Senior Mine Geologist

Washington Corporations; Butte (MT); On-site; USD 140,000 - 190,000; Full time

Job summary

Washington Corporations seeks a Senior Mine Geologist to develop and maintain 3D geological models and support reserve conversion for open pit copper operations. You will lead data interpretation, geostatistical estimation, and QA/QC across the drilling programs and reporting processes.

You will collaborate with mine planning, engineering, and operations to optimize pit designs and ensure accurate resource reporting and schedules.

Qualifications

• Ideal candidate has a Bachelor's in Geology or related field.
• Minimum 10 years in mining geology with open pit copper experience.
• Experience with drilling methods and QA/QC of exploration data.
• Strong proficiency in resource estimation and modelling.

Responsibilities

• Develop, update, and validate 3D geological/resource models.
• Interpret lithological/structural data from drilling.
• Perform resource estimation and classification using geostatistics.
• Support reserve conversion and annual life-of-mine reporting.
• Maintain QA/QC of geological data and databases.
• Provide geological input to mine planning and optimization.

Skills

Geology

Open pit mining

Geostatistics

Leapfrog Geo

MineSight

Resource estimation

QA/QC

Data management

Technical reporting

Microsoft Office

Education

Bachelor's degree in Geology

Master's degree in Geology/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.

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.

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.