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.


Alberto Arias, Chairman

Mr. Alberto Arias is the founder and President of Arias Resource Capital Management LP. Mr. Arias has over 26 years of experience in the field of international mining finance, and is widely recognized as an industry expert, having been ranked for five consecutive years as the #1 equity research analyst for the metals and mining industry in Latin America by leading polls such as Institutional Investor. Prior to founding Arias Resource Capital, Mr. Arias worked for eight years at Goldman, Sachs Co., most recently as Managing Director and Head of Equity Research for metals and mining in the U.S., Canada and Latin America. Prior to Goldman Sachs, Mr. Arias worked for 4 years at UBS as Executive Director and Analyst covering the Latin American metals and mining sector. Mr. Arias has engineering degrees in mining and metallurgy and an MBA (B.Sc. from the Colorado School of Mines and three Masters degrees from Columbia University), mining industry operational experience, and holds a patent for a gold mineral processing technology. He was raised in a family with a three-generation tradition of founding and managing private and public mining companies in Peru.


Ricardo Arrarte, Director

Mr. Arrarte is a Director with an affiliate of the private equity firm Arias Resource Capital Management LP and is also the Chief Executive Officer for Cautivo Mining Inc. Mr. Arrarte is a Mining and Mechanical Engineer with over 20 years’ experience in management, operations, and consulting for mining companies. Mr. Arrarte has worked with Hochschild Mining PLC as Operations Manager in charge of four silver mines in Peru, Compania Minera Caudalosa SA as Chief Executive Officer, Consorcio Minero Horizonte as Planning and Engineering Manager, Buenavetura Ingenieros SA – BISA as an Engineering Consultant, Fosfatos Del Pacifico SA as Mine Manager, and Cementos Pacasmayo SAA as Geology and Mine Central Manager. Mr. Arrarte is experienced in mine and plant design, managing mining operations, production and costs with large teams of personnel. Mr. Arrarte earned his Mining and Mechanical Engineering degrees from Pontifica Universidad Catolica Del Peru and his MBA from the George Washington University in Washington, D.C.


Doug 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),


Igor Gonzales, President & CEO and Director

Mr. Gonzales is from Cusco, Peru and has more than 30 years of experience in the mining industry. He was with Barrick Gold Corporation from 1998 to 2013, most recently as Executive Vice President and Chief Operating Officer. Between 1980 and 1996, Mr. Gonzales served in various roles with Southern Peru Copper Corporation. Mr. Gonzales has a Bachelor of Science degree in Chemical Engineering from the University of San Antonio Abad in Cusco, Peru, and was a Fulbright Scholar at the New Mexico Institute of Mining and Technology, where he earned a Master of Science degree in Extractive Metallurgy.


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.


Jose Alberto Vizquerra-Benavides, Director

Mr. Vizquerra is currently Executive Vice President of Strategic Development & Director at Osisko Mining. For over four years, he served as the President & CEO of Oban Mining Corp. (“Oban”), where he led the successful change of business strategy that resulted in Oban’s acquisition of Corona Gold, Eagle Hill Exploration Corp. and Ryan Gold to form what is now Osisko Mining. Mr. Vizquerra previously worked as Head of Business Development for Compania de Minas Buenaventura, prior to which he worked as production and exploration geologist at the Red Lake gold mine. He is currently a board member of Alio Gold Inc, Sierra Metals and Discovery Metals. Mr. Vizquerra holds a M.Sc. from Queens University in MINEX, and is a Qualified Person (AIGP). Mr Vizquerra is currently advancing the General Management Program (GMP) at the Wharton School of Business.


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.