Mr. Hernández was a member of the board of directors of Nexa Brazil until 2018. Mr. Hernández has over 45 years of experience in the mining industry. He is currently the President of the Sociedad Nacional de Minería in Chile and Advisor to the Chairman of BAL Group. He also integrates the Executive Committee of the Confederación de la Producción y del Comercio de Chile. He served as CEO of Antofagasta Minerals from August 2012, and in September 2014 was appointed CEO of Antofagasta plc, a position he held until April 2016. He was CEO of CODELCO in 2010/2012 and President of Base Metals in BHP Billiton and Chairman of Minera Escondida during 2004/2010, based in Santiago. He served as Executive Director, Non Ferrous Metals in Vale in 2001/2004, CEO of Compañía Minera Doña Inés of Collahuasi in 1996/2001 and has held other senior positions in Anglo American and Rio Tinto. Mr. Hernandez received a civil mining engineer degree from the University of Chile and from the École Nationale Supérieure des Mines de Paris. In 2010, he received an award granted by the Copper Club of New York, and in 2013 the Chilean Institute of Engineers awarded him the “Gold Medal” for his distinguished career and important contribution to the development of engineering in Chile.