Mr. Walker is the former Chief Growth and Development Officer at Rio Tinto where he was responsible for the overall strategic direction and execution of the copper growth portfolio. From 2021-2025 Mr. Walker served as Chief Operating Officer for Rio Tinto’s copper product group, where he led global teams focused on growth and optimization through a world-class copper portfolio. His responsibilities included oversight of major operations and projects across the Americas, including Rio Tinto Kennecott in Utah and Resolution Copper in Arizona. From 2016-2021, he served as Chief Executive Officer and Executive Chairman of Iron Ore Company of Canada. Prior to that, Mr. Walker spent 15 years in various management roles at Rio Tinto. Mr. Walker holds a Master of Business Administration degree from the University of Utah and a Bachelor of Science, Metallurgical Engineering degree from the University of Utah.