Core Driller Assistant
Assist the Core Driller in diamond core drilling operations at an open-pit copper mine, focusing on safety and equipment care.
Posted by employer 7 hours ago
First seen on Joblaze 4 hours ago
Last verified on the company career page 4 hours ago
What you'll build
- Help the Driller set up, move and tear down the drill rig
- Handle rods, core barrels, casing and tooling
- Pull, clean, measure, label and box core
- Mix and manage drilling fluids
- Keep drill logs and daily reports
Must have
- Experience as a driller's helper or comparable hands-on field work
- Real commitment to safety
- Valid driver's license
Nice to have
- Diamond core, reverse circulation or water-well drilling experience
- Strong mechanical aptitude
Practical constraints
- 7 days on / 7 days off
- 12-hour day shifts
Not disclosed in this posting: compensation, years of experience, visa sponsorship.
Benefits
Joblaze summary
The Core Driller Assistant supports the Core Driller in diamond core drilling operations at an open-pit copper mine, focusing on safe rig setup, core handling, and equipment maintenance. Key skills include experience with various drilling techniques and a strong mechanical aptitude, along with a commitment to safety protocols. This role is ideal for individuals looking to advance their careers in drilling, particularly those with hands-on experience in field or construction work. Mariana Minerals emphasizes a culture of safety and collaboration as it aims to innovate in the minerals supply chain.
Joblaze insights
- Listed today — first seen on Joblaze October 7, 2026. Last confirmed on Mariana Minerals's careers page October 7, 2026.
Quick facts
- Is the Core Driller Assistant role remote?
- No — this is an on-site role in Moab, UT, United States.
- Where is the role based?
- Mariana Minerals is hiring for this position in Moab, UT, United States.
- What seniority level is this role?
- Mariana Minerals targets junior candidates for this position.
- Is this full-time or contract?
- Full-time for this Core Driller Assistant role at Mariana Minerals.
From the original posting
The Core Driller Assistant works alongside the Core Driller to support diamond core drilling for mineral exploration and resource definition at our open-pit copper mine. The role focuses on safe rig operations, careful core handling and recovery, equipment care, and following health, safety and environmental standards. Experience with reverse circulation (RC), air rotary or water-well drilling carries over well. It's a strong entry point for anyone looking to build a career toward Driller. Help us build the world's first fully autonomous mine.
Responsibilities
Help the Driller safely set up, move and tear down the drill rig and drill pad
Handle rods, core barrels, casing and tooling 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 maintain water lines, pumps and supply systems
Do pre-start inspections, greasing, lubrication and basic maintenance on the rig, compressors, pumps and support equipment
Help keep drill logs, footage drilled, consumables used and daily reports
Keep an inventory of bits and supplies, and let the Driller know when stock is low
Recognize changes in ground conditions and flag them to the Driller and geologist
Keep the drill pad and equipment area clean and organized
Handle equipment breakdowns and emergencies with a calm, safety-first approach
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
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:
Standard company text repeated across Mariana Minerals's postings is omitted here.