Diamond/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.

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.

Summary

The Diamond/Core Driller is responsible for safely and efficiently operating diamond drilling equipment to recover high-quality core samples for mineral exploration and geological evaluation. This role requires precision drilling, strong mechanical skills, and strict adherence to safety, environmental, and quality standards, often in remote or challenging conditions.

Responsibilities

• Safely operate diamond/core drilling rigs in accordance with company procedures, manufacturer guidelines, and regulatory requirements

• Conduct pre-start inspections and ongoing checks of drill rigs, rods, core barrels, pumps, and support equipment

• Accurately set up drill sites, align rigs, and collar holes to specified angles, depths, and locations

• Monitor drilling parameters including rotation speed, bit pressure, water flow, and penetration rates to optimize core recovery and equipment performance

• Ensure maximum core recovery, correct handling, and proper placement of core in trays

• Identify and respond to changing ground conditions and communicate technical or geological issues to supervisors and geologists

• Perform routine maintenance, lubrication, and minor mechanical repairs to minimize downtime

• Maintain accurate drilling records, including meterage, core recovery, consumables usage, and daily reports

• Enforce safe work practices for offsiders and ensure compliance with health, safety, and environmental policies

• Maintain high housekeeping standards at the drill site

• Participate in toolbox talks, safety meetings, and ongoing training programs

• Respond appropriately to equipment failures, emergencies, and changing site conditions

Qualifications

• Proven experience as a Diamond/Core Driller in mineral exploration or mining environments

• Strong understanding of diamond drilling techniques, core recovery methods, and basic geology

• Mechanical aptitude with the ability to troubleshoot and perform routine maintenance

• Strong commitment to workplace health and safety

• Ability to work long shifts in remote or FIFO environments

• Physically fit and capable of working in varying weather conditions

• Valid driver’s license (appropriate class)

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.

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.