Tomasz Piwowarczyk

General Manager

Mr. Piwowarczyk holds a Master’s Degree in Finance from WSB University, Wroclaw, Poland, and an Executive MBA from Universidad Adolfo Ibáñez. With more than 10 years of mining experience, he has served as a Global Procurement Engineer at KGHM and Head of Contract Management, Superintendent of Mine Sourcing and Strategic Sourcing Manager at Sierra Gorda SCM.

Beata Choragwicka-Majstrowicz

Vice-President of Human Resources

PhD in Work Psychology with postgraduate degrees in Human Resource Management (HR) and in Labor Relations, with more than 10 years of experience in various areas of Human Resources, both in public and private organizations, small and large companies in different sectors, in various countries including Poland and Spain. For nearly 5 years at KGHM she was the head of HR projects. at the Rudna underground mine in Poland. In 2022 she was recognized as “Executive of the Year” by Women in Mining (WIM) for her outstanding career in the mining industry.

Eric Zepeda

VP of Operations

Civil Engineer in Mining from Universidad de La Serena. Diploma in Mining Planning from Universidad de Chile, and in Human Resources from Universidad Católica de Chile. With a professional career of more than 30 years, he has worked in various mining companies such as Minera Escondida, El Indio of Barrick Gold, and at Sierra Gorda SCM as General Superintendent of Engineering, Mine Manager, and Plant Manager.

Sandra Montiel Chamorro

Supply Chain VP

She has had an outstanding professional career of over 20 years in the industry, serving as a Management Control Engineer, Superintendent of Contracts, and Supply Control Leader in the mining industry. She is an Engineer in Computer Science and Legal Management of Procurement and Contracts from Universidad EAFIT of Colombia, a Specialization in Business Management from Universidad Pontificia Bolivariana of Colombia, and a Diploma in Business Management in Mining from Universidad de Chile. In addition, at BHP she held the position of Superintendent of Category Management and Global Manager of Supply Improvement. Later, in South32 she served as Head of Classification and Supply Operations Manager in Cerro Matoso.

Jan Majkut

Vice President of Finance

A professional with more than 15 years of experience in Financial Management both of local and international regulations. He holds a Master’s Degree in Strategic Management from the Warsaw School of Economics, and an MBA in Management and Business in Mining Industry from Universidad de Chile. He has served as Finance and Supply Chain Manager at Myra Falls Mining Company (Canada) and Finance Manager at Sierra Gorda SCM.

Rocío Amarilla Páez

General Counsel, Sustainability and Corporate Affairs

A Lawyer, Master's Degree in Law and Economics from Université Paris I Sorbonne (France) and MBA from the University of Adelaide (Australia). She has extensive professional experience with more than 15 years dedicated to the mining industry, working in commercial and legal areas in companies in Australia and Chile. She has been part of Sierra Gorda SCM Since 2015 and has been the General Counsel since 2022. In 2023 and 2024 she was included in the Legal500 ranking of outstanding lawyers in Chile.