Chair, Board of Directors

Mr. McKelvy has served on the Board and as our President and Chief Executive Officer since February 2022 and as Chair of the Board since June 2025. Before joining McDermott, he served as President and Chief Executive Officer and on the board of directors of Gilbane Building Company, a major family-owned construction company, from 2016 to January 2022, prior to which he served as Gilbane's President and Chief Operating Officer, from 2014 to 2016.  Prior to that, beginning in 2003, Mr. McKelvy spent twelve years with CH2M in a number of senior roles of increasing responsibility, including President of CH2M's Industrial Division and then its Government, Environmental and Infrastructure Division.  Mr. McKelvy currently serves on the board of directors of Amrize Ltd. (NYSE: AMRZ) and Meeting Street, a children’s learning community. He also previously served on the board of directors of RPS Group plc (FTSE: RPS) from May 2018 through January 2023; Gilbane (2017-2022); CH2M Hill (2017-2014); CWI (Chairman, 2009-2014) and; CH Plateau Remediation Company (Chairman, 2009-2014). Mr. McKelvy is a certified architect and began his career working in that field working for various companies, including Lockwood Greene for 15 years, until it was acquired by CH2M in 2003.