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.


Ed Guimaraes, Chief Financial Officer

Mr. Guimaraes has over 29 years of experience in the Mining business. He joined Sierra Metals as CFO in 2014. Before joining Sierra Metals, Mr. Guimaraes held progressive senior management positions with Aur Resources Inc. (Aur) between 1995 and 2007, ultimately serving as Executive Vice-President, Finance and Chief Financial Officer. In this position, Mr. Guimaraes was a member of the senior management team that executed the acquisition and integration of Aur by Teck Resources Ltd. in a takeover valued at $4.1 billion. Prior to working at Aur, Mr. Guimaraes worked in the Toronto mining group of PricewaterhouseCoopers. Since 2007, Mr. Guimaraes has worked as a consultant in the resource industry and is currently a director of several publicly listed mining companies. He is a Chartered Professional Accountant (CPA, CA) and holds a Bachelor of Arts in Administrative and Commercial Studies from the University of Western Ontario.


Alonso Lujan, Vice President, Exploration

Mr. Lujan is a Geological and Mining Engineer with over 26 years international experience in mineral exploration with a positive track record for increasing companies' resources, output and company value. Mr. Lujan most recently spent 6 years with Mata-Trafigura as the General Manger having been promoted from Exploration and Operations Manager. While there he oversaw the discovery and commissioning of the Magdelana Project with potential for 50 million tonnes within 2 years and helped to double production as well as optimize and reduced costs. Prior to that he worked with Hochschild Mining for 5 years and Minas de Bacis SA de CV for 14 years where he helped to also increase resources, increase output and reduce costs.


Americo Zuzunaga, CP (Geologist by Mining Engineer), Vice President, Corporate Planning

Over 30 years of international experience in mining operations, mine and business planning, engineering studies (PEA, PFS, FS), Project Management and optimizing development. Mr. Zuzunaga was most recently at BISA as a Technical Studies Manager and previously worked at BHP Billiton in successive planning roles. Previously he has been employed with Antamina, Yanacocha and Southern Peru Copper.


James León, Vice President, Operations

Mr. James León is a Mining Engineer with more than 27 years of experience in mechanized mining operations. He has experience related to mining production and planning, mine design and expansion, cost estimation and control and has worked with Sierra Metals since August 2017 as Operations Manager in Mexico, leading the expansion and optimization of two underground mines. Prior to joining the Company, Mr. León worked with Buenaventura, where he held various positions until he was Regional Operations Manager and formed the team that launched two underground gold and silver mining projects of Antapite (2001) and Tambomayo (2017). He holds a Masters Degree in Strategic Business Administration (MBA) from Pontificia Universidad Católica del Perú (PUCP) as well as a degree from the Management Development Program (PDD) of the University of Piura.


Gabriel Pinto, Vice President Sustainability and Corporate Affairs

Mr Pinto is a forestry engineer with more than 20 years of experience in Environmental Management related to operations in the mining and hydrocarbons sector, as well as community relations, health, and safety. His was previouly at Barrick Gold where he held various positions in its operations and was part of the corporate Audit team with activities in South America, Africa, and Oceania. He was also Permits Manager for Peru, and later assumed the position of Corporate Director. After that, he was the Latin American Regional Director for Safety, Health and Environment.


Alberto Calle, Vice President, Human Resources

Mr. Calle’s professional career spans more than three decades in industries such as retail, banking, organizational consulting, and mining. His area of focus for the last 20 years has been in Human Capital, with 13 years dedicated to the large-scale mining industry. Mr. Calle previously held positions at MMG – Las Bambas as Human Resource Manager as well as various roles at Newmont Mining. There, he was Regional Manager of Human Resources when he undertook an international assignment to the Company’s corporate offices in Denver, Colorado, as Director of Human Resources Programs. In this role, he collaborated on global leadership development projects. Mr. Calle holds a degree from the Faculty of Administrative Sciences at the University of Lima as well as an MBA from the University of Piura and has completed courses in Executive Leadership at Daniels School of Business, Denver University and Executive Coaching at Teachers College of Columbia Business School, New York.


Juan Jose Mostajo, Vice President, Legal Affairs

Mr. Mostajo has over 23 years of experience in the mining sector and has been legal advisor to various mining companies, both Peruvian and foreign. His previous positions include being part of the legal management team at Anglo American in Peru as well as Vice President of Legal Affairs of Minera Chinalco, Peru. Prior to that, he was a Director to Minera Los Nevados and Druk Compañía Minera and more recently, a Member of the Board to Compañía Minera Argos.