Board of Directors

Marcel Cobuz has served as Chairman of the board of directors since 2025. Mr. Cobuz has served as an executive director on the board of directors of Titan Cement International SA since January 2023 and as Chairman of the Group Executive Committee of Titan Cement International SA since October 2022. Mr. Cobuz previously served as Chairman Designate and member of Titan Cement International SA’s Group Executive Committee from July 2022 to September 2022. From 2018 through 2022, Mr. Cobuz served as a member of the Group Executive Committee of Holcim, a global building materials company based in Switzerland, and served as Holcim’s Head of Europe Region and Group Innovation. Mr. Cobuz holds an undergraduate degree in law from the University of Bucharest, studied economics in Bucharest and graduated from the Advanced Management Program at Harvard Business School.

Mr. Antholis has served as Chief Executive Officer and a member of the board of directors of the Miller Center since 2015, a nonpartisan affiliate of the University of Virginia that explores how the American presidency addresses public policy challenges and engages scholars, practitioners and the public to solve problems. Mr. Antholis has also served as an independent director on the board of directors of Titan Cement International SA since 2018 and as a member of the board of directors of the Miller Center Foundation, a 501(c)3 non-profit, since 2015. Mr. Antholis also served as a trustee of the American College of Greece from 2015 to 2024. Previously, Mr. Antholis was Managing Director of the Brookings Institution from 2004 through 2014. He has also served in various national security positions at the U.S. State Department and the White House. Mr. Antholis holds a PhD in politics from Yale University and a bachelor degree in government and foreign affairs from the University of Virginia.

Mr. Bachmann has served as President of the U.S. Interior Products Group of CertainTeed Corporation, a North American manufacturer of building materials and subsidiary of French multi-national manufacturer of building materials Compagnie de Saint-Gobain S.A., since 2022 and as General Manager of CertainTeed US Gypsum from 2020 to 2022. Mr. Bachmann served as Chief Executive Officer and Board Member of Continental Building Products, Inc., a publicly traded gypsum manufacturing company, from 2014 until its acquisition by Compagnie de Saint-Gobain S.A. in 2020. Mr. Bachmann also served as a Board Member of Go Labs, Inc. from July 2024 to October 2024. Mr. Bachmann received a bachelor of science in business administration from Georgetown University.

Mr. Colakides has served since 2014 as Chief Financial Officer and executive member of the board of directors of Titan Cement Company S.A. and Titan Cement International SA since 2014 and as Managing Director of Titan Cement International SA since 2019. Mr. Colakides served as Deputy Chief Executive Officer—Group Risk Executive Officer of EFG Eurobank Ergasias S.A. from 2007 to 2013. Prior to joining EFG Eurobank Ergasias S.A., Mr. Colakides served as Vice-Chair and Managing Director of Piraeus Bank S.A. from 2000 to 2007. Before joining EFG Eurobank Ergasias S.A., Mr. Colakides served as Group Chief Financial Officer and executive member of the board of directors of Titan Cement Company S.A. from 1994 to 2000. Mr. Colakides started his career in banking and held various senior leadership positions in corporate banking for Citibank Greece from 1979 to 1993. Since November 2021, Mr. Colakides has held the position of non-executive chairman of Alpha Bank Cyprus. Mr. Colakides holds a bachelor of science in economics from the London School of Economics and master of business administration from the London Business School.

Ms. Santos has served as a director on the board of directors of Titan Cement International SA since May 2024, and has served on its Strategic Committee since July 2024. Ms. Santos served as Chief Executive Officer of BA Glass B.V., a multinational glass packaging producer, from 2014 to 2024 and as its Chief Financial Officer from 2007 to 2014. Since March 2024, she has served as a director of BA Glass B.V. Ms. Santos has also served as a director of EDP, S.A., a public renewable energy company based in Portugal, and a member of its USA Affairs Committee since 2024. From 2019 to present, Ms. Santos has also served as a member of the board of directors of the Navigator Company, a public paper and pulp company based in Portugal. Ms. Santos was previously a member of the board of directors of Banco Português de Investimento S.A. from 2023 to 2024, where she served on the Audit Committee and chaired the Nominations and Remuneration Committee. Ms. Santos holds a master of business administration from Porto Business School and an undergraduate degree in business studies from Porto University.

Mr. Van der Smissen has served as a part-time Chief Financial Officer at the CFO Centre, which offers CFO services to a wide-range of small and medium enterprises, since 2020. Prior to the CFO Centre, Mr. Van der Smissen was Vice President Finance & IT Europe at Bemis Europe Holdings, S.A. (later Amcor plc), a global packaging solutions company listed on the Australian Securities Exchange and the New York Stock Exchange, from 2010 to 2020, as well as Chief Financial Officer at Reynaers Aluminium from 2007 to 2010. Between 1983 and 2006, Mr. Van der Smissen worked at Unilever PLC where he held several finance and IT roles at the Belgian and European level, with his ultimate position being Finance Director for Unilever Belgium. Mr. Van der Smissen has served as a member of the board of directors of his own management company Be Change bv, from February 2008 to present. Mr. Van Smissen also served as a member of the board of directors of Mishalle nv, a family business that makes gear shaper cutters, from January 2021 to June 2024, of the Plastics and Cardboard Federation Belgium from 2012 to 2020 and of Bemis Europe Holdings, S.A. from 2010 to 2020. Mr. Van der Smissen was a member of the Advisory Board of Lipa Logistics from 2018 to 2020. Mr. Van der Smissen holds a master in business administration with a major in information technology from Katholieke Universiteit Leuven and is a Certified Board Director, having completed courses in board effectiveness and director effectiveness at Guberna, the Belgian Director’s Institute.

Mr. Zarkalis has served as the President and Chief Executive Officer of Titan America LLC since he joined the company in 2014. Prior to Titan America SA, Mr. Zarkalis served as Titan Cement Company S.A.’s Chief Financial Officer from 2010 to 2014 and as Executive Director of Business Development and Strategic Planning from 2008 to 2010. Prior to joining Titan Cement Company SA in 2008, Mr. Zarkalis served in a number of global business leadership roles with the Dow Chemical Company. Mr. Zarkalis has served since 2010 as a member of the Executive Committee and board of directors of Titan Cement Company S.A. and Titan Cement International SA. Mr. Zarkalis holds a bachelor of science in chemical engineering from The National Technical University of Athens and a master of science in chemical engineering from Pennsylvania State University.