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 Assistant works alongside the Driller to support diamond core drilling for mineral exploration and resource definition. The role focuses on safe rig operations, careful core handling, equipment care, and following health, safety and environmental standards, often at remote sites. It's a strong entry point for anyone looking to build a career toward Driller. Housing can be provided onsite.

Responsibilities

• Operate support equipment such as water trucks, forklifts or light vehicles as needed

• Assist the Driller set up, move and tear down the drill rig and drill pad

• Handle rods, core barrels, casing and tooling safely while tripping in and out of the hole

• Pull, clean, measure, label and box core accurately, with good contamination control

• Mix and manage drilling fluids and additives, and maintain water lines, pumps and supply systems

• Do daily pre-start inspections, greasing, lubrication and basic maintenance on the rig and support equipment

• Keep an inventory of bits, consumables and supplies, and let the Driller know when stock is low

• Help record meters drilled, consumables used and daily drill reports

• Keep the drill pad clean and hazard-free, and report unsafe conditions, equipment issues or ground changes to the Driller right away

Qualifications

• Experience as a driller's helper, offsider or rig hand, or comparable hands-on field, construction or mechanical work

• Diamond core, reverse circulation (RC) or water-well drilling experience is a plus

• Strong mechanical aptitude and willingness to learn drilling techniques and equipment

• Real commitment to safety and following procedures

Work Environment

• Days only, 12-hour shifts, 7 on / 7 off, housing options available.

• Physically demanding outdoor work at remote sites in all weather, including heavy lifting, dust, mud and noise

• Follow all site safety procedures, MSHA requirements and PPE rules, and take part in toolbox talks, safety audits and ongoing training

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!