Senior Geotechnical Engineer

requirements and industry best practices Monitoring, Operations & Field Support Design, implement, and interpret geotechnical instrumentation and monitoring programs (e.g. radar, lidar, piezometers), including thresholds and escalation protocols Provide geotechnical oversight and direct operational guidance during construction and active mining, including drill & blast, sequencing, and access decisions Respond to geotechnical issues with practical, field-ready engineering solutions Develop, implement, and maintain Ground Control Management Plans (GCMPs), including associated Trigger Action Response Plans (TARPs) Reporting & Collaboration Prepare geotechnical reports, memoranda, and design documentation for internal teams, consultants, and regulators Communicate findings and recommendations clearly to multidisciplinary project teams Coordinate with external consultants, contractors and regulatory agencies as required Mentor junior engineers and technically review consultant deliverables Support site teams with ongoing operational guidance Desired

Qualifications Bachelor’s degree in Geotechnical, Geological, or Civil Engineering (Master’s degree with geotechnical focus preferred) 3–8+ years of geotechnical engineering experience in mining operations and projects Experience supporting open pit (preferred) and/or underground (nice-to-have) mining projects Strong understanding of rock and soil mechanics, slope stability, and ground support principles Proficiency with geotechnical analysis software (e.g., Rocscience suite, FLAC, PLAXIS, GeoStudio) Familiarity with mine planning and 3D modeling tools (e.g., Leapfrog, Surpac, Deswik, GIS platforms) Strong technical writing and analytical skills Ability to work independently and in field-based environments Professional Engineer (P.E./P.Eng) or working toward registration Mine safety certifications (e.g., MSHA, First Aid)

Why Join Us? At Mariana Minerals, you’ll be part of a mission-driven team reshaping the way critical minerals are sourced and supplied globally. You’ll have the autonomy to make big decisions, the tools to innovate, and a culture that values ownership, smart automation, and collaboration. 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. Mariana is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected status.

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