Ownership Submission
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 *
NESSER JOHN T III
   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)
EVP, COO
(Last)
(First)
(Middle)
C/O MCDERMOTT INTERNATIONAL, INC., 777 N. ELDRIDGE PARKWAY		 3. Date of Earliest Transaction (Month/Day/Year)
08/02/2010
(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
Common Stock 08/02/2010   A   69,478 A $ 0 468,728 (1) D  
Common Stock 08/02/2010   M   33,222 A (2) 501,950 D  
Common Stock 08/02/2010   M   9,121 A (2) 511,071 D  
Common Stock 08/02/2010   F   15,433 D $ 12.54 495,638 D  
Common Stock               14,507 (3) I 401 K Plan

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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 (4) (2) 08/02/2010   M     33,222   (5)   (5) Common Stock 33,222 (2) 17,113 D  
Restricted Stock Units (4) (2) 08/02/2010   M     9,121   (6)   (6) Common Stock 9,121 (2) 18,516 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
NESSER JOHN T III
C/O MCDERMOTT INTERNATIONAL, INC.
777 N. ELDRIDGE PARKWAY
HOUSTON, TX 77079		       EVP, COO  

Signatures

 Liane K. Hinrichs, by power of attorney   08/04/2010
**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) Includes 5,885 additional restricted shares granted as a result of adjustments in connection with the July 30, 2010 spin-off of The Babcock & Wilcox Company.
(2) Each Restricted Stock Unit represents a contingent right to receive one share of MDR common stock.
(3) Based upon units held in 401K Plan and the fair market value of Common Stock as of August 2, 2010.
(4) The Restricted Stock Units were substituted for an original grant of performance shares in connection with the July 30, 2010 spin-off of The Babcock & Wilcox Company.
(5) 66% of these outstanding Restricted Stock Units vested on August 2, 2010 in connection with Mr. Nesser attaining retirement eligibility. The remainder of these Restricted Stock Units vest on March 3, 2011.
(6) 33% of these outstanding Restricted Stock Units vested on August 2, 2010 in connection with Mr. Nesser attaining retirement eligibility. 66% of the then outstanding Restricted Stock Units vest on March 5, 2011 and the remainder of these Restricted Stock Units vest on March 5, 2012.

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