On August 15, 2023, the Board of Directors of Great Lakes Dredge & Dock Corporation (Company) appointed Ryan Bayer, 41, as Vice President and Chief Accounting Officer to be effective on August 15, 2023. Mr. Bayer is a Certified Public Accountant in the State of Texas and holds a Bachelor of Business Administration in Accounting and a Master of Professional Accountancy, both from the University of Texas at Austin. From September 2019, until his joining the Company, Mr. Bayer was the Corporate Controller of PERMA-PIPE International Holdings Inc., a global engineered pipe services company.

From October 2018 until August 2019, he was the Director of Corporate Accounting for AFGlobal Corporation, a technology and manufacturing company providing technology, services and fully-integrated manufacturing capabilities to the oil and gas, general industrial, aerospace and power generation industries. From May 2013, until his employment with AFGlobal Corporation, Mr. Bayer served in various capacities, including Senior Manager of Audit and Risk Advisory Services at KPMG and lastly as Manager, Petroleum Services, at Sanchez Oil and Gas Corporation, a private company engaged in the management of oil and natural gas properties. Mr. Bayer replaces Todd M. Lightfoot as Vice President and Chief Accounting Officer.

Mr. Lightfoot will be departing the Company on September 30, 2023.