Location: Western USA
Position Type: Full-time, rotational (e.g. 14 days on / 14 days off, or 20 on / 10 off depending on mine schedule)
Pay Range: $18.00 to $27.00 hourly
Reporting To: Underground Core Driller / Shift Supervisor

At NISS, we operate both surface and underground core drilling programs across the Western U.S. We strive for excellence in safety, reliability, and quality drilling results. Our people are our greatest asset — we support training, advancement, and a safe working culture.

We are looking for a motivated Underground Core Driller’s Assistant / Helper to support drilling crews underground. In this role, you’ll assist the Driller with core handling, rig setup, maintenance tasks, and operating under the challenging conditions of underground mines. This is a physically demanding role in confined spaces, and you should be ready for extended underground shifts.

• Assist the Driller in operation and maintenance of underground core drilling rigs and associated tooling
• Handle and package core samples, rods, casings, and tooling safely and efficiently
• Support drilling station setup, relocation, and breakdown, including rig moves underground
• Perform general site cleanup and housekeeping around drill sites
• Participate in pre-shift inspections, safety meetings, and hazard assessments
• Maintain adequate lighting, ventilation, and water control near drill stations
• Operate small equipment or vehicles (e.g. carts, conveyors) under supervision
• Perform routine maintenance, lubrication, and minor repairs as directed
• Follow all MSHA, company, and client safety protocols and procedures
• Assist with sample logging, data entry, and documentation as needed

• Some experience in mining, underground work, construction, or drilling assistance preferred
• Strong willingness to learn; mechanical aptitude a plus
• Physically fit — able to lift 100+ lbs, work in confined spaces, crouch, climb, and endure long shifts
• Comfortable working underground in variable conditions (darkness, dust, humidity)
• Valid driver’s license, clean driving record
• Ability to pass pre-employment drug test, background check, and physical
• Good communication skills and ability to follow direction precisely
• Commitment to safety and ability to work as part of a team

• Rotational schedules typical: 14 on / 14 off, or 20 on / 10 off (per mine schedule)
• 12-hour shifts underground
• Work in tight, confined spaces, sometimes wet or dusty
• PPE provided (helmet, boots, respirator, lights, etc.)
• Travel and underground camp accommodations provided
• Exposure to underground hazards: rock, noise, vibration, dust, humidity

• Competitive hourly pay (based on experience)
• Overtime and shift premiums
• Travel per diem or allowances
• Comprehensive benefits (health, dental, vision, life insurance)
• Retirement / 401(k) plan or equivalent
• Paid MSHA or site-required training
• Clear path for advancement: Assistant → Underground Driller → Lead / Supervisor