Board Committees

Mr. Johnson has served as a Director of Namib Minerals since June 2025. He has over 40 years of experience as a finance and investment executive with a background in senior leadership and board roles across global institutions. His previous positions include Managing Director at Citigroup, Head of Global Corporate Governance at California Public Employees’ Retirement System, and Chief Investment Officer at TIAA. He also served as Chief Strategy Officer at the Public Investment Fund of Saudi Arabia and has held board roles at Texas Industries, EasyKnock, and Glass Lewis & Company. Earlier in his career, Mr. Johnson also served as an officer in the U.S. Army Reserve receiving an honorable discharge.

Mr. Johnson holds a Bachelor in Economics from the Virginia Military Institute and a masters in finance from the Virginia Commonwealth University School of Business. He is a Chartered Financial Analyst (CFA) Charterholder.

Mr. Martins has served as a Director of Namib Minerals since June 2025. He has over 35 years of executive experience in the metals, mining, logistics, and energy sectors. He previously served as Chief Executive Officer of Nexa Resources, where he led the company’s IPO on the New York and Toronto Stock Exchanges. Earlier in his career, he was Executive Vice President for Base Metals at Vale S.A., based in Canada, and Chief Executive Officer of Caemi S.A. Mr. Martins has held board roles at Cia Brasileira de Alumínio, Nexa Peru and Nexa Resources Atacocha S.A.A, and Norsk Hydro, and served as Chairman of the Brazilian Aluminum Association.

Mr. Martins holds a Bachelor of Economics from the Federal University of Minas Gerais and an M.B.A. from the IEAD Federal University of Rio de Janeiro, Brazil. He is a Certified Director with the National Association of Corporate Directors.

Mr. Johnson has served as a Director of Namib Minerals since June 2025. He has over 40 years of experience as a finance and investment executive with a background in senior leadership and board roles across global institutions. His previous positions include Managing Director at Citigroup, Head of Global Corporate Governance at California Public Employees’ Retirement System, and Chief Investment Officer at TIAA. He also served as Chief Strategy Officer at the Public Investment Fund of Saudi Arabia and has held board roles at Texas Industries, EasyKnock, and Glass Lewis & Company. Earlier in his career, Mr. Johnson also served as an officer in the U.S. Army Reserve receiving an honorable discharge.

Mr. Johnson holds a Bachelor in Economics from the Virginia Military Institute and a masters in finance from the Virginia Commonwealth University School of Business. He is a Chartered Financial Analyst (CFA) Charterholder.

Mr. Martins has served as a Director of Namib Minerals since June 2025. He has over 35 years of executive experience in the metals, mining, logistics, and energy sectors. He previously served as Chief Executive Officer of Nexa Resources, where he led the company’s IPO on the New York and Toronto Stock Exchanges. Earlier in his career, he was Executive Vice President for Base Metals at Vale S.A., based in Canada, and Chief Executive Officer of Caemi S.A. Mr. Martins has held board roles at Cia Brasileira de Alumínio, Nexa Peru and Nexa Resources Atacocha S.A.A, and Norsk Hydro, and served as Chairman of the Brazilian Aluminum Association.

Mr. Martins holds a Bachelor of Economics from the Federal University of Minas Gerais and an M.B.A. from the IEAD Federal University of Rio de Janeiro, Brazil. He is a Certified Director with the National Association of Corporate Directors.

Mr. Johnson has served as a Director of Namib Minerals since June 2025. He has over 40 years of experience as a finance and investment executive with a background in senior leadership and board roles across global institutions. His previous positions include Managing Director at Citigroup, Head of Global Corporate Governance at California Public Employees’ Retirement System, and Chief Investment Officer at TIAA. He also served as Chief Strategy Officer at the Public Investment Fund of Saudi Arabia and has held board roles at Texas Industries, EasyKnock, and Glass Lewis & Company. Earlier in his career, Mr. Johnson also served as an officer in the U.S. Army Reserve receiving an honorable discharge.

Mr. Johnson holds a Bachelor in Economics from the Virginia Military Institute and a masters in finance from the Virginia Commonwealth University School of Business. He is a Chartered Financial Analyst (CFA) Charterholder.