Matt Bender, MBA, P.E., QP
Director of Metallurgy
Lakewood, CO

Mr. Bender is a Metallurgical Engineer with over 32 years of experience in the mining and minerals industry with precious metals, base metals, and industrial minerals. (CV en Español)

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Jim Willis, P.E.
Sr. Civil Engineer
Salt Lake City, UT

Mr. Willis is a Sr. Civil Engineer with 14 years of experience in civil design and water resource engineering managing projects from feasibility level through construction. (CV en Español)

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Adrien Butler, P.E.
Sr. Civil Engineer
Lakewood, CO

Ms. Butler is a Project Civil Engineer with 14 years of professional civil engineering experience in the mining industry with an emphasis on tailings storage facilities and associated mining infrastructure. (CV en Español)

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Julio Juarez, CIP
General Manager, Lima
Lima, PerĂº

Mr. Juarez is a geological engineer with 18 years of experience providing geotechnical, geological and geo-environmental services to the international mining industry. (CV en Español)

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Justin Knudsen, P.E., QP
Sr. Geotechnical Engineer
Lakewood, CO

Mr. Knudsen is a Professional Engineer (Civil/Geotechnical B.S. and M.S.) and project manager with 17 years of experience in the mining industry applying his geotechnical expertise. (CV en Español)

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Francisco Barrios, P.E., MBA
Sr. Civil Engineer
Tucson, AZ

Mr. Barrios has 15 years of experience in the civil and environmental engineering fields for the mining industry primarily throughout North America and Latin America. (CV en Español)

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Matt Fuller, LEG, P.Geo., QP
Founding Principal
Lakewood, CO 80401

Engineering Geologist

Mr. Fuller, CPG, LEG, P.Geo., QP is a Founding Principal of Tierra Group International, Ltd. Matt’s professional experience spans 30 years applying geological, geotechnical, geo-environmental and geological hazards, design and consulting services to tailings dam design, construction, and operations management. Matt is Tierra Group's Chief Tailings Steward having worked with more than 50 tailings storage facilities worldwide. (CV en Español)

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Peter E. Kowalewski, P.E., QP
Founding Principal
Salt Lake City, UT 84111

Principal Engineer

Mr. Kowalewski, P.E., QP is a Principal Engineer with 27 years of experience in hydrology and hydraulics as well as geotechnical engineering of mine waste containment facilities such as heap leach facilities (HLF) and tailings dams and the design of water management facilities, such as water storage dams, spillways, and diversion canals. His experience includes permit application development and compliance for various aspects of mine operations and closure. (CV en Español)

Employee Bio

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