McDermott Awarded Subsea Contract in Brazil

McDermott International, Inc. (NYSE:MDR) (“McDermott”) announced today that one of its subsidiaries has entered into an agreement with Petrobras for the supply of its subsea Lay Vessel North Ocean 105 (“LV105”). This contract is included in McDermott’s first quarter 2014 backlog.

The LV105 will carry out deepwater umbilical and flexible pipe installation in the pre-salt region and Campos Basin area offshore Brazil. Expected to commence during the third quarter of 2014, the term of the charter is approximately 200 days, with an option to extend.

“This new contract award highlights Petrobras’ ongoing confidence in McDermott to deliver leading subsea installation solutions,” said Tony Duncan, Executive Vice President, Subsea. “The charter also supports our vessel utilization targets as during the second half of 2014 McDermott will have three deepwater vessels on charter to Petrobras.”

NOTES TO EDITORS

The Lay Vessel North Ocean 105 is a dynamically positioned, fast-transit vessel, with advanced Reel-Lay systems for rigid and flexible pipelay in water depths up to 10,000 feet. It can install a variety of pipelines, umbilicals, subsea hardware and deepwater moorings for floating facilities.

ABOUT McDERMOTT

McDermott is a leading provider of integrated engineering, procurement, construction and installation (EPCI) services for upstream field developments worldwide. The Company delivers fixed and floating production facilities, pipelines and subsea systems from concept to commissioning for complex Offshore and Subsea oil and gas projects to help oil companies safely produce and transport hydrocarbons. Our clients include national and major energy companies. Operating in more than 20 countries across the world, our locally focused and globally integrated resources include approximately 14,000 employees, a diversified fleet of specialty marine construction vessels, fabrication facilities and engineering offices. We are renowned for our extensive knowledge and experience, technological advancements, performance records, superior safety and commitment to deliver. McDermott has served the energy industry since 1923 and is listed on the New York Stock Exchange.

To learn more, please visit our website at www.mcdermott.com.

FORWARD-LOOKING STATEMENTS

In accordance with the Safe Harbor provisions of the Private Securities Litigation Reform Act of 1995, McDermott International, Inc. cautions that statements in this press release which are forward-looking and provide other than historical information involve risks and uncertainties that may impact McDermott's actual results of operations. The forward-looking statements in this press release include, among other things, the expected scope, execution timing and duration of this project. Although McDermott's management believes that the expectations reflected in those forward-looking statements are reasonable, McDermott can give no assurance that those expectations will prove to have been correct. Those statements are made based on various underlying assumptions and are subject to numerous uncertainties and risks, including without limitation, changes in project design or schedule, contract cancellation, change orders and other modifications, and difficulties executing on the project. If one or more of these risks materialize, or if underlying assumptions prove incorrect, actual results may vary materially from those expected. For a more complete discussion of these and other risk factors, please see McDermott's annual report on Form 10-K for the year ended December 31, 2013. This news release reflects management's view as of the date hereof. Except to the extent required by applicable law, McDermott undertakes no obligation to update or revise any forward-looking statement.

McDermott International, Inc.Investors & Financial MediaSteve Oldham, [e-mail], General & Local MediaLouise Denly, [e-mail] Burnley, [e-mail]