Chief Mine Engineer

Position Title Reports To

Senior Vice President, Projects

JCM Mine Manager

Phoenix, Arizona HQ office with frequent travel to JCM mine site. In-Office position

The Chief Mining Engineer is responsible for leading the mining engineering strategy, optimization, and technical development of the Gunnison Copper Project. Reporting directly to the Senior Vice President, Projects, the role serves as the senior mining engineering authority for mine planning, pit optimization, mine design, production forecasting, technical studies, and life-of-mine planning. This is a hands
-on role.

The primary focus of the role is maximizing the value, efficiency, and long-term performance of the Gunnison Copper Project through rigorous technical analysis, project optimization, and integration of mining, heap leach, and SXEW operations. The Chief Mining Engineer will lead mining engineering inputs to project execution, expansion planning, economic evaluations, and operational readiness activities while ensuring alignment with corporate objectives and project development milestones.

The position maintains a collaborative dotted-line relationship with the JCM Mine Manager to ensure consistency of technical standards and sharing of operational knowledge across Gunnison Copper assets.

• Lead continuous optimization of the Gunnison Copper Project mine plan, production strategy, and development sequencing.
• Identify opportunities to increase project value through pit optimization, mine scheduling, production improvements, operating cost reductions, and capital efficiency initiatives.
• Evaluate trade-offs between mining, heap leach, and SXEW operations to maximize overall project economics.
• Develop and maintain economic models supporting project optimization and strategic decision-making.
• Lead technical evaluations of alternative mine plans, production scenarios, expansion opportunities, and development strategies.
• Support executive decision-making through quantitative analysis and technical recommendations.

• Develop and maintain strategic mine plans, annual plans, and life-of-mine schedules.
• Lead pit optimization, phase design, pushback development, and mine sequencing activities.
• Ensure mine plans support production objectives, processing requirements, and business goals.
• Coordinate mine planning activities with geology, metallurgy, processing, environmental, and project teams.
• Manage updates to mine planning assumptions and optimization parameters.

• Lead mining engineering components of prefeasibility, feasibility, expansion, and execution-stage studies.
• Support development of technical work programs and engineering studies required for project advancement.
• Manage external mining consultants and technical advisors.
• Review and validate engineering studies, technical reports, and economic evaluations.
• Support future project expansion opportunities and long-range development planning.

• Work closely with metallurgy, process engineering, and operations teams to optimize the integration of mining activities with heap leach and SXEW facilities.
• Evaluate ore delivery strategies, blending opportunities, and leach pad utilization.
• Support initiatives to improve copper recovery, operating efficiency, and project economics.
• Ensure mine plans support processing requirements and long-term production objectives.

• Support development of operating plans, production forecasts, and technical systems required for future operations.
• Assist in establishing mine planning processes, technical standards, and performance metrics.
• Provide technical leadership during project execution and commissioning phases.
• Ensure mine planning systems and technical support structures are established to support sustainable operations.

• Support resource model updates, reserve estimation activities, and reconciliation programs.
• Ensure mine plans accurately reflect current geological interpretations and economic assumptions.
• Participate in technical reviews and reserve reporting activities.
• Support preparation of technical disclosures and regulatory reporting requirements.

• Serve as the senior mining engineering authority for the Gunnison Copper Project.
• Establish and maintain mining engineering standards, procedures, and best practices.
• Mentor and support mine planning and technical services personnel.
• Foster a culture of technical excellence, innovation, and continuous improvement.
• Provide technical leadership across multidisciplinary project teams.

• Maintain alignment with the JCM Mine Manager on mine planning standards, operational lessons learned, and technical best practices.
• Provide technical review and support for strategic mine planning initiatives as required.
• Facilitate knowledge transfer…