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History Mission and Vision Quality Policy Infrastructure Technology Executive Team

General Manager - Severino Modena

Mr. Modena has worked in the mining engineering field, specializing in open pit mining. He began his career in 1979 at Codelco Chile, Chuquicamata Division, where he held different supervision and management positions in the area of mining operation. In 1984 he began his development in the area of mining engineering, , specializing in short-, medium- and long-term mining planning, having the opportunity to lead work teams and perform management functions.

As of February 1995, he worked as an independent consultant in open pit mining, providing services for Fluor Daniel Chile S.A. and Metálica Consultores S.A.

In 1996, he joined Metálica Consultores S.A. as an associate consultant, and one year later, he became managing partner until August 2011, when the company was acquired by Tetra Tech, Inc. He is currently the mining manager.

He has a double certification as Qualified Person (QP) under i) Registration No. 301987 issued in 2009 by the Australian Institute of Mining and Metallurgy (AusIMM), and ii) Registration No. 0134 issued in 2011 by the Chilean Mining Resource and Reserve Competence Rating Commission.

Engineering Manager - Raúl Contreras

Civil Mining Engineer with 35 years of experience in Open Pit Mining. Competent Person in the area of Mineral Reserves, public registry No. 0128, granted by the Commission for The Qualification of Competencies in Mineral Resources and Reserves of Chile. Mr. Contreras holds a Master`s Degree in Business Administration and Management which complements his business vision.

With 20 years of experience in Mining Operations and 15 years as a specialist consultant in Open Pit, his executive development has been as Engineering Manager, Business Manager, Mine Manager, Superintendent of Operations and Mining Planning, and Head of Mining Projects in the consulting field.

He has experience working in Brazil as the Manager of the Tetra Tech office in Belo Horizonte, between the years 2010 and 2012.

At Tetra Tech Chile, he has been leading mining projects for 15 years both in this country and in Latin America. He currently works as Engineering Manager and Head of Mining Projects.