Sierra Metals Inc, formerly Dia Bras Exploration Inc, is a Canada-based mining company. The Company is focused on the production, exploration and development of precious and base metals in Peru and Mexico. The Company owns interest in the polymetallic Yauricocha Mine in Peru and in the Bolivar and Cusi Mines in Mexico. In addition to its producing mines, the Company also owns various exploration projects in Mexico and Peru. The Company operates under the following segments: Peru- Yauricocha Mine and Mexico - Bolivar and Cusi Mines. The Yauricocha Mine is a Silver-Lead-Zinc-Copper-Gold property comprised of more than 17, 000 hectares. The Bolivar Mine is a Copper-Silver-Gold property comprised of approximately 15, 000 hectares. The Cusi Mine is a Silver-Lead-Zinc-Gold property comprised of more than 11, 000 hectares.

Mining

Sierra Metals

Ernesto Balarezo

Noel Menera

Astolfo Romero

Patricia Kosa Muñoz

Chamorro Ruben

Rut Colchao Perez

Alberto de la Garza Moriel

Simon Choccelahua Llacctahuaman

Ricardo Robles Coss

Manoel Felix

Irbin Aguero Luna

Sugey Rodriguez

Maykell Quispialaya Bonilla

Juan Carlos Nicolas Pinto Chauca

Jose Angel Luna Arrizon

Jaime Daniel Villalobos

Edwin Ruben Surichaqui Sapallanay

Adan Herrera Solis

Rajesh Vyas

Carlos Garcia Rosales

José Fernández-Baca

Alberto Calle

Alonso Lujan

Directors and Vice Presidents

Engineering Team

Leadership Team

Analytics and Data Management Team

Human Resources

Operations and Maintenance

General Management

Geology and Metallurgy

Project and Development Team

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Teams at Sierra Metals

Directors and Vice Presidents

Engineering Team

Leadership Team

Analytics and Data Management Team

Human Resources

Operations and Maintenance

General Management

Geology and Metallurgy

Project and Development Team

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Teams at Sierra Metals

Directors and Vice Presidents

Engineering Team

Leadership Team

Analytics and Data Management Team

Human Resources

Operations and Maintenance

General Management

Geology and Metallurgy

Project and Development Team

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