Bob Buchan is the founder, former CEO and Chairman of Kinross Gold, the 5th largest gold producer in the world. Mr. Buchan has served as a director of numerous public companies, including as the chairman of Polyus Gold, the 4th largest gold producer in the world. Mr. Buchan has been an advocate for the mining industry in Canada and around the world, and has promoted education and innovation, mostly notably through the establishment and funding of the Robert M. Buchan School of Mining at Queen’s University.

Grant Angwin has nearly 40 years’ experience in precious metals. He was, until recently, the President of Asahi Refining NA – the world’s largest gold and silver refiners with 3 manufacturing operations in North America. Prior to the sale of the business in 2015, he worked for Johnson Matthey, both in the UK and USA, where he held various senior management roles. His experience includes being the former Chair of the London Bullion Market Association, past Member of the Shanghai Gold Exchange International Advisory Board and a Board Member of the Silver Institute. He currently sits on the ICE Benchmark Precious Metals Oversight Committee for the LBMA Gold and Silver prices. He studied Chemistry and Business and Finance at the University of Hertfordshire as well as the Executive Management Programme at Queens School of Business, Ontario.

He graduated from the Universidad Autonoma de Nuevo Leon (UANL) where he obtained his Law Degree with Honorary mention. He also earned a Master's Degree in Finance from the University of Wisconsin and enrolled as an Honor Student. Before joining CEMEX, he was Deputy General Director of Regional Banking, responsible for all aspects (Credit, Legal, etc.) related to the Bank’s operation in its 121 local branches from 1985 to 1987.
He joined CEMEX, S.A.B. de C.V., in 1987 and served as General Legal Director until June 2014, when he was promoted to Legal Executive Vice President in 2017. Mr. Villarreal also held the position as a consultant to the Chairman of the Board of Directors and to the CEO of CEMEX, until December 31th, 2017. Furthermore, he served as Secretary of the Board of Directors of CEMEX, from 1995 to 2017. And figured as Secretary of the Board of Directors of CEMEX Mexico until February 2017.
Mr. Villarreal has been a member of the Board of Directors of CEMEX, S.A.B. of C.V. since 2017. He is also a member of the Board of Directors of several Companies, such as Grupo Cementos de Chihuahua, S.A. de C.V., Vinte Viviendas Integrales, S.A.B. of C.V., Banco Bancrea, S.A. Institución de Banca Múltiple y Arendal, S. de R.L. de C.V., until February 2012; Mr. Villarreal held the position of Secretary of the Board of Directors of Enseñanza e Investigación Superior, A.C., a company that manages the Instituto Tecnológico y de Estudios Superiores de Monterrey (ITESM).