Featured Employee

Jim Willis, P.E.

Sr. Civil Engineer

Mr. Willis is a Professional Engineer with over 14 years of experience in civil design and water resource engineering. As a Project Engineer he has managed projects ranging from…Read More (Español)

Previously Featured Employees

Julio Juarez, CIP

General Manager, Lima

Mr. Juarez is a geological engineer with more than 15 years of experience providing geotechnical, geological and geo-environmental services to the international mining industry…Read more  (Español)

Justin Knudsen, P.E., Q.P.

Sr. Geotechnical Engineer

Mr. Knudsen is a Professional Engineer (Civil/Geotechnical B.S. and M.S.) and project manager with more than 16 years of experience in the mining industry applying his geotechnical expertise designing…Read more (Español)

Francisco Barrios, P.E., MBA

Sr. Civil Engineer

Mr. Barrios has over 15 years of experience in the civil/environmental engineering field for the mining industry. He is experienced in design, planning, construction, and project…Read more  (Español)

Adrien Butler, P.E.

Sr. Civil Engineer

Ms. Butler is a Project Civil Engineer with 14 years of professional civil engineering experience in the mining industry. Her experience has focused on the design of tailings storage facilities, heap leach pads, and…Read More (Español)

Matthew L. Fuller, C.P.G., L.E.G., P.Geo, QP

Founding Principal

Engineering Geologist

Mr. Fuller, CPG, LEG, P.Geo. is a Founding Principal of Tierra Group International, Ltd. Matt’s professional experience spans more than 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 specializing in…Read More (Español)

Peter E. Kowalewski, P.E., Q.P.

Founding Principal

Principal Engineer

Mr. Kowalewski is a Principal Engineer with over 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. Areas of specialty include…Read more (Español)