Mechanical Engineer

Mariana Minerals
San Francisco
Workplace: OnsiteFull timeUSD 100,000 - 150,000 annuallyFunction: Field Service, Maintenance & Skilled TradesEducation: bachelorsSkills: ["Troubleshooting","Problem-solving","Technical writing","Communication","Teamwork"]

Join the San Francisco Pilot Plant team to support first-of-its-kind refining processes for critical minerals. You’ll drive mechanical design, fabrication, installation, commissioning, and troubleshooting of pilot plant equipment, partnering with process engineers and R&D scientists to translate requirements into reliable mechanical systems. You’ll also build and maintain engineering documentation (P&IDs, drawings, CAD models, and equipment manuals) and help improve equipment reliability, safety, and operational performance, with occasional travel to support projects.

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FursaFursa
Mariana Minerals
Mariana Minerals
2 days ago

Mechanical Engineer

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Last checked: 11 hours agoStatus: Live

Job Summary

Join the San Francisco Pilot Plant team to support first-of-its-kind refining processes for critical minerals. You’ll drive mechanical design, fabrication, installation, commissioning, and troubleshooting of pilot plant equipment, partnering with process engineers and R&D scientists to translate requirements into reliable mechanical systems. You’ll also build and maintain engineering documentation (P&IDs, drawings, CAD models, and equipment manuals) and help improve equipment reliability, safety, and operational performance, with occasional travel to support projects.
Location: San Francisco
Workplace: Onsite
Employment Type: Full time
Job Function: Field Service, Maintenance & Skilled Trades

Key Responsibilities

  • •Drive design, fabrication, installation, modification, startup, and commissioning of new equipment and pilot plant systems.
  • •Troubleshoot mechanical issues and implement practical solutions to maintain safe, reliable, and efficient plant operations.
  • •Collaborate with process engineers and R&D scientists to translate process requirements into equipment modifications and mechanical designs.
  • •Create and maintain engineering documentation including P&IDs, process and control narratives, equipment specifications, drawings, CAD models, and equipment manuals.
  • •Identify opportunities to improve equipment reliability, maintainability, and operational performance. Support software development to drive equipment design, plant reliability, and safe operation.

Pay and Benefits

Salary: USD 100,000 - 150,000 annually
Equity and Bonus:Equity
Perks:Equity

Key Requirements

  • •B.S., M.S., or PhD in Mechanical Engineering or a related field.
  • •Experience in automated manufacturing, operations, process scale-up, or plant design in minerals processing, chemicals, specialty materials, oil & gas, or related industries.
  • •Demonstrated experience driving equipment design, commissioning, operations, and reliability.
  • •Ability to take on additional scope across process engineering, operations, maintenance, and project execution.
  • •Strong troubleshooting and problem-solving skills in hands-on plant environments.
Experience:Minerals processingChemicalsSpecialty materialsOil & gasAutomated manufacturingProcess scale-upPilot plant
Education:Bachelor's in Mechanical Engineering
Skills:TroubleshootingProblem-solvingTechnical writingCommunicationTeamwork

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
WebsiteLinkedInGlassdoor