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. Position Summary The Industrial Electrician is responsible for installing, maintaining, troubleshooting, and repairing electrical systems and equipment in an active open-pit mining and processing environment. This role requires strong hands-on technical skills, experience with industrial power systems, and a consistent commitment to safety and regulatory compliance. The ideal candidate will have experience working with 3-phase industrial power systems , exposure to medium

• and high-voltage equipment , and the ability to troubleshoot complex electrical issues in a demanding, safety-sensitive environment.

Key Responsibilities Install, maintain, troubleshoot, and repair electrical wiring, equipment, and fixtures in compliance with

NEC, MSHA

, and applicable local, state, and federal codes. Diagnose electrical malfunctions using appropriate test equipment and perform corrective repairs efficiently and safely. Work primarily with 3-phase 480V systems , with occasional work on 4,160V and 13,800V electrical systems. Assemble, install, test, and maintain electrical and electronic wiring, conduit, controls, and components using hand tools, power tools, and precision measuring instruments. Identify malfunctioning systems and components, determine root causes, and implement effective solutions. Perform preventive maintenance to ensure electrical systems remain compliant and reliable. Coordinate with operations, maintenance, and engineering teams to support continuous mining and processing activities. Observe and follow all safety regulations and consistently use required personal protective equipment (PPE). Rectifier experience is a plus. Required Qualifications & Experience High school diploma or equivalent. Minimum 4 years of electrician experience , preferably in industrial, mining, or heavy manufacturing environments. MSHA certification or willingness to obtain. Ability to read and interpret electrical schematics, drawings, and diagrams. Proficiency with hand tools, power tools, and precision electrical testing instruments. Strong troubleshooting and problem-solving skills with the ability to work independently. Effective communication skills and ability to work collaboratively across departments. Basic computer skills, including familiarity with Microsoft Office . Desired Qualifications Experience working with rectifiers and medium

• to high-voltage systems .

Familiarity with industrial electrical codes and standards beyond NEC and MSHA. Ability to perform electrical repairs in remote, rugged, or outdoor environments. Physical Requirements Ability to walk long distances over rough, uneven terrain and climb ladders and structures. Ability to lift a minimum of 50 pounds . Ability to work in all weather conditions, including extreme temperatures. Must wear and properly use required PPE, including hard hat, steel-toed footwear, safety glasses, high-visibility vest, hearing protection, respirator (as required), and protective clothing. Ability to work in environments with potential exposure to dust, fumes, diesel exhaust, solvents, sulphuric acid, and other hazardous materials. 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.