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.


Oscar Cabrera, Independent Chair of the Board

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.


Miguel Aramburu, Independent Director

Mr. Miguel Aramburu has over 25 years of professional experience with 15 years dedicated to the mining sector. He currently serves on the Board of Directors of Stracon S.A.C., a mining contractor; Fibra Prime, a Peruvian REIT; Minsur S.A., a Peru-based mining and exploration company; and IEduca, an education conglomerate. He has previously held positions on the boards of Enfoca Investments, Andino Investment Holding, El Comercio, Neptunia, Fenix Power, GyM, Stracon GyM, Maestro Peru, Castrovirreyna and Pacifico Vida. Prior to committing himself to serving on corporate boards, Mr. Aramburu held the position of CEO (2008-2010) and COO (2006-2008) of Hochschild Mining Plc. In addition, he has held progressive positions with Mauricio Hochschild Y Cia, including CEO (2004-2006), CFO (2002-2004) and General Manager for various segments of operations (1995-2002). Mr. Aramburu holds an MBA from Stanford University and obtained his Industrial Engineering degree from Pontificia Universidad Católica del Peru.


Ernesto Balarezo, CEO & Director

Mr. Balarezo has solid management and corporate experience in leading multinational companies in the mining, cement and services industries. Today, he is an Independent Board Member in Compañía Minera Caravelí, Grupo LAR and Compañía Agrícola Chapi, as well as part of the Strategic Committees in Cobra and Spencer Stuart - Perú. He was also a Board member for AENZA (previously Graña y Montero) during its restructuring process.

During 2016 and 2017, Ernesto worked in the Presidency of the Council of Ministers, forming the Delivery Unit, which had the task of monitoring the progress of the 6 priority projects of the Government.

Before that, he held positions such as Executive Vice President for the Americas in Gold Fields Limited, and CEO of Gold Fields La Cima S.A. During this time his highlights were his contributions in the strategic definition and global results of the company and assisting in the formation of a world class team.

Previously, he worked for the Hochschild Group for 16 years. His last position was Vice President of Operations at Hochschild Mining, where he was responsible for five operations in Peru, Argentina and Mexico, as well as the mining projects in development. He also held the positions of General Manager of Hochschild Mining in Mexico and then in Peru, as well as Deputy General Manager and Finance Manager in Cementos Pacasmayo.

In addition, he has been Director of several companies related to the Hochschild Group, Gold Fields Ltd and Director - Founder of the Peruvian - South African Chamber. He has also made contributions as Director of Peru 2021 and in IPAE Acción Empresarial.

He has a master's degree in Industrial Management (MS) and a Bachelor in Industrial Engineering (BS), both degrees obtained at the University Texas A&M in USA. He has followed various courses of specialization in direction, management, finance, and human resources in institutions like Institute of Directors, Harvard, Wharton, INSEAD, IESE, among others.


Douglas Cater, Independent Director

Mr. 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. In early 2019, D. F. Cater Consulting Geologist Ltd. was incorporated as a consulting company that conducts property evaluations, technical reports and project management. Mr. Cater is a Director of Mayfair Gold Corp., Exploits Discovery Corp. and Gowest Gold Ltd. He serves as the Chair of the Compensation committee (Mayfair) and is Chair of Technical Committee (Exploits). Mr. Cater is a graduate of the ICD Rotman Director Education Program.


Robert Neal, Independent Director

Mr. Neal has 33 years experience in senior roles with hedge funds and leading global corporate finance firms. He has extensive experience as both a principal investor and advisor in leveraged finance, high yield, private and public equity. He has long-standing relationships and expertise in the energy, industrial and materials sectors. Mr. Neal founded Skellig Capital LLC in February 2007. Skellig Capital is a global long/short equity hedge fund based in New York. Primary industry concentrations include industrials, energy, mining, metals and logistics. Prior to founding Skellig Capital, Mr. Neal was responsible for industrial sector research with a concentration on ferrous and industrial metals at Passport Capital, LLC. Prior to joining Passport Capital, Mr. Neal had a 14 year corporate finance career with firms including Merrill Lynch, Barclays de Zoete Wedd and Dresdner Kleinwort Wasserstein, where Mr. Neal was the global head of private equity coverage. Mr. Neal’s corporate finance expertise concentrated on leveraged finance, high yield, restructuring and mergers & acquisitions. In his corporate finance work Mr. Neal focused for many years on the private equity community in the United States and Western Europe, providing acquisition and financial structuring advice for numerous transactions, principally in the industrial sector. Mr. Neal received a BA from Duke University in 1988


Carlos Santa Cruz, Independent 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.


Beatriz Orrantia, Independent Director

Ms. Beatriz Orrantia has over 17 years of mining industry experience in both legal and operational capacities. She is an ESG/Sustainability expert and strategic consultant on Canada-LatAm matters, previously VP Special Projects at Barrick Gold. Prior to joining Barrick Gold, Ms. Orrantia was an M&A, securities and mining lawyer at leading law firms in Toronto, including McCarthy Tétrault and Gowlings. Ms. Orrantia holds a law degree (Civil Law, full scholarship for academic excellence) from Universidad del Rosario in Colombia, and a law degree (Common Law) from Osgoode Hall Law School (York University) in Canada. She is pursuing her Master's degree in Sustainability at Harvard University and holds a certificate in Sustainability and Innovation also from Harvard University. Ms. Orrantia is a corporate director certified by the National Association of Corporate Directors, the leading certification in the United States for board members, and serves on the boards of Star Royalties Ltd. and Fission Uranium Corp.


Wendy Kaufman, Independent Director

Ms. Kaufman is a senior financial executive and corporate director with over 25 years of experience leading junior and mid-tier publicly traded companies, largely in the resource sector. She currently serves as Chief Financial Officer of Canada Nickel Company Inc. which is focused on the development and financing of a large-scale nickel deposit in Canada and is a member of the Board of Directors and Audit Committee of BZAM Ltd. and ADAPT. Previous to Canada Nickel, she served as Chief Financial Officer of Pasinex Resources Limited and Primero Mining Corporation and was Vice President, Finance and Treasury at Inmet Mining Corporation.

Ms. Kaufman brings extensive knowledge in the areas of liquidity, capital structuring, financial management and planning and corporate governance geared to support growth strategies. She also has expertise in public company accounting and reporting, corporate strategy, capital markets, acquisitions and integration. Ms. Kaufman is a CPA, CA and holds a Bachelor of Business Administration from Wilfrid Laurier University.