Senior Production Geologist

Senior Production Geologist provides senior technical leadership and day-to-day geological support to underground mining operations. The role plans and coordinates grade control drilling, underground mapping, sampling, geological interpretation and mine-to-mill reconciliation to support safe, efficient ore extraction and reliable production decisions.

Working closely with Mine Operations, Mine Planning, Technical Services and the Geology team, the position promotes high-quality geological data, effective ore control and continuous improvement.

Responsibilities:

- Demonstrate visible commitment to safe work practices, hazard identification, environmental stewardship and compliance with site procedures.
- Plan, coordinate and execute underground mine geology activities, including mapping, sampling, geological interpretation, grade control and production support.
- Provide technical guidance and mentorship to mine geologists and geological technicians, promoting consistent field practices and data quality.
- Coordinate underground face mapping, channel and face sampling, geological observations and timely validation of geological data.
- Interpret geological structures, lithology, alteration and mineralization controls to improve orebody understanding and production decisions.
- Develop, review and update geological interpretations, sections and 3D models using underground mapping, drilling and sampling results.
- Contribute to the design, prioritization and execution of underground grade control and infill drilling programs in coordination with operations and planning.




- Work closely with underground operations to communicate ore boundaries, grade expectations, geological risks and opportunities affecting extraction.
- Coordinate and analyze mine-to-mill and production reconciliation, investigate variances and recommend improvements to grade control and geological models.
- Ensure geological databases, sampling records and QA/QC processes are accurate, complete and maintained to established standards.
- Provide geological input to short-range mine plans, stope designs, production forecasts, budgets and schedules as required.
- Prepare clear geological reports, production updates, plans and technical presentations for operational and site leadership teams.
- Review and improve geological procedures, data workflows and technical practices to strengthen safety, efficiency and ore control.
- Perform other related geological duties as assigned.

Qualifications:

- Bachelor of Science degree in Geology, Earth Sciences or a related discipline.
- Registered, or eligible for registration, as a Professional Geoscientist with Professional Geoscientists Ontario (PGO).
- Minimum five years of relevant underground mine geology experience,



including substantial exposure to production geology and grade control.
- Experience with underground mapping, sampling, grade control drilling, geological interpretation and production reconciliation.
- Strong understanding of gold mineralization deposit models; experience with Archean Greenstone belt deposits is an asset.
- Proficiency with geological modelling, mine planning and database software; experience with Leapfrog, Vulcan, Deswik and acQuire and reasonable equivalents is an asset.
- Knowledge of geological QA/QC, sampling standards, database validation and ore control practices.
- Ability to provide technical coaching, coordinate priorities and work effectively with underground operations and technical teams.
- Strong analytical, problem-solving, planning and written and verbal communication skills.
- Proficiency in Microsoft Office suite.
- Valid driver’s licence and ability to work safely in underground and surface mining environments.
- Ability to meet the physical requirements of underground fieldwork, including walking uneven terrain and significant grades.

What We Can Offer You

- Base salary range from $140,000 to $160,000 per year, depending on experience and qualifications.
- Comprehensive compensation package including competitive bonuses, advantages, and pension contribution.
- Progressive career path with opportunities for advancement.
- Work in a dynamic, collaborative, and high-performing team.
- Access to experienced mining professionals for knowledge-sharing, mentorship, and skill-building.

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📌 WM Underground Geology (Marathon)
🏢 Hemlo Mining
📍 Marathon