Mine Maintenance Supervisor

About the Company

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.

About the Role

The Mine Maintenance Supervisor is a safety-focused leader responsible for overseeing a team of technicians and ensuring the efficient operation of mine equipment. This role requires strong technical and problem-solving skills to diagnose and repair equipment, as well as excellent communication and organizational abilities to manage work orders, parts, and projects. The Mine Maintenance Supervisor will foster a positive work environment, prioritize safety, and collaborate effectively with other departments to maximize productivity and minimize downtime.

Responsibilities

• Safety and Compliance:
  • Conduct daily safety meetings and workplace inspections to ensure a safe work environment.
  • Manage and maintain technician daily logs, incident/accident reports, and investigation documentation.
  • Ensure compliance with all relevant safety regulations and company policies.
• Crew Management:
  • Complete timecards for crew in an accurate and timely manner.
  • Supervise and lead a team of maintenance technicians.
  • Assign tasks and prioritize workload to ensure efficient completion of maintenance activities.
  • Foster a positive and collaborative team environment.
  • Provide guidance, mentorship, and training to develop technician skills and knowledge.
  • Promote and maintain a clean, organized, and safe work area.
• Workload Management:
  • Effectively manage time and resources to meet deadlines and production targets.
  • Prioritize maintenance tasks based on urgency and impact on operations.
  • Plan and organize projects, including coordinating tooling, parts, and personnel.
• Work Order Management:
  • Create, review, and complete work orders accurately and efficiently.
  • Communicate effectively with planners to ensure proper scheduling and resource allocation.
• Parts Management:
  • Create, review, and manage parts lists for maintenance activities.
  • Communicate with vendors to source and procure necessary parts.
  • Research and identify suitable replacement parts and gather technical information.
• Equipment Repair:
  • Perform hands-on, in-the-field repairs and troubleshooting alongside the maintenance team as needed to support operational needs.
  • Research technical information and parts requirements for repairs.
  • Advise planners on necessary repairs and estimated downtime.
  • Manage equipment availability and reporting to optimize operational efficiency.
  • Collaborate with other departments to ensure timely and effective equipment repair.

Requirements

• Experience managing a team in mobile or vehicle maintenance, preferably in a mine setting.
• Exceptional communication, interpersonal, and coordination skills.
• Proficient in Microsoft Office Suite, especially Excel and Outlook.
• Proficiency in various welding techniques and safe handling of related equipment.
• Comprehensive understanding of vehicle systems, including hydraulics, electrical, filtration, fuel, A/C and refrigeration, with the ability to troubleshoot, repair, and perform preventative maintenance.
• Ability to perform advanced troubleshooting and failure analysis, utilizing electronic diagnostic tools and interpreting maintenance manuals and schematics.
• Knowledge and skill in maintaining various pumps, compressors, boilers, and other plant equipment.
• Ability to work rotating shifts, with the understanding that the shift schedule may change as needed.
• Willingness and ability to perform manual labor tasks as required.
• Proficiency in the use of maintenance tracking software.
• Ability to read and understand Material Safety Data Sheets (MSDS).
• Possess a valid driver's license.
• Ability to work extended hours, overtime, and be available for on-call status.

Company Culture

Our culture is built on three principles:

• 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.