.4 Vesting of Company Account. A Participant’s vested percentage with respect to the Participant’s Company
Account, adjusted by any income, gain or loss and any payments attributable thereto, shall be the lesser of i) twenty percent times the Participant’s Years of Participation, and ii) 100%. Except as provided in Section 5.5, upon Separation
from Service or cessation of Plan participation, whichever is earlier, a Participant shall forfeit all amounts credited to his Account other than his Vested Account value determined as of the close of business coincident with or next following the
date on which the Participant separated from service or ceased to participate in the Plan, as applicable, provided, however, that amounts not so forfeited shall continue to be debited and credited in accordance with Section 5.3 from and after
Separation from Service. 
 5.5 Accelerated Vesting. The vesting provisions above notwithstanding, the Participant
shall have a Vested Percentage of 100% for his entire Account upon the soonest of the following to occur during the Participant’s employment with the Company: (i) the date of Separation from Service as a result of the Participant’s
death or disability or termination by the Company for reasons other than Cause, (ii) the Participant’s Disability, (iii) the Participant’s Retirement, (iv) the date a Change in Control occurs, or (v) under such other
circumstances as the Committee may determine in its sole discretion. Each Participant who was a participant in the MII SERP on December 31, 2008 shall have a vested percentage of 100% with respect to amounts allocated to his Account that are
attributable to amounts allocated to his MII SERP Account as of December 31, 2008 and future gains and losses thereon. 

5.6 Vesting of Deferral Account. A Participant’s Vested Percentage with regard to his Deferral Account shall at all
times be 100%. 
 5.7 Nature and Source of Payments. The obligation to make distributions under this Plan
with respect to each Participant and any Beneficiary in accordance with the terms of this Plan shall constitute a liability of the Company which employed the Participant when the obligation was accrued, and no other Company shall have such
obligation and any failure by a particular Company to live up to its obligation under this Plan shall have no effect on any other Company. All distributions payable hereunder shall be made from the general assets of the Company, and nothing herein
shall be deemed to create a trust of any kind between the Company and any Participant or other person. No special or separate fund shall be established nor shall any other segregation of assets be made to assure that distributions will be made under
this Plan. No Participant or Beneficiary shall have any interest in any particular asset of the Company by virtue of the existence of this Plan. Each Participant and Beneficiary shall be an unsecured general creditor of the Company. 

 

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 5.8 Statements to Participants. Periodically as determined by the Committee,
but not less frequently than annually, the Committee shall transmit to each Participant a written statement regarding the Participant’s Account for the period beginning on the date following the effective date of the preceding statement and
ending on the effective date of the current statement. 
 ARTICLE VI 

Payment of Benefits 

6.1 Occasions for Distributions. The Company shall distribute a Participant’s Vested Account following the events and
in the manner set forth in this Article VI. A Participant’s Vested Account shall be debited in the amount of any distribution made from the Account as of the date of the distribution. The occasions for distributions shall be (i) the
Participant’s Separation From Service, including upon Retirement or death, (ii) Disability, (iii) the occurrence of an Unforeseeable Emergency, or (iv) the completion of fixed period of deferral. 

6.2 Distribution Elections. A Participant shall elect the time and form of payment of his Vested Account in the manner set
forth in Section 4.4. A Participant who fails to timely file a distribution election for a Plan Year shall be deemed to have elected to receive the portion of his Vested Account attributable to the relevant Plan Year in a single lump sum
payment within 30 days after his Separation from Service, or on the first day of the seventh month following his Separation from Service if he is a Specified Person as of the date of the Separation from Service. If a Participant’s Vested
Account is less than $50,000, it will be distributed in a single lump sum distribution irrespective of any election to the contrary. 

6.3 Change of Former Timing of Payments. A Participant may make a subsequent election no later than twelve months prior to
the date that he would be eligible to receive a distribution under the Plan, to change the timing and form of payment of the distribution; provided, however, that the payment, or first payment in the case of a series of payments, under the
subsequent election shall be deferred to a date that is at least five (5) years after the date the Participant would have been eligible to receive, or begin receiving, the distribution under the prior election. To be effective, any such
election must be in writing timely and received by the Committee, and cannot be effective for at least twelve months after the date on which the election is made. The requirement in this Section 6.3 that the first payment with respect to which
any election thereunder applies must be deferred for at least five (5) years shall not apply to a payment on account of the Participant’s death, Disability or in the event of an Unforeseeable Emergency. Notwithstanding the provisions of
this Section 6.3, for subsequent distribution elections made in 2008 only, the five year delay shall not be applicable, so long as the distribution is not payable in 2008 under the prior election, and the subsequent election does not schedule
the distribution until after December 31, 2008. 
  

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 6.4 Distribution on Account of Separation from Service or Disability. Subject
to Section 6.8, upon a Participant’s Disability or Separation from Service, the Company shall distribute, or begin distributing, to the Participant (or the Participant’s Beneficiary) within a reasonable period of time (not to exceed
30 days after such separation), the Participant’s Vested Account. Such distribution(s) shall be in the form specified on the distribution election form(s) filed with the Committee that covers the relevant Vested Account. If no effective
election form exists, the distribution shall be distributed in the form of a lump sum payment equal to the relevant portion of the Participant’s Vested Account. 

6.5 Continuation of Hypothetical Accruals to the Vested Account After Commencement of Distributions. If any Vested Account
of a Participant is to be distributed in a form other than a lump sum, then such Vested Account shall continue to be adjusted for hypothetical income, gain or loss and any payment or distributions attributable to the Vested Account as described in
Section 5.1, and 5.2, until the entire Vested Account has been distributed. 
 6.6 Unforeseeable
Emergency Distribution. In the event that the Committee, upon the written request of a Participant, determines in its sole discretion that such Participant has incurred an Unforeseeable Emergency, as defined in Section 2.26, such
Participant may be entitled to receive a distribution of part or all of the Participant’s Vested Account, in an amount not to exceed the lesser of (a) the amount determined by the Committee under Section 2.26, or (b) the
value of such Participant’s Vested Account at the time of the emergency. Such amount shall be paid in a single lump sum payment as soon as administratively practicable after the Committee has made its determination with respect to the
availability and amount of such distribution; provided, however, that the payment shall not be made after the later of the end of the taxable year of the Company in which the Unforeseeable Emergency arises or the
15th day of the third month following the date of the
occurrence of the Unforeseeable Emergency. If a Participant’s Account is deemed to be invested in more than one Deemed Investment, such distribution shall be made pro rata from each of such Deemed Investments. For purposes of the foregoing,
such distribution shall be made from the Participant’s Account beginning with the oldest Account in the following order: First, such amount shall be debited from the Participant’s Deferral Account, and second, from the
Participant’s Company Account (subject to forfeitures with respect to the non-vested portion of the Company Account utilized for such distribution). 

6.7 Distribution on Account of Completion of a Fixed Deferral Period. At the time of a Participant’s election to
participate in the Plan, the Participant may elect to receive the Distribution of a Participant’s Vested Account (established only in respect of the relevant Plan Year), or any applicable Vested Plan Year Company Sub-Account or Plan Year
Deferral Sub-Account on the completion of a fixed deferral period elected by the Participant on forms provided by the Committee. 
  

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 6.8 Limitation on Distributions to Certain Key Employees. Notwithstanding any
other provision of the Plan to the contrary, to the extent that a Participant is a Specified Person and the Participant’s distribution is on account of any reason other than death or Disability distributions may not be made before the date
which is six months after the date of the Separation from Service. Payments to which the Participant would otherwise be entitled during the six-month period described above shall be delayed and paid in a lump sum on the first day of the seventh
month after the date of his Separation from Service. 
 ARTICLE VII 

Committee 

7.1 Authority. The Committee has full and absolute discretion in the exercise of each and every aspect of the rights,
power, authority and duties retained or granted it under the Plan, including without limitation, the authority to determine all facts, to interpret this Plan, to apply the terms of this Plan to the facts determined, to make decisions based upon
those facts and to make any and all other decisions required of it by this Plan, such as the right to benefits, the correct amount and form of benefits, the determination of any appeal, the review and correction of the actions of any prior
administrative committee, and the other rights, powers, authority and duties specified in this Article and elsewhere in this Plan. The Committee may correct any defect or supply any omission or reconcile any inconsistency in this Plan or any
agreement or document related to this Plan in the manner and to the extent the Committee deems necessary or appropriate to carry this Plan into effect. Notwithstanding any provision of law, or any explicit ruling or implicit provision of this
document, any action taken, or finding, interpretation, ruling or decision made by the Committee in the exercise of any of its rights, powers, authority or duties under this Plan shall be final and conclusive as to all parties, including without
limitation all Participants, former Participants and beneficiaries, regardless of whether the Committee or one or more if its members may have an actual or potential conflict of interest with respect to the subject matter of the action, finding,
interpretation, ruling or decision. No final action, finding, interpretation, ruling or decision of the Committee shall be subject to de novo review in any judicial proceeding. No final action, finding, interpretation, ruling or decision of the
Committee may be set aside unless it is held to have been arbitrary and capricious by a final judgment of a court having jurisdiction with respect to the issue. To the extent Plan distributions are payable in a form other than a single lump sum
(e.g., installments), the Committee shall determine the methodology for computing such payments. 
 7.2 Delegation of
Authority. The Committee may delegate any of its powers or responsibilities to one or more members of the Committee or any other person or entity. 
  

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 7.3 Procedures. The Committee may establish procedures to conduct its
operations and to carry out its rights and duties under the Plan. Committee decisions may be made by majority action. The Committee may act by written consent. 

7.4 Compensation and Expenses. The members of the Committee shall serve without compensation for their services, but all
expenses of the Committee and all other expense incurred in administering the Plan shall be paid by the Company 
 7.5
Indemnification. The Company shall indemnify the members of the Committee and/or any of their delegates against the reasonable expenses, including attorney’s fees, actually and appropriately incurred by them in connection with the
defense of any action, suit or proceeding, of in connection with any appeal thereto, to which they or any of them may be a party by reason of any action taken or failure to act under or in connection with the Plan and against all amounts paid by
them in settlement thereof (provided such settlement is approved by independent legal counsel selected by the Company) and against all amounts paid by them in satisfaction of a judgment in any such action, suit or proceeding, except in relation to
matters as to which it shall be adjudged in a suit of final adjudication that such Committee member is liable for fraud, deliberate dishonesty of willful misconduct in the performance of his duties; provided that within 60 days after the institution
of any such action, suit or proceeding a Committee member has offered in writing to allow the Company, at its own expense, to handle and defend any such action, suit or proceeding. 

ARTICLE VIII 

Amendment and Termination 

The Company retains the power to amend the Plan or to terminate the Plan at any time by action of the Board. No such amendment or termination shall
adversely affect any Participant or Beneficiary with respect to his right to receive a benefit in accordance with Article VI, determined as of the later of the date that the Plan amendment or termination is adopted or the date such Plan amendment or
termination is effective, unless the affected Participant or Beneficiary consents to such amendment or termination. 
 ARTICLE
IX 
 Miscellaneous 

9.1 Plan Does Not Affect the Rights of Employee. Nothing contained in this Plan shall be deemed to give any Participant the
right to be retained in the employment of the Company, to interfere with the rights of the Company to discharge any Participant at any time or to interfere with a Participant’s right to terminate his employment at any time. 

 

 14 

 9.2 Nonalienation and Nonassignment. Except for debts owed the Company by a
Participant or Beneficiary, no amounts payable or to become payable under the Plan to a Participant or Beneficiary shall be subject in any manner to anticipation, alienation, sale, transfer, assignment, pledge, encumbrance or charge, whether
voluntary, involuntary, by operation of law or otherwise, and any attempt to so anticipate, alienate, sell, transfer, assign, pledge, encumber or charge the same by a Participant or Beneficiary prior to distribution as herein provided shall be null
and void. 
 9.3 Tax Withholding. The Company shall have the right to deduct from any payments to a Participant or
Beneficiary under the Plan any taxes required by law to be withheld with respect to such payments. In addition, the Company shall have the right to deduct from any Participant’s base salary or other compensation any applicable employment taxes
or other required withholdings with respect to a Participant. 
 9.4 FICA Withholding/Employee Deferrals/Company Contributions.
For each payroll period, the Company shall withhold from that portion of the Participant’s Compensation that is not being deferred under this Plan, the Participant’s share of FICA and other applicable taxes that are required to be
withheld with respect to (i) Employee Deferrals, and (ii) Company Contributions as they vest and become subject to such FICA withholding. To the extent that there are insufficient funds to satisfy all applicable tax withholding
requirements in a timely manner, the Company reserves the right to reduce the Participant’s Employee Deferrals, as required to provide available funds for applicable tax withholding requirements. To the extent there are still insufficient funds
to satisfy all such applicable tax withholding requirements, the Participant agrees to timely remit cash funds to the Company sufficient to cover such withholding requirements. 

9.5 Setoffs. As a condition to the receipt of any benefits hereunder, the Committee, in its sole discretion, may require a
Participant or Beneficiary to first execute a written authorization, in the form established by the Committee, authorizing the Company to offset from the benefits otherwise due hereunder any and all amounts, debts or other obligations, incurred in
the ordinary course of the service relationship, owed to the Company by the Participant. Where such written authorization has been so executed by a Participant, benefits hereunder shall be reduced accordingly. The Committee shall have full
discretion to determine the application of such offset and the manner in which such offset will reduce benefits under the Plan; provided, however, that the amount offset in any one taxable year does not exceed $5,000 and the offset is taken at the
same time and in the same amount as the debt otherwise would have been due from the Participant. 
 9.6 Number and
Gender. Wherever appropriate herein, words used in the singular shall be considered to include the plural and words used in the plural shall be considered to include the singular. The masculine gender, where appearing in the Plan, shall be
deemed to include the feminine gender. 
 9.7 Headings. The headings of Articles and Sections herein are included
solely for convenience, and if there is any conflict between such headings and the text of the Plan, the text shall control. 

9.8 Applicable Law. Except to the extent preempted by federal law, the terms and provisions of the Plan shall be construed
in accordance with the laws of the State of Delaware. 
  

 15 

 9.9 Successors. All obligations under the Plan shall be binding upon the
Company and any successors and assigns, in accordance with its terms, whether the existence of such successor is the result of a direct or indirect purchase, merger, consolidation or other transaction, involving all or substantially all of the
business and/or assets of the Company. 
 9.10 Claims Procedure. The Committee shall have sole discretionary
authority with regard to the adjudication of any claims made under the Plan. All claims for benefits under the Plan shall be submitted in writing, shall be signed by the claimant and shall be considered filed on the date the claim is received by the
Committee. In the event a claim is denied, in whole or in part, the claims procedures set forth below shall be applicable. 
 Upon the filing of
a claim as above provided and in the event the claim is denied, in whole or in part, the Committee shall within ninety (90 days, forty five (45) days for disability related claims,) provide the claimant with a written statement which shall be
delivered or mailed to the claimant to his last known address, which statement shall contain the following: 
  

	(a)	the specific reason or reasons for the denial of benefits; 

  

	(b)	a specific reference to the pertinent provisions of the Plan upon which the denial is based; 

 

	(c)	a description of any additional material or information necessary for the claimant to perfect his claim for benefits and an explanation of why such material and
information is necessary; and 

  

	(d)	an explanation of the review procedure provided below. 

If special circumstances require additional time for processing the claim, the Committee shall advise the claimant prior to the end of the initial ninety
(90) day or forty-five (45) day period, setting forth the reasons for the delay and the approximate date the Committee expects to render its decision. Any such extension shall not exceed ninety (90) days, or thirty (30) days for
disability related claims. 
 Within ninety (90) days after receipt of the written notice of denial of a claim as provided above, a
claimant or his authorized representative may request a review of the denial upon written application to the Committee, may review pertinent documents and may submit issues and comments in writing to the Committee. Within sixty (60) days (or
forty-five days in the case of a disability related claim) after receipt of a written request for review, or within one hundred and twenty (120) days (or ninety days for disability related claims) in the event of special circumstances which
require an extension of time for processing such application for review, the Committee shall notify the claimant of its decision by delivery or by Certified or Registered Mail to his last known address. The

  

 16 

 
decision of the Committee shall be in writing and shall include the specific reasons for the decision and specific references to the pertinent provisions of the Plan on which such decision is
based. The Committee shall advise the claimant prior to the end of the initial sixty (60) day or forty-five day period, as applicable, if additional time is needed to process such application for review. The decision of the Committee shall be
final and conclusive. 
 9.11 Claims/Disputes. Any dispute or claim arising out of this Plan or the breach
thereof, which is not settled under the Plan’s administrative claims procedure and which is pursued beyond such claims procedure, shall be brought in Federal District Court, in Harris County, Texas. 

9.12 Conduct Injurious to the Company. Notwithstanding anything in the Plan to the contrary, any and all benefits otherwise
payable to any Participant hereunder, except to the extent of any prior distributions under the Plan, shall be forever forfeited if it is determined by the Committee, in its sole discretion, that such Participant has engaged in conduct injurious to
the Company, including but not limited to the following: 
  

	(a)	dishonesty while in the employ of the Company; 

  

	(b)	imparting, disclosing or appropriating proprietary information for himself or to or for any other person, firm, corporation, association or entity for any reason or
purpose whatsoever, except if required by law or at the Company’s direction; 

  

	(c)	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

  

	(d)	providing goods or services to or becoming an employee, owner, officer, agent, consultant, advisor or director of any firm or person in any geographic area which
competes with the Company in any phase of any of the business lines or services offered by the Company as of the Participant’s Retirement Date. 

9.13 Compliance with Code Section 409A. The Plan is intended to meet the requirements of Section 409A of the Code
in order to avoid any adverse tax consequences resulting from any failure to comply with Section 409A of the Code and, as a result, the Plan shall be operated in a manner consistent with such compliance. Except to the extent expressly set
forth in the Plan, the Participant (and/or the Participant’s Beneficiary, as applicable) shall have no right to dictate the taxable year in which any payment hereunder that is subject to Section 409A of the Code should be paid. 

9.14 No Guarantee of Tax Consequences. None of the Board of Directors, officers or employees of the Company, the Company or
any Affiliate makes any commitment or guarantee that any federal, state or local tax treatment will apply or be available to any individual or person participating hereunder or eligible to participate hereunder. 

 

 17 

 9.15 Entire Agreement. This Plan document constitutes the entire Plan
governing the Company and the Participant with respect to the subject matters hereof and supercedes all prior written and oral and all contemporaneous written and oral agreements and understandings, with respect to the subject matters herein. This
Plan may not be changed orally, but only by an amendment in writing signed by the Company, subject to the provisions in this Plan regarding amendments thereto. 

IN WITNESS WHEREOF, McDermott International, Inc. has caused this Plan to be executed by its duly authorized officer, effective as
provided herein. 
  

			
		 	The Babcock & Wilcox Company
		
	 By:
	 	  

		
	 Title:
	 	  

		
	 Date:
	 	  

 

 18Amendment to the Employee Matters Agreement

 Exhibit 10.15 

AMENDMENT TO EMPLOYEE MATTERS AGREEMENT 

THIS AMENDMENT TO EMPLOYEE MATTERS AGREEMENT dated as of August 3, 2010 (this “Amendment”) is among McDermott
International, Inc., a Panamanian corporation (“MII”), McDermott Investments, LLC, a Delaware limited liability company (“MI”), The Babcock & Wilcox Company, a Delaware corporation (“B&W”), and
Babcock & Wilcox Investment Company, a Delaware corporation (“BWICO” and, together with MII, MI and B&W, the “Parties”). 

PRELIMINARY STATEMENT 

WHEREAS, the Parties are parties to an Employee Matters Agreement dated as of July 2, 2010 (the “Employee Matters
Agreement”; capitalized terms used but not defined in this Amendment shall have the respective meanings given such terms in the Employee Matters Agreement); and 

WHEREAS, the Employee Matters Agreement contains provisions relating to adjustments to equity-based awards held by B&W Employees,
McDermott Employees and other grantees, which adjustments are generally designed to preserve the pre-Distribution values of those awards, such that the intrinsic values of those awards generally would be the same immediately after the Distribution
as they were immediately prior to the Distribution; 
 WHEREAS, the defined terms “Post-Distribution B&W Share
Price” and “Post-Distribution MII Share Price” were intended to be determined on a basis that, taken together (and after taking into account the Distribution Multiple, as defined in the Master Separation Agreement), they would equal
the Pre-Distribution MII Share Price; 
 WHEREAS, the Parties desire to amend the Employee Matters Agreement as provided herein,
to specify the amounts of the Post-Distribution B&W Share Price and Post-Distribution MII Share Price and to clarify how those amounts have been determined; 

NOW, THEREFORE, in consideration of the premises and the mutual agreements this Amendment contains and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, MII, MI, B&W and BWICO hereby agree as follows: 

Section 1. Amendments. The Employee Matters Agreement is hereby amended as follows: 

(a) Section 1.1(rrr) of the Employee Matters Agreement is hereby amended to read in its entirety as follows:

 (rrr) “Post-Distribution B&W Share Price” means $22.75, which is the amount equal to the
“when issued” closing price on the NYSE of a share of B&W Common Stock on the Distribution Date, as reported on the NYSE’s Consolidated Transactions Reporting System. 

 

 1 

 (b) Section 1.1(ttt) of the Employee Matters Agreement is hereby
amended to read in its entirety as follows: 
 (ttt) “Post-Distribution MII Share
Price” means $12.13, which is the amount equal to (i) the Pre-Distribution MII Share Price minus (ii) the amount equal to (x) the Post-Distribution B&W Share Price multiplied by
(y)  1/2 (the Distribution Multiple, as defined
in the Master Separation Agreement), rounded up to the nearest whole cent. 
 Section 2. Effect on Agreement. When
this Amendment becomes effective pursuant to the provisions of Section 3 hereof, (i) all references to “this Agreement” in the Employee Matters Agreement shall be deemed to refer to the Employee Matters Agreement as amended by
this Amendment, and (ii) all references to the “Employee Matters Agreement” in the Master Separation Agreement or any of the Ancillary Agreements shall be deemed to refer to the Employee Matters Agreement as amended by this Amendment,
in each case unless the context otherwise requires. Except as amended hereby, all provisions of the Employee Matters Agreement are and will remain in full force and effect. 

Section 3. Execution in Counterparts; Effectiveness. This Amendment may be executed in two or more counterparts, each of which
will be deemed an original but all of which together shall be considered one and the same amendment and shall become effective when counterparts have been signed by each of the Parties and delivered to the other Parties, it being understood that
each of the Parties need not sign the same counterpart. 
 Section 4. Governing Law. To the extent not preempted by
applicable federal law, this Amendment shall be governed by, and construed and enforced in accordance with, the substantive laws of the State of Texas, without regard to any conflicts of law provisions thereof that would result in the application of
the laws of any other jurisdiction. 
 [Signatures on Following Pages] 

 

 2 

 IN WITNESS WHEREOF, the parties hereto have executed this Amendment as of the date first
above written. 
  

					
	MCDERMOTT INTERNATIONAL, INC.
		
	 By:
	 	 /s/ Liane K. Hinrichs

		 	 Name:
	 	Liane K. Hinrichs
		 	 Title:
	 	Senior Vice President,
		 		 	General Counsel and
		 		 	Corporate Secretary
	
	 MCDERMOTT INVESTMENTS, LLC

		
	 By:
	 	 /s/ Liane K. Hinrichs

		 	 Name:
	 	Liane K. Hinrichs
		 	 Title:
	 	Senior Vice President,
		 		 	General Counsel and
		 		 	Corporate Secretary
	
	 THE BABCOCK & WILCOX COMPANY

		
	 By:
	 	 /s/ Michael S. Taff

		 	 Name:
	 	Michael S. Taff
		 	 Title:
	 	Senior Vice President and
		 		 	Chief Financial Officer
	
	BABCOCK & WILCOX INVESTMENT COMPANY
		
	 By:
	 	 /s/ Michael S. Taff

		 	 Name:
	 	Michael S. Taff
		 	 Title:
	 	Senior Vice President and
		 		 	Chief Financial Officer

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