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Compass Minerals (NYSE: CMP) is a leading global provider of essential minerals focused on safely delivering where and when it matters to help solve nature's challenges for customers and communities. The company's salt products help keep roadways safe during winter weather and are used in numerous other consumer, industrial, chemical and agricultural applications. Its plant nutrition products help improve the quality and yield of crops while supporting sustainable agriculture. Compass Minerals operates 11 production and packaging facilities with more than 1,800 employees throughout the U.S., Canada and the U.K. Visit compassminerals.com for more information about the company and its products.
Summary: The Principal Mine Planning Engineer is the senior technical authority for underground mine planning, responsible for the integrity, optimization, and execution-readiness of short-term, mid-range, and life-of-mine plans.
This role provides strategic and operational leadership for a large underground mining operation, ensuring mine plans are safe, practical, compliant, and aligned with production, safety, and business objectives. The position leads multidisciplinary planning teams, integrates technical disciplines, and serves as the primary interface between strategic planning and day-to-day execution.
Essential Job Functions: Included but not limited to the following:
(Management reserves the right to add or modify the duties and responsibilities at any time.)

• Serve as the senior technical authority for underground mine planning, providing independent expert judgment, technical direction, and assurance for short-term, mid-range, and life-of-mine plans.
• Lead and mentor engineers, surveyors, technicians, interns, and technical contractors in the development and execution of mine plans and planning strategies.
• Develop, optimize, and technically govern mine plans that integrate geology, geotechnical conditions, ventilation, utilities, equipment capabilities, and operational constraints.
• Direct and technically govern mine design activities, including development layouts, sequencing, pillar design, and supporting infrastructure.
• Provide technical oversight of underground utilities and systems-including ventilation, atmospheric monitoring, power, water, compressed air, and communications-to ensure regulatory compliance, safety, and execution feasibility.
• Convert strategic and long-range mine plans into actionable, clearly sequenced execution plans that operations can reliably implement.
• Serve as the primary interface between mine planning and execution, ensuring plans are clearly communicated, understood, and executable by operations and frontline leadership.
• Facilitate technical syndication of mine plans across operations, maintenance, safety, leadership, and other stakeholders to ensure alignment, feasibility, and shared ownership.
• Facilitate and participate in technical reviews, planning forums, and execution-readiness discussions to proactively identify risks, conflicts, and constraints prior to implementation.
• Apply advanced analytics, scenario modeling, and trade-off studies to optimize mine design, sequencing, production rates, recovery and capital efficiency.
• Support ground control inspection, monitoring, and risk mitigation programs in collaboration with geotechnical teams.
• Support exploration programs, including drilling, seismic activities, and geologic modeling; contribute to mineral resource and reserve estimation and validation.
• Assess plan performance through reconciliation and variance analysis; integrate lessons learned and operational feedback into continuous plan improvement.
• Create and sustain high-quality planning deliverables, including schedules, layouts, models, and technical documentation that clearly articulate design intent and assumptions.
• Guide production scheduling and mine services planning while driving continuous improvement in planning processes.
• Identify, assess, and escalate planning-driven risks and constraints that may impact safety, production, schedule, or capital outcomes; lead mitigation planning in collaboration with stakeholders.
• Lead or contribute to capital projects related to underground development and infrastructure upgrades.
• Act as a key contributor to annual budgeting, forecasting, long-range capital planning, and resource and reserve reporting.
• Enforce compliance with safety standards, regulatory requirements, and company engineering practices while optimizing operational and economic outcomes.

Minimum Required Qualifications:
To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative knowledge, skill, and/or ability required.
Education and Experience:

• Bachelor's Degree in Mining Engineering, Geotechnical Engineering, Geology, or a related discipline, or equivalent combination of education and experience.
• 10 years of progressive experience in underground mining operations with increasing technical responsibility.
• Demonstrated expertise in short-term, mid-range, and life-of-mine planning for underground operations.
• Demonstrated advanced proficiency in mine planning tools and methodologies, with emphasis on planning quality and design support rather than software operation alone.
• Proficiency in mine planning, surveying, AutoCAD, ventilation modeling, and related software (e.g., Deswik, Maptek, Leica Geosystems, GPS, VnetPC, Ventsim, and AggFlow).
• Strong data literacy; experience querying databases and building dashboards and analytics in Power BI.

Preferred:

• Professional Engineer (PE) license.
• Experience managing and/or mentoring technical teams.
• Experience managing a salaried and hourly workforce.
• Experience working in unionized environments.

Physical Requirements:
The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.

• Ability to walk up to 2 miles over uneven underground and surface terrain.
• Ability to wear required personal protective equipment (PPE).
• Ability to stoop, kneel, crouch, climb ladders, and crawl in confined or restricted spaces.
• Ability to lift and/or move up to 10 pounds routinely and up to 50 pounds occasionally.
• Vision abilities include close vision, depth perception, and the ability to adjust focus.
• Periodic work in hoists, shafts, and underground mine environments involving close-quarters conditions, limited clearance, vertical access, and exposure to hot, humid, dusty, and noisy conditions.
• Perform indoor and outdoor work in adverse weather conditions.

Compass Minerals is an equal opportunity and affirmative action employer. We are firmly committed to making all employment-related decisions without regard to race, ancestry, ethnicity, color, religious creed or belief, national origin, sex (including sexual orientation, gender identity, and pregnancy and breastfeeding), age, military or veteran status, status as a qualified individual with a disability, genetic information, and any other characteristic protected by law. Learn more about equal employment opportunity laws at dol.gov. April 2026
Equal Opportunity Employer
This employer is required to notify all applicants of their rights pursuant to federal employment laws.
For further information, please review the Know Your Rights notice from the Department of Labor.