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.


Oscar Cabrera, Director

Mr. Cabrera is a Senior equity analyst with over 20 years of experience covering the metals and mining industry for bulge bracket investment banks and Canadian financial institutions, including Goldman Sachs, Merrill Lynch Canada and CIBC World Markets. He obtained recognition for industry thought leadership, fundamental commodity analysis and strong industry relationships, which has led to advisory roles for public mining companies, including Nexa Resources S.A. He also participated in the vetting of and advising on primary and secondary offerings in Canada, the U.S. and Europe. Mr. Cabrera holds a MBA from York University, a M Eng. in Structural Engineering from the University of Toronto and a B. Sc in Civil Engineering from the Instituto Tecnológico y de Estudios Superiores de Monterrey. Mr. Cabrera is a Canadian Citizen, originally from Mexico.


Douglas Cater, Director

Douglas Cater P. Geo, FGC, is a professional geologist with more than 35 years of experience in the gold mining and exploration business gained while working with senior-tier Canadian-based mining and exploration companies. From January 2016 to January 2019, Mr. Cater served as Vice President Exploration (Canada) for Kirkland Lake Gold Ltd., a Toronto based company with operating mines and exploration projects located in northeastern Ontario and Australia. Mr. Cater has worked at numerous world class gold deposits, where he has guided exploration teams for success. In early 2019, D. F Cater Consulting Geologist Ltd, was incorporated, as a Consulting Company which conducts property evaluations, technical reports and project management services to Mining and Mineral exploration companies. Doug is currently a Director of Sierra Metals Inc, Harte Gold Corporation, Mayfair Gold Corporation and a Technical Advisor to Prosper Gold Corporation and Zodiac Gold Corp. Douglas is enrolled in the Directors Education Program offered by the Institute of Corporate Directors.


Carlos Santa Cruz, Director

Mr. Santa Cruz is a Mining Engineer with over 40 years of experience of strong international managerial background in mining operations at a senior level. He held positions with major mining companies, including Senior Vice-President of Australian and New Zealand Operations and Senior Vice-President of South American Operations for Newmont. He currently sits as Chairman of the Board for BISA Ingenieria de Proyectos S.A.. and Director for JRC Ingeniería y Construcción S.A.C. Mr. Santa Cruz is an Independent Mining Consultant and Part-time Professor at Pontificia Universidad Católica and is a member of Industry Advisory Committees at Penn State and Piura University. Chairman of the Board for CIMADE, NGO oriented to promote sustainable mining and infrastructure megaprojects. Mr. Santa Cruz holds a Ph.D., Mining Engineering and M Eng., Industrial Engineering from Penn State University, as well as the Advanced Management Program from Harvard University. Mr. Santa Cruz is a Peruvian Citizen.


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.


Dawn Whittaker, Director

Ms. Whittaker has over 30 years of experience as legal counsel in domestic and international mergers and acquisitions, corporate finance transactions and corporate governance. She is currently Independent Chair of the Board of Directors for Triple Flag Precious Metals Corp. and a member of the Audit Committee. Ms. Whittaker is a former member of the Board of Directors as well as Interim Chair for Detour Gold where she served as Chair of the Corporate Governance and Nominating Committee, as well as a member of the Human Resources and Compensation Committee and the Audit Committee. Ms. Whittaker is a former director of Kirkland Lake Gold where she was the Chair of the Corporate Governance Committee, and a member of the Audit Committee and the Compensation Committee. She was also a member of the Special Committee established in connection with the company’s acquisition of St. Andrew Goldfields in 2015 and Chair of the Special Committee established for the merger with Newmarket Gold in 2016. Ms. Whittaker is currently Vice President of the Board of Directors for the Badminton and Racquet Club of Toronto and a member of both the Governance Review Committee and the Membership and Communications Committee. Ms. Whittaker has served as a member of the Board of Directors for the Canadian Mental Health Association, Ontario Division and was on the Nominating and Governance Committee for the Canadian Cancer Society, Ontario Division. She has also previously served on the Continuous Disclosure Advisory Committee of the Ontario Securities Commission. Ms. Whittaker began her career in corporate law at McCarthy Tetrault LLP and retired in 2018 from Norton Rose Fulbright LLP where she was a Senior Partner and Canadian Leader of the Mining and Commodities Team from 2012 to 2015. She holds a Bachelor of Arts (Honours) and an LL.B. from Queen’s University.