2019 Annual Meeting of Stockholders

Executive Summary About McDermott Premier, fully-integrated provider of technology, engineering and construction solutions to the energy industry Operating in over 54 countries, McDermott's locally focused and globally-integrated resources include approximately 32,000 employees, a diversified fleet of marine construction vessels and fabrication facilities around the world On May 10, 2018, completed the combination with Chicago Bridge & Iron Company N.V. ("CB&I") through a series of transactions (the "Combination") Engaged Board Committed to Sound Corporate Governance and Oversight of Business Strategy The Board is an invaluable source of perspective and insight, overseeing and engaging in our strategy for continued growth The Combination resulted in the addition of five new, experienced and qualified members to the Board, providing for immediate refreshment and a diverse mix of skills, experience, knowledge and independence for effective decision-making and risk oversight in supporting our long-term strategy Firmly committed to continuing our stockholder outreach program and incorporating feedback, which has resulted in best practice corporate governance and executive compensation policies and programs. Strong Compensation Practices The Compensation Committee seeks to provide reasonable and competitive compensation, with the elements of total direct compensation, or TDC, targeted generally within approximately 15% of median compensation of our market for comparable positions Significant continued emphasis on variable, "at-risk" compensation that aligns pay with performance Rigorous financial performance metrics utilized in compensation program that are directly linked to McDermott's strategy M Investor Presentation: 2019 Annual Meeting of Stockholders 2

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