About Mariana Minerals
Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We’re reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making.
Position Overview
We are seeking a dynamic and results-oriented Mine Manager to lead all aspects of our surface mining operations. This pivotal role is responsible for ensuring safe, efficient, and cost-effective production while driving continuous improvement across drilling, blasting, loading, hauling, maintenance, and support functions. The ideal candidate will have a proven track record of delivering measurable cost savings, operational efficiencies, and safety enhancements, while fostering a high-performance, collaborative work culture.
This is a hands-on leadership position requiring demonstrated experience in mine expansion, crushing/conveying systems, leach pad stacking, and brownfield & greenfield mine development. The successful candidate will be able to provide specific examples of initiatives that have led to tangible improvements in production, maintenance, operator performance, and personnel development.
Key Responsibilities
Operational Leadership & Cost Efficiency
Develop and execute mine plans to achieve production targets while optimizing costs.
Lead and document continuous improvement projects (e.g., mine sequencing, haul road design, maintenance strategy changes) with clear ROI and payback periods.
Oversee drilling and blasting operations to maximize fragmentation and minimize costs.
Manage haulage and loading operations to improve cycle times and reduce operating expenses.
Provide specific examples of initiatives that resulted in hard-dollar savings (e.g., improved fleet utilization, reduced downtime, optimized blasting patterns, or fuel efficiency gains).
Maintenance & Fleet Performance
Implement preventive and predictive maintenance programs to extend equipment life and reduce repair costs.
Demonstrate past successes in reducing maintenance costs (e.g., extended component life, reduced rebuild frequency, improved parts inventory management).
Possess detailed knowledge of equipment repairs and maintenance program implementation, including experience working with major OEM equipment vendors and support personnel.
Optimize mobile fleet performance through operator training, telematics, and performance benchmarking.
Safety & Compliance
Champion a zero-harm culture through visible safety leadership and engagement.
Lead safety initiatives that have demonstrably reduced incidents (e.g., behavioral-based safety programs, near-miss reporting improvements, fatigue management).
Ensure full compliance with MSHA, OSHA, and environmental regulations.
Team Leadership & Culture Development
Lead and develop large, multidisciplinary teams (30+ personnel) across drilling, blasting, hauling, maintenance, and support functions.
Build high-performing teams through mentorship, skills development, and incentive structures that drive engagement and results.
Foster a positive workforce culture, reducing turnover, improving cross-shift communication, and encouraging employee-led innovation.
Lead by example supporting and participating in new technology implementation & testing
Mine Expansion & Capital Projects
Drive brownfield and greenfield mine development, including permitting, infrastructure, and commissioning.
Lead capital projects (e.g., crusher/conveyor installations, leach pad expansions, fleet upgrades) with a focus on cost control and execution efficiency.
Qualifications & Experience
Minimum 10 years of progressive experience in surface mining operations, with at least 5 years in a leadership role managing large teams (30+ employees) at high-production sites.
Demonstrated success in delivering operational improvements, cost savings, and safety enhancements.
Strong knowledge of mine planning, equipment maintenance, and regulatory compliance.
Experience with mine expansion, greenfield development, and capital project execution is highly desirable.
Excellent communication, leadership, and team-building skills.
Our culture is built on three principles:
Extreme Ownership – We take full responsibility for outcomes, relentlessly driving toward solutions.
Engineer Out Requirements, then Automate – We simplify, optimize, and then automate for scale.
Share Your Legos – We collaborate openly, share knowledge, and empower each other to build bigger, better solutions.
Join us as we build the future of responsible mineral sourcing and supply.