---
title: 'Maintenance Mechanic at Mariana Minerals'
canonical: 'https://feeny.ai/job/maintenance-mechanic-mariana-minerals-moab-bc9jcgbeg61b'
type: 'job'
last_seen: '2026-09-11'
---

# Maintenance Mechanic at Mariana Minerals

- **Company:** Mariana Minerals
- **Location:** Moab, UT
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-09-10
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.ashbyhq.com/marianaminerals/c2de39ab-ebff-439e-b0e9-27657d80e5fd

## Job description

## 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. Through its Copper One platform, Mariana Minerals owns and operates the Lisbon Valley Mining Company, a producing open-pit copper mine in southeastern Utah. The operation relies on safe, reliable mobile equipment to support drilling, blasting, loading, hauling, crushing, and heap leach processing. The Mine Maintenance Mechanic is a hands-on role responsible for diagnosing, repairing, inspecting, and maintaining heavy mobile equipment and support systems in both shop and field environments. The ideal candidate brings strong troubleshooting skills, mining or heavy industrial experience, and a strong safety mindset, with a focus on reducing downtime, improving equipment reliability, and supporting safe, efficient production.

Required Qualifications:

- Perform mechanical, hydraulic, electrical, and pneumatic diagnostics, troubleshooting, and repairs on mobile mining equipment, including haul trucks, loaders, dozers, graders, and ancillary equipment.
- Conduct preventive maintenance, routine inspections, and condition-monitoring activities in accordance with OEM guidelines and established maintenance schedules.
- Diagnose equipment failures, identify root causes, complete corrective repairs, and support reliability initiatives that improve equipment availability and reduce downtime.
- Service and repair auxiliary equipment, including light vehicles, compressors, pumps, generators, and other site equipment as needed.
- Perform maintenance in both shop and field environments, safely operating service trucks, cranes, lifting devices, specialty tools, and diagnostic equipment.
- Accurately document inspections, repairs, parts used, equipment condition, and maintenance activity in work orders, logs, and maintenance systems.
- Follow MSHA regulations, lockout/tagout procedures, PPE requirements, company policies, and equipment-specific SOPs while maintaining safe, organized work areas.

Required Qualifications

- High school diploma or GED; technical or vocational training in mechanics or maintenance preferred.
- Minimum 3 years of maintenance experience in mining, heavy equipment, construction, industrial, or similar environments.
- Strong working knowledge of diesel engines, hydraulics, drivetrains, electrical systems, and heavy equipment components.
- Ability to read and interpret schematics, service manuals, and diagnostic documentation.
- Proficiency with troubleshooting tools, mechanical testing equipment, and service trucks.
- Strong communication skills and ability to work effectively with operators, supervisors, and technical teams.
- Ability to work safely in an active mine environment and perform physically demanding tasks.
- Experience working on Caterpillar, Komatsu, or other large mining equipment brands.
- Familiarity with computerized maintenance management systems (CMMS).
- Welding and fabrication skills (MIG, stick, cutting).
- Experience performing field repairs in remote or rugged conditions.
- Knowledge of predictive maintenance and equipment health monitoring techniques.

Working Environment and Schedule:

- Schedule: 7 days on / 7 days off, working 12-hour shifts. As operations expand, employees may rotate between day and night shifts and must be available for on-call coverage as needed.
- Housing & Relocation: Housing and relocation assistance options are available.
- Work Environment: Approximately 70% field-based and 30% office-based work, including work in active mining areas, rugged terrain, and outdoor conditions.
- Ability to walk long distances over rough or uneven terrain, climb ladders and structures, and lift a minimum of 50 pounds.
- Ability to work safely in all weather conditions, including extreme temperatures, and in environments with potential exposure to dust, fumes, diesel exhaust, solvents, sulfuric acid, and other hazardous materials.
- Must wear and properly use all required PPE, including hard hat, steel-toed footwear, safety glasses, high-visibility vest, hearing protection, respirator when required, and protective clothing.

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!

## About Mariana Minerals

## Company Overview
- **One-liner**: Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies.
- **Entity Type**: Private (Series A, $85M funding in July 2025)
- **Headquarters**: San Francisco, California, United States
- **Founded**: Not publicly available
- **Founders**: Turner Caldwell (Co-Founder & CEO)

## Core Business
- **Primary industry**: Metal Ore Mining / Critical Minerals
- **Target customers**: B2B – energy, AI, and defense supply chains (including downstream manufacturers and government entities)
- **Mission or purpose**: "Create a future of critical mineral abundance" by reimagining the global minerals supply chain with software, automation, and data-driven decision making.

## Products & Services
- **Copper One (formerly Lisbon Valley Copper Mine)**: World’s first autonomous mine, located in Utah. Produces copper using integrated automation and software control. Restarted production in April 2026.
- **Lithium One**: Lithium project (on the roadmap or early development).
- **Other mineral projects**: Graphite, Uranium, Rare Earth Metals, Cobalt, Nickel, Aluminium – at various stages (stealth or roadmap).
- **CapitalProjectOS**: Internal software platform for capital project management (mentioned in leadership bio).
- **Technology Stack**: React, dbt, TypeScript, Python, TensorFlow, PyTorch, microservices, SCADA, Autodesk, and many others – indicating a strong software engineering backbone.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Total funding – $85M Series A (July 2025, 1 investor)
- **Notable Investors/Partners**: Lead investor not publicly disclosed (Andreessen Horowitz was pitched but not confirmed as an investor). Partners include Bot Auto, WeRide, Pronto, Atoms (based on LinkedIn mentions). Also works with UMA (Utah Mining Association).
- **Growth Signals**: Headcount grew 3,575% YoY to 107 employees (as of mid-2026). 73 active job postings. Opened the world’s first autonomous mine (Copper One) in April/May 2026, generating significant industry news and social media engagement.

## Competitive Advantages
- **Software-first approach**: The company builds automation and data systems from the ground up, rather than layering tech onto legacy mining operations. This enables fully autonomous mining.
- **Vertical integration**: They develop, own, and operate mineral projects, controlling the entire value chain from extraction to processing.
- **Deep tech stack**: Use of AI/ML (TensorFlow, PyTorch), simulation, and real-time control systems to optimize mining operations.
- **First-mover in autonomous mining**: Copper One is claimed to be the world’s first autonomous mine, giving them a significant lead in operational efficiency and safety.

## Strategic Focus
- Scale autonomous mining operations beyond copper (lithium, graphite, uranium, etc.)
- Secure domestic supply of critical minerals for U.S. energy, AI, and defense needs.
- Continue aggressive hiring across engineering, operations, and field roles.
- Expand from Utah to additional sites (Houston engineering office, potential new projects).

## Why Work Here
- **Culture principles**: "Extreme Ownership", "Engineer Out Requirements, Then Automate", "Share Your Legos" – emphasizing accountability, simplification, and collaboration.
- **Work environment**: High-growth startup with a mission-driven focus on critical infrastructure. Offices in San Francisco (HQ), Houston (Engineering), and La Sal, Utah (mine site). Hybrid/remote policy not explicitly stated, but multiple office locations suggest flexibility for field vs. office roles.
- **Notable perks**: Opportunity to work on cutting-edge autonomous systems and AI in a traditional industry. Strong engineering culture with modern tech stack (React, Python, ML). Rapid career growth due to company expansion.
- **Talent sources**: Attracts talent from Tesla, Redwood Materials, Lilac, ExxonMobil, Amazon Web Services, and other tech/energy companies – indicating a high-caliber peer group.

## Sources
1. [marianaminerals.com](https://marianaminerals.com/)
2. [marianaminerals.com/careers](https://marianaminerals.com/careers)
3. [marianaminerals.com/about](https://marianaminerals.com/about)
4. [jobs.ashbyhq.com/marianaminerals](https://jobs.ashbyhq.com/marianaminerals)
5. [linkedin.com/company/mariana-minerals](https://www.linkedin.com/company/mariana-minerals)

## Other roles at Mariana Minerals

- [Sr./Staff Process Engineer - Detailed Engineering and Plant Design](https://feeny.ai/job/sr-staff-process-engineer-detailed-engineering-and-plant-design-mariana-m9xewg6hdcc5) — Houston, TX
- [Industrial Electrician](https://feeny.ai/job/industrial-electrician-mariana-minerals-moab-snerjqgb4qbh) — Moab, UT
- [Sr. Technical Recruiter](https://feeny.ai/job/sr-technical-recruiter-mariana-minerals-san-francisco-hr9b2676c4vw) — San Francisco, CA
- [R&D Metallurgist](https://feeny.ai/job/r-d-metallurgist-mariana-minerals-san-francisco-2y0a92fe9ese) — San Francisco, CA
- [Process Maintenance Technician](https://feeny.ai/job/process-maintenance-technician-mariana-minerals-moab-c6pyeb53jmef) — Moab, UT
- [Mobile Maintenance Supervisor](https://feeny.ai/job/mobile-maintenance-supervisor-mariana-minerals-moab-0zyyzma9tm1n) — Moab, UT
- [Sr./Staff Pyrometallurgical Process Engineer](https://feeny.ai/job/sr-staff-pyrometallurgical-process-engineer-mariana-minerals-houston-dpv5c9qyznbb) — Houston, TX
- [Electrician](https://feeny.ai/job/electrician-mariana-minerals-east-50vs2farzxq5) — East, TX
- [Staff Process Controls Engineer - Networking and Systems Administration](https://feeny.ai/job/staff-process-controls-engineer-networking-and-systems-administration-mariana-yysg2twzjx6r) — San Francisco, CA
- [Staff Process Controls Engineer - Pilot Plant](https://feeny.ai/job/staff-process-controls-engineer-pilot-plant-mariana-minerals-san-francisco-f58dynjt6zw6) — San Francisco, CA