Core Driller

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.

The Core Driller operates diamond core drill rigs at our open-pit copper mine, drilling for mineral exploration and resource definition. The role focuses on safe, accurate drilling to plan, high-quality core recovery, equipment care, and following health, safety and environmental standards. Diamond core experience is ideal, but we also welcome strong drillers from reverse circulation (RC), air rotary or blast hole backgrounds. A driller who can lead and train a Driller Assistant is strongly preferred. Help us build the world's first fully autonomous mine.

Responsibilities

Safely operate a diamond core drill rig in line with site procedures, manufacturer specs and MSHA requirements

Collar holes accurately and hold the right angles, depths and alignment per the drill plan

Do thorough pre-start inspections, routine servicing and basic troubleshooting to keep downtime low

Monitor and adjust drilling parameters such as fluid pressure, rotation speed, weight on bit and penetration rate

Make sure core is recovered, measured, labeled and boxed correctly, with good contamination control

Keep accurate drill logs, footage drilled and daily production reports

Recognize changes in ground conditions and flag them to the geologist and supervisors

Lead and mentor the Driller Assistant and keep the crew working safely

Keep the drill pad and equipment area clean and organized

Handle equipment breakdowns and emergencies with a calm, safety-first approach

Qualifications

2+ years of drilling experience, ideally as a diamond core driller

RC, air rotary or blast hole drillers are also encouraged to apply

Strong mechanical aptitude and a solid understanding of drilling techniques and equipment

Experience training or leading drill helpers is a strong plus

Real commitment to safety

Valid driver's license; CDL is a plus

Schedule

7 days on / 7 days off, 12-hour day shifts

Housing & Relocation: Housing and relocation assistance options are available.

Working Environment & Physical Requirements

Work 12-hour shifts outdoors on drill pads and rugged terrain, in all weather and extreme temperatures

Lift at least 50 lbs, with exposure to dust, noise, vibration and diesel

Wear all required PPE (hard hat, steel toes, safety glasses, hi-vis, hearing protection, and a respirator when required)

Our culture is built on four principles:

Everyone Gets Home Safe. We never put speed or cost ahead of people.

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!