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.

About the Role

Mariana Minerals is seeking a Staff Mining Engineer with 10+ years of mining experience and a strong background in hands-on, hard-rock open pit operations. This role connects mine planning with field execution, ensuring that designs and production schedules translate into safe, practical, and efficient mining activities.

You will lead short- and medium-term mine planning, support daily production execution, and improve mining performance. The ideal candidate understands how a mine actually operates: equipment capabilities, achievable productivities, operational delays, and the constraints that determine whether a plan can be delivered.

What You'll Do

• Lead safety and uphold standards. Demonstrate visible safety leadership in the field. Incorporate operational risks, geotechnical requirements, and applicable standards into mine desig