2019 Annual Meeting of Stockholders

Focused and Engaged Board Our Board continuously evaluates its composition to ensure effective oversight of McDermott's strategy in driving long-term stockholder value Independent Perspective ○ 10 Independent Directors 1 Non-Independent Director 2 Balanced Board Tenure 1 Relevant Skills and Experience P 11 Executive Leadership 8 or more years 1 to 4 11 Energy/Oilfield Services 3 years LO 5 to 7 years 5 Less than 1 year 10 International Operations 7 Financial Oversight Responsibilities 8 9 Other Public Company 88 Board Experience 6 Experience with Core Customers 10 Corporate Governance Commitment to Board Refreshment Annual review of committee composition and individual director skills and qualifications Periodic third party evaluation of Board and Committee effectiveness, last conducted early 2017 Mandatory retirement at age 72 Committee Chair rotation after five years of service M Investor Presentation: 2019 Annual Meeting of Stockholders 7

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