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About the Role
Mariana Minerals is seeking a Senior Mine Planner to lead strategic mine planning, opportunity evaluation, and long-range optimization for its mining projects. This role defines how mines are evaluated, designed, sequenced, and optimized, influencing capital allocation and development strategy.
Responsibilities
- Lead technical mine planning input for project screening, opportunity evaluation, and portfolio-level decision making.
- Develop high-level mine concepts, production profiles, and sequencing options to support investment, acquisition, and development decisions.
- Partner with geology, metallurgy, and commercial teams to evaluate trade-offs between scale, timing, risk, and value.
- Own and develop long-range (LOM) mine plans that maximize NPV, operational flexibility, and strategic optionality.
- Perform multi-pit optimization, phase sequencing, and cutback strategy development across complex deposits.
- Evaluate alternative development strategies, mining rates, and sequencing scenarios to support robust decision making.
- Define and maintain company-wide standards, methodologies, and assumptions for short-, medium-, and long-term mine planning.
- Establish consistent approaches to mine design, scheduling, economic evaluation, and scenario analysis across all projects.
- Review and challenge mine plans produced by internal teams and external consultants to ensure technical rigor and alignment with company standards.
- Work closely with geology, geotechnical, processing, infrastructure, and operations teams to ensure mine plans are fully integrated and technically sound.
- Translate long-range strategic plans into clear planning frameworks that downstream engineering and operations teams can execute against.
- Serve as the technical authority for mine planning decisions across the organization.
- Mentor and guide mine planners and engineers across the company, raising the overall quality and consistency of planning work.
- Contribute to the development of internal tools, templates, and workflows that improve planning efficiency and decision quality.
- Stay current on industry best practices, software, and optimization techniques, bringing new ideas into the organization.
Requirements
- 5+ years of mine planning experience, with a strong emphasis on long-range planning, optimization, and strategic evaluation.
- Demonstrated expertise in pit optimization, phase design, sequencing, and economic trade-off analysis.
- Experience evaluating complex, multi-pit or multi-deposit mining projects.
- Ability to think at both the technical and strategic level, connecting mine plans to capital decisions and long-term value creation.
- Strong communication skills and confidence operating as a senior technical authority.
- Experience working in fast-moving, project-driven or greenfield environments.
- Experience supporting early-stage studies (conceptual, PEA, PFS, FS) and corporate-level project evaluations.
Skills
- Mine planning
- Opportunity evaluation
- Long-range optimization
- Multi-pit optimization
- Phase sequencing
- Cutback strategy development
- Economic trade-off analysis
- Mine design
- Scheduling
- Scenario analysis
- Technical authority
- Deswik
- Whittle
- Vulcan
- MinePlan
- Leapfrog
Experience Level
- Senior
Education Level
- Bachelor’s degree in Mining Engineering or a closely related field (Master’s preferred)
- Professional Engineer (P.Eng or equivalent), or eligibility
About the Company
- Mariana Minerals is a software-first, vertically integrated minerals company.
- The company's mission is to supply critical minerals powering modern energy, AI, and defense technologies.
- They are reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making.
- Culture principles: Extreme Ownership, Engineer Out Requirements then Automate, Share Your Legos.
- Join us as we build the future of responsible mineral sourcing and supply.