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.

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.

Housing can be provided onsite.

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)

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!