Senior Mine Geologist

Montana Resources; Butte (MT); On-site; USD 140,000 - 200,000; Full time

Job summary

Montana Resources is seeking a Senior Mine Geologist in Butte, MT to lead geological resource modeling, estimation, and reconciliation efforts for the operation.

You will provide technical leadership in orebody interpretation, grade control integration, and mine planning collaboration with engineering and operations teams. Strong drilling QA/QC, data management, and reporting skills are essential.

Qualifications

• Bachelor's degree in Geology, Geological Engineering, Earth Sciences, or related discipline.
• Master's degree in Geology or Geostatistics preferred.
• 10+ years of progressive experience in mining geology, with significant open pit copper experience.
• Experience in mineral resource estimation and geological modeling.
• Experience with drilling methods and QA/QC of exploration data.
• Experience with resource reconciliation and mine planning integration.
• Proficiency in Leapfrog Geo and MineSight.
• Strong knowledge of geostatistics, block modeling, variography, and resource classification.
• Advanced Microsoft Office and technical reporting skills.

Responsibilities

• Develop, update, and validate 3D geological and resource models.
• Interpret lithological, structural, alteration, and mineralization data from drilling programs.
• Conduct resource estimation and classification using geostatistical techniques and industry best practices.
• Prepare mineral resource updates and support reserve conversion activities.
• Maintain geological databases and ensure QA/QC of data.
• Support annual and life-of-mine resource reporting.
• Provide geological input to mine planning and scheduling processes.
• Collaborate with mine engineers to optimize pit designs and extraction strategies.
• Support drilling programs through targeting, logging standards, and geological interpretation.
• Provide geological interpretation of paragenesis, mineralization, alteration, zoning and structural controls of porphyry copper deposits.

Skills

Geology

Resource estimation

Geostatistics

Open pit mining

Leapfrog Geo

MineSight

QA/QC

Reporting

Collaboration

Education

Bachelor's degree in Geology

Master's degree in Geology or Geostatistics

Tools

Leapfrog Geo

MineSight

Job description

The Senior Mine Geologist is responsible for the development, maintenance, and reconciliation of geological resource models supporting the Montana Resources operation. The position is also responsible for in-pit and near-pit development drilling and interpretation of results. This position provides technical leadership in resource estimation, orebody interpretation, grade control integration, resource classification, and reserve conversion activities. The Geologist collaborates with mine engineering, metallurgy, and operations teams to ensure accurate resource reporting and optimal mine planning along with mine development.

Required Education

• Bachelor's Degree in Geology, Geological Engineering, Earth Sciences, or related discipline.
• Master's Degree in Geology or Geostatistics preferred.

Required Experience

• Minimum 10 years of progressive experience in mining geology, with significant experience in open pit copper operations.
• Demonstrated experience in mineral resource estimation and geological modeling.
• Experience with drilling methods and QA/QC of exploration data.
• Experience with resource reconciliation and mine planning integration.
• Proficiency in Leapfrog Geo and MineSight,
• Strong knowledge of geostatistics, block modeling, variography, and resource classification.
• Advanced Microsoft Office and technical reporting skills.
• Strong understanding of geological modeling and resource estimation methodologies.

Resource Modeling & Estimation

• Develop, update, and validate 3D geological and resource models.
• Interpret lithological, structural, alteration, and mineralization data from drilling programs.
• Conduct resource estimation and classification using geostatistical techniques and industry best practices.
• Prepare mineral resource updates and support reserve conversion activities.
• Maintain geological databases and ensure data quality assurance and quality control (QA/QC).
• Support annual and life-of-mine resource reporting.

Resource Reconciliation

• Perform reconciliation between resource models, grade control models, and production results.
• Identify and evaluate variances affecting mine and mill performance.
• Recommend improvements to estimation methodologies and geological interpretations.
• Monitor model performance and implement continuous improvement initiatives.

Technical Support

• Provide geological input to mine planning and scheduling processes.
• Collaborate with mine engineers to optimize pit designs and extraction strategies.
• Support drilling programs through targeting, logging standards, and geological interpretation.
• Provide geological interpretation of paragenesis, mineralization, alteration, zoning and structural controls of porphyry copper deposits.
• Assist with economic evaluations and technical studies.
• Participate in feasibility, optimization, and expansion projects.

Reporting and Compliance

• Prepare technical reports, resource statements, maps, and presentations.
• Ensure compliance with company resource reporting standards
• Maintain documentation supporting resource estimates and technical assumptions.