Mechanical Maintenance Technician

Mariana Minerals • San Francisco, CA

4d • Onsite

About The Position

Mariana Minerals is looking for a highly motivated Mechanical Maintenance Technician to join our San Francisco Pilot Plant team. You will support the design, installation, and maintenance of first-of-its-kind refining processes for critical minerals. This position plays a critical role in bridging R&D and Operations, ensuring our equipment and work processes are robust, safe, cost-effective, and suitable for commercial production.

Requirements

• Associate degree, technical certificate, or equivalent hands-on experience in industrial maintenance, mechanical technology, millwright work, or a related field.
• 3+ years of experience maintaining industrial or pilot-scale equipment in the minerals processing, chemicals, specialty materials, oil & gas, biotech, or similar industries.
• Hands-on experience with maintenance tasks such as pump repair, valve replacement, and instrument troubleshooting
• Hands-on experience fabricating, modifying, and/or constructing industrial equipment
• Familiarity with core plant safety practices including Lockout/Tagout (LOTO), hot work permits, confined space entry, and safe work permitting systems.
• Ability to read and interpret engineering drawings such as P&IDs, equipment diagrams, and mechanical layouts.
• Experience documenting maintenance activities using CMMS or maintenance tracking systems.
• Ability to climb stairs, stand for extended periods of time, and safely lift up to 50 lbs.

Nice To Haves

• Experience working with rotating equipment, filtration systems, and industrial piping is a plus.

Responsibilities

• Perform preventive and corrective maintenance on plant equipment including pumps, valves, piping systems, filtration units, and other process equipment.
• Troubleshoot and repair mechanical issues to maintain safe and reliable plant operations.
• Assist with fabrication, installation, modification, startup, and commissioning of new equipment and pilot plant systems.
• Read and interpret engineering drawings, P&IDs, and equipment manuals to support maintenance and installation work.
• Safely perform maintenance activities following plant safety procedures including Lockout/Tagout (LOTO), hot work permitting, and confined space entry.
• Identify and maintain critical spare parts for the pilot plant
• Champion the site Computerized Maintenance Management System (CMMS) system

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: Associate degree