Erwin Macz

Senior Geologist Engineer with 20+ years of comprehensive experience in mining operations, exploration, and technical management. Expertise includes operational leadership, geological modeling, drilling target generation, QA/QC management, and geotechnical analysis. Proven track record in multidisciplinary project management, environmental impact assessment, and maintaining zero-accident safety environments across diverse international projects in gold, silver, polymetallic, and non-metallic environments.

Consultant - Self-Employed - Guatemala and Honduras

(2019-02)

• Provide consulting services for mining projects, exploration initiatives, environmental impact studies, and landslide risk assessments.

Principal Consultant - Hemco Nicaragua - Nicaragua

(2018-02 - 2019-02)

• Led exploration projects (Brownfields/Greenfields) for gold and silver.
• Discovered Skarn project LA LUNA ROJA (Property of Royal Rods Minerals).
• Managed geochemical analysis, surface mapping, trenching, diamond drilling plans, and QA/QC controls.

Engineering Management - Buck Oilfields Services de México & Honduras - Mexico and Honduras

(2016-02 - 2017-12)

• Directed operational planning for gold, silver, iron, and non-metallic mining projects.
• Managed budgets for exploration, operation, maintenance, and HSE.
• Executed social and environmental impact projects.

Operational Manager - American Pacific – El Mochito Mine (Nyrstar) - Honduras

(2015-02 - 2015-12)

• Responsible for production control and operational efficiency improvements.
• Optimized resources resulting in increased mineral recovery percentage at the concentrator plant.
• Coordinated production blasting, mineral quality control, and transport logistics.
• Managed geological reserves, QA/QC, and diamond drill planning.

Senior Mine Geologist - American Pacific – El Mochito Mine (Nyrstar) - Honduras

(2013-07 - 2015-02)

• Managed sample analysis and laboratory results with strict QA/QC integrity.
• Controlled production grade and coordinated mine operational directions.
• Performed underground mapping (face/back), analysis, interpretation, and ore body modeling in Gems.

Mine Geologist - American Pacific – El Mochito Mine (Breakwater) - Honduras

(2010-02 - 2013-07)

• Managed QA/QC for production zones and drill projects (exploration/definition).
• Performed structural analysis, drill target generation, and weekly/monthly forecasting.
• Modelled ore bodies and analyzed cross-sections/longitudinal plans using Gemcom/Gems.

Consultant Geologist - CONASA - Honduras

(2009-06 - 2009-12)

• Managed geotechnical analysis for highway projects and slope stabilization.
• Conducted geological/geotechnical mapping and risk assessment for landslides.

Chief Explorations Geologist - La Negra Mines (Aurcana Corporations) - Honduras

(2008-01 - 2008-12)

• Updated and validated historical data for La Negra I & II deposits.
• Managed systematic sampling, geological sections, and drilling plans.
• Supervised mining operations startup for La Negra I & II bodies.

Consultant Geologist - Geopetrol - Honduras

(2007-08 - 2007-12)

• Provided structural-geological analysis for hydroelectric projects.
• Managed regional mapping, tunnel locations, and geotechnical studies for dams.

Explorations Geologist - Mayaniquel (BHP Billiton) - Honduras

(2007-01 - 2007-07)

• Led field teams in exploration projects, supervising diamond drilling and heavy machinery.
• Managed core logging, sampling, and cartography.

Geology Mines - American Pacific – El Mochito Mine (Breakwater) - Honduras

(2005-11 - 2006-12)

• Monitored mining activities, production fronts, and underground development.
• Planned drilling programs and analyzed sections in Gems.

Explorations Geologist - Montana Exploradora (Proyecto Marlin) - Guatemala

(2003-07 - 2005-04)

• Conducted geological exploration for gold and silver.
• Managed diamond drill/RC drilling plans, core logging, and regional/detail geological mapping.

Geology Junior - Geopetrol - Honduras

(2003-03 - 2003-05)

• Managed antimony exploration projects, drill planning, and core logging.

Master of Geotechnical Engineering & Geomechanical Applied to Mining - Geotechnical Engineering - University of Huancavelica

Post-Grade - Advanced Structural Geology - University of Huancavelica

Post-Grade - Environmental Impact Assessment & Project Management (PMBOK) - Universidad de San Carlos de Guatemala (USAC)

B.Sc.

• Geologist Engineer - Universidad de San Carlos de Guatemala (USAC)