Mariana Minerals

3 weeks ago

Mechanical Maintenance Technician

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 7 hours agoStatus: Live

Job Summary

Join the San Francisco pilot plant team to support the design, installation, and maintenance of first-of-its-kind refining processes for critical minerals. Perform preventive and corrective maintenance on pumps, valves, piping, and filtration systems; troubleshoot and repair mechanical issues; and help with fabrication, commissioning, and startup of new equipment. Read engineering drawings and follow plant safety procedures (LOTO, hot work, confined space), while using CMMS to document maintenance work.

Location: San Francisco

Workplace: Onsite

Employment Type: Full time

Job Function: Field Service, Maintenance & Skilled Trades

Seniority: Mid level

Key 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 (LOTO, hot work permitting, confined space entry) and document work in CMMS.

Pay and Benefits

Salary: USD 45 - 55 hourly

Equity and Bonus:Equity

Key Requirements

•Associate degree, technical certificate, or equivalent hands-on experience in industrial maintenance, mechanical technology, or millwright work.
•3+ years maintaining industrial or pilot-scale equipment in minerals processing, chemicals, specialty materials, oil & gas, biotech, or similar industries.
•Hands-on experience with pump repair, valve replacement, and instrument troubleshooting.
•Hands-on experience fabricating, modifying, and/or constructing industrial equipment.
•Familiarity with plant safety practices including Lockout/Tagout (LOTO), hot work permits, and confined space entry; ability to read P&IDs and equipment drawings.

Experience:3+ yearsMinerals processingChemicalsOil & gasBiotechIndustrial maintenancePilot-scale equipment

Education:Associate's

Skills:Safety-focusedTroubleshootingCollaborationAttention to detailDocumentation

Tech Stack:CMMSP&IDsLockout/Tagout (LOTO)

Company Brief

Mariana Minerals

Software-first, vertically integrated minerals company developing extraction, processing, and automation systems to supply critical minerals (lithium and others) for energy, AI, and defense technologies, and building commercial-scale lithium facilities from produced water.

Industry: Mining & Metals

Company Size: Small (11 to 50 employees)

Growth: Early Stage Startup

Funding: Series A

Headquarters: San Francisco, United States

Website LinkedIn Glassdoor

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Mariana Minerals

3 weeks ago

Mechanical Maintenance Technician

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 7 hours agoStatus: Live

Job Summary

Location: San Francisco

Workplace: Onsite

Employment Type: Full time

Job Function: Field Service, Maintenance & Skilled Trades

Seniority: Mid level

Key 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 (LOTO, hot work permitting, confined space entry) and document work in CMMS.

Pay and Benefits

Salary: USD 45 - 55 hourly

Equity and Bonus:Equity

Key Requirements

•Associate degree, technical certificate, or equivalent hands-on experience in industrial maintenance, mechanical technology, or millwright work.
•3+ years maintaining industrial or pilot-scale equipment in minerals processing, chemicals, specialty materials, oil & gas, biotech, or similar industries.
•Hands-on experience with pump repair, valve replacement, and instrument troubleshooting.
•Hands-on experience fabricating, modifying, and/or constructing industrial equipment.
•Familiarity with plant safety practices including Lockout/Tagout (LOTO), hot work permits, and confined space entry; ability to read P&IDs and equipment drawings.

Experience:3+ yearsMinerals processingChemicalsOil & gasBiotechIndustrial maintenancePilot-scale equipment

Education:Associate's

Skills:Safety-focusedTroubleshootingCollaborationAttention to detailDocumentation

Tech Stack:CMMSP&IDsLockout/Tagout (LOTO)

Company Brief

Mariana Minerals

Industry: Mining & Metals

Company Size: Small (11 to 50 employees)

Growth: Early Stage Startup

Funding: Series A

Headquarters: San Francisco, United States

Website LinkedIn Glassdoor