ROBERTO YZA GUZMAN

Head of the exploration department of the company for the regional exploration of the Avinoi´s mining district. In addition, geologist in charge of the exploration and drilling program of the Ana Maria project.

In charge of category 1 exploration:

• More than 250 prospects evaluated to date in the northern portion of Mexico, mainly in the states of Chihuahua, Durango, Coahuila, Sinaloa, Sonora, and some others in the central portion of the country such as Querétaro, Guanajuato, Zacatecas, Jalisco, Puebla, Aguas Calientes and San Luis Potosí.
• The selected prospects were mapped and sampled to be elevated to the project level, in order to evaluate them by drilling
• Responsible for the design of the drilling programs in addition to being in charge of their management, execution and administration of the assigned budget, as well as the human resources employed
• The last prospect drilled was the La Morita Project in the Mpio. of Ascension Chih. With excellent results, however, it was abandoned by Coeur due to budget issues
• He is currently in charge of the re-evaluation of the La Preciosa Project in the State of Durango.

• In charge of the Exploration Department, including underground exploration within the COZAMIN mine, achieving an increase in reserves by around 4 Mt of ore with a minimum cut-off grade of 3% Cu
• He is also in charge of the regional exploration of prospects in the vicinity of the mine with the aim of finding new deposits.

• In the SIRIO project, Mpio
• Madera, Chih
• In charge of regional exploration and evaluation of its properties
• The existence of a Copper-Gold Porphyry in the Guaynopita area was defined.

• Supervision and development of the projects: In Cópala Sinaloa: La Colorada, Clemens-El Muerto, Cordón Del Oro and Martha; In Durango: Santiago Papasquiaro, Claudia, Promontorio, Lizeth and Montoros.

• Assistant in the design of the mapping and drilling programs of the PALMAREJO Project (now Palmarejo mine), as well as human resources administration in the SUR TROGAN TÉMORIS CHIH project
• Which included the prospects: Guadalupe (now Guadalupe mine), La Patria, Guerra Al Tirano, Todos Los Santos, Santa Aurelia, Santa Úrsula and La Esperanza.

• Performing geological mapping and structural analysis, as well as supervising the geophysical study and geotechnical analysis in the Copper Canyon area, as part of previous studies for the construction of the Divisadero Cable Car, Chih.

• In the PEÑASQUITO Project, Mpio
• De Mazapil, Zacatecas (now Peñasquito mine)
• Second-in-command of the project, responsible for regional 1:10,000 mapping; sampling of rock, soils and stream sediments; supervision of geophysical studies; in charge of supervision of reverse circulation drilling, as well as rab and diamond drilling programs; Assistant in the administration of the project and human resources
• (1995 - 1998)
• Mapping, sampling and geophysics in the NIEVES project, Zacatecas
• (1995) Regional exploration in the area of Concepción Del Oro, Melchor Ocampo, Rocamontes and Caopas
• (1997 - 1998)
• Regional exploration in the states of Durango, Coahuila and Chihuahua
• Soil mapping and rock sampling, supervision of magnetometry studies and design of the reverse circulation program in the Mapimí DGO Project, El Barreal Project, Chih; Vaca Negra Project, Chih.; and Valle De Allende Project, Chih
• (1998 - 1999)
• Development and execution of the regional exploration program for Porphyry Copper deposits in eastern Mexico: States of Nuevo León, Tamaulipas, San Luis Potosí, Querétaro and Hidalgo
• (1999-2000) Cartography and rock sampling for the evaluation of the SAN CARLOS, in the state of Tamaulipas, defined as a Porphyry Copper deposit (1999-2000)
• Regional exploration for Porphyry Copper deposits throughout the state of Sonora
• (2000 - 2002).

• Carrying out the evaluation of mining lots and projects owned by SERVICIOS CORPORATIVOS FRISCO S.A
• DE C.V
• Projects evaluated: San Antonio, Zacatecas, Guaname 1 and 2 as well as Salitrillo, in Edo
• Of San Luis Potosí
• Support geologist at the San Felipe Mine, Baja California Norte, generating new exploration targets with diamond drilling based on geological mapping and structural analysis of the deposit.

• Chihuahua Office, assigned to develop the projects of TEC RESOURCES LTD
• Projects: Paquimé and Adargas in the state of Chihuahua (surface mapping and sampling), (mapping and sampling inside the mine)
• Chalchihuites Project in the state of Zacatecas (mapping and sampling of the surface and interior of the mine)
• Assistance in the contracting and grouping of the district's mining lots.

• Generative Regional Prospecting in the states of Chihuahua, Sonora, Sinaloa, Oaxaca and Michoacán
• Project Geologist at: -The state of Chihuahua: Carrying out rock and soil sampling, as well as the supervision of reverse circulation drilling in the MARFIL project
• Geological mapping, rock and soil sampling in the Corpos, Mariana, Mosqueteros and Santa Lucía projects (now the 5 de Mayo Project)
• Development of diamond drilling in the Amanecer project
• -State of Sonora-: Assistant in the mapping and reverse circulation drilling in the Banco de Oro project as well as in the La Sirrita mining assignment
• -Oaxaca State: geological mapping and rock sampling in the El Sinter project.

• Auxiliar de los geoólogos senior en la exploración regional de la oficina en Chihuahua, Chih.