It is the responsibility of the Board of Directors (the “Board”) of Sierra Metals Inc. (the “Company”) to oversee the management of the business and affairs of the Company. The management of the day-to-day operations of the Company is delegated to the Chief Executive Officer (“CEO”) and the other senior executives of the Company (collectively, “Management”) under the stewardship of the Board. In carrying out its duties, Board members shall: (1) provide Management with sound business guidance, calling upon the varied experiences and expertise of its members; (2) act honestly and in good faith with a view to the best interests of the Company; and (3) exercise the level of care, diligence and skill that a reasonably prudent person would exercise in comparable circumstances.

To view the Board Mandate for Sierra Metals Inc., please click here.


Jose Vizquerra Benavides, Chairman

Jose Vizquerra is President and Chief Executive Officer, and a director of O3 Mining Inc. ("O3 Mining"), a leading consolidator and mineral explorer with a focus on gold assets in Quebec and Ontario. The Young Mining Professionals recognized Mr. Vizquerra as one of their Young Mining Professionals of the year with the 2019 Peter Munk Award.

Prior to his appointment at O3 Mining, Mr. Vizquerra was Executive Vice President of Strategic Development for Osisko Mining Inc. ("Osisko Mining"). Mr. Vizquerra joined Osisko Mining from Oban Mining Corporation ("Oban"), where, as President and Chief Executive Officer, he played a leading role in the combination of Oban, Corona Gold Corporation, Eagle Hill Exploration Corporation, and Ryan Gold Corporation to form the Osisko Mining. Through ambitious drilling and prudent capital raising, Osisko Mining has become the highly valued proponent of the world-class Windfall gold project. Before that, Mr. Vizquerra was Head of Business Development for Compañia de Minas Buenaventura. Previously, he was a production and exploration geologist at the Red Lake gold mine in Ontario.

Mr. Vizquerra currently serves as a director of Osisko Mining, and Sierra Metals Inc., and as an advisor to the boards of Discovery Metals Corporation and Palamina Resources.

Mr. Vizquerra is an alumni of the General Management Program at the Wharton School of Business. He holds an MSc in Mineral Exploration from Queens University and a B.Sc in Civil Engineering from UPC Universidad Peruana de Ciencias Aplicadas. Mr. Vizquerra is a Qualified Person pursuant to National Instrument 43-101.


Douglas Cater, Director

Mr Cater is a professional geologist with more than 30 years of experience in the gold mining and exploration business gained while working with senior tier Canadian-based mining and exploration companies and is currently. He previously served as Vice President – Exploration with Kirkland Lake Gold, a gold producer and explorer located in the Lower Abitibi Greenstone belt in northeastern Ontario. Doug is a Council member of the Association of Professional Geoscientists of Ontario (APGO).


Steven Dean, Director

Mr. Dean is a Fellow of the Australian Institute of Mining and Metallurgy, a Member of the Canadian Institute of Mining, Metallurgy and Petroleum, and a Fellow of the Institute of Chartered Accountants of Australia. He has extensive experience internationally in mining, most recently as President of Teck Cominco Limited (now Teck Resources Ltd.). Prior to joining Teck, Mr. Dean was a founding director of Normandy Poseidon Group, (which became Normandy Mining) the largest Australian gold producer until its sale to Newmont Mining in 2002, as well as founder of PacMin Mining a gold producer that became a subsidiary of Teck Corporation in 1999. He was also a co-founder and former Chairman of copper producer Amerigo Resources Ltd. Mr. Dean is Chairman, CEO and Director of Atlantic Gold (TSX-V:AGB) and Chairman of Oceanic Iron Ore Corporation (TSX-V:FEO),


Luis Marchese, Chief Executive Officer

Mr. Marchese has over 25 years' experience in the mining sector. Having spent the majority of his career with Anglo American, he held progressive positions including that of Country Manager, Senior Advisor to the CEO and General Manager of the Quellaveco and Michiquillay Projects in Peru. Quellaveco is a Copper porphyry project currently under construction.

Mr. Marchese's earlier operating experience includes service with Anglo American's Mantoverde and Mantos Blancos copper mines in Chile as well as Hudbay Mining & Smelting in Canada. Recently, he was a Director to Compañía Minera San Ignacio de Morococha S.A. and an Alternate Director to Compañía Minera Poderosa S.A.

He has served as President of Peru's Society of Mining, Oil and Energy (SNMPE) from 2017 to 2019. He is currently Director of CONFIEP and member of Advisory bodies for different industry and academy organizations.

Mr. Marchese holds a Master of Science degree in Mineral Economics from Pennsylvania State University, and a Bachelor of Science degree in Mining Engineering from Pontificia Universidad Catolica in Peru. He has completed an AMP from GIBS - University of Pretoria, and an ASMP delivered jointly by the University of Cambridge and the University of Queensland.


Dionisio Romero Paoletti, Director

Mr. Romero is the Chairman of the Board of Directors of Credicorp and Banco de Credito – BCP, Peru's largest bank, and has been the Chief Executive Officer of Credicorp (NYSE: BAP) since 2009. Mr. Romero has served as a board member of BCP since 2003 and was appointed Vice Chairman in 2008 and Chairman in 2009. Mr. Romero is also the Chairman of Banco de Crédito de Bolivia, El Pacifico Peruano Suiza Cia. de Seguros y Reaseguros S.A., El Pacifico Vida Cia. de Seguros y Reaseguros S.A., Alicorp S.A.A., Ransa Comercial S.A., Industrias del Espino S.A., Palmas del Espino S.A., Agricola del Chira S.A., among others. Furthermore, Mr. Romero is the Vice Chairman of the Board of Directors of Inversiones Centenario and Director of Banco de Credito e Inversiones – BCI,Cementos Pacasmayo S.A.A. Mr. Romero is a graduate of Brown University with a degree in Economics and earned an MBA from Stanford University.


Koko Yamamoto, Director

Ms. Yamamoto is a chartered professional accountant with over 19 years' experience. She is a partner at McGovern, Hurley LLP, a CPAB registered firm, since 2003, and her practice includes a focus on assurance engagements for reporting issuers in the resource sector. Ms. Yamamoto is involved in initial public offerings and private placements, mergers and acquisitions. She is currently a director for Largo Resources Inc. as well as Chair of the Largo Resources Audit Committee. Ms. Yamamoto is registered as a panel auditor with the Investment Industry Regulatory Organization of Canada (IIROC), which enables her to conduct audits of investment dealers. Ms. Yamamoto obtained her CPA CA designation in 2001 and holds a Bachelor of Commerce from the University of British Columbia.