FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Munro Scott   2. Issuer Name and Ticker or Trading Symbol MCDERMOTT INTERNATIONAL INC [MDR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP, Chief Corp. Dev. Officer (Last) (First) (Middle) C/O MCDERMOTT INTERNATIONAL, INC., 757 N. ELDRIDGE PARKWAY 3. Date of Earliest Transaction (Month/Day/Year) 05/10/2018 (Street) HOUSTON, TX 77079 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Restricted Stock Units

(1)

05/10/2018

A

19,783

(2)

(2)

Common Stock

19,783

$ 0

19,783

D

Restricted Stock Units

(3)

05/10/2018

A

9,058

(2)

(2)

Common Stock

9,058

$ 0

9,058

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Munro Scott C/O MCDERMOTT INTERNATIONAL, INC. 757 N. ELDRIDGE PARKWAY HOUSTON, TX 77079			SVP, Chief Corp. Dev. Officer

Signatures

/s/ Kimberly J. Wolford, by Power of Attorney		05/14/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The restricted stock units were originally granted to the reporting person as performance units on February 26, 2016. On March 1, 2018, the Compensation Committee approved an amendment to the February 26, 2016 form of Performance Unit Award Agreement to provide that 100% of the initial performance units granted would be converted into time-vested restricted stock units vesting on the third anniversary of the original grant date, effective upon the closing of the Company's combination with Chicago Bridge & Iron Company, N.V., which occured May 10, 2018. Each restricted stock unit represents a contingent right to receive the value of one share of MDR common stock, with such restricted stock units to be paid, in the sole discretion of the Compensation Committee: (i) in shares of MDR stock (ii) cash equal to the fair market value of the shares of MDR common stock otherwise deliverable, or (iii) any combination thereof.
(2)	The restricted stock units will vest 100% on the third anniversary of the original grant date.
(3)	The restricted stock units were originally granted to the reporting person as performance units on February 28, 2017. On March 1, 2018, the Compensation Committee approved an amendment to the February 28, 2017 form of Performance Unit Award Agreement to provide that 100% of the initial performance units granted would be converted into time-vested restricted stock units vesting on the third anniversary of the original grant date, effective upon the closing of the Company's combination with Chicago Bridge & Iron Company, N.V., which occurred May 10, 2018. Each restricted stock unit represents a contingent right to receive the value of one share of MDR common stock, with such restricted stock units to be paid, in the sole discretion of the Compensation Committee: (i) in shares of MDR stock (ii) cash equal to the fair market value of the shares of MDR common stock otherwise deliverable, or (iii) any combination thereof.

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