@MarianaMinerals - Mariana Minerals Co

San Francisco, CA
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102 job openings
Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies. website
Building a better minerals company. x.com/marianaminerals

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Turner Caldwell
San Francisco, CA

About

a16z AD 50 2026: Production is Deterrence

San Francisco, CA · Founded 2024 · Inputs

Turner Caldwell spent more than nine years at Tesla, moving from battery manufacturing to leading their minerals and metals programs. He co-founded Mariana Minerals , which bought Copper One, a copper mine and refinery in southeastern Utah, in late 2025. Mariana is automating mine and refining operations using their MarianaOS software that spans the entire lifecycle of mining development and operations. Funding raised in August 2026 supports the work at Copper One and the development of Lithium One in East Texas.

Source:  a16z.news

102 jobs
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Department
Job Title
Location Workplace Salary Posted 📅
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Job Title Location Workplace Salary Posted
Business Operations
 Business Operations ManagerHouston, TXonsite2026-09-22
Commercial & Product
 Commercial Manager, Energy & UtilitiesSan Francisco, CAonsite$130,000-190,0002026-10-21
 Logistics AnalystSan Francisco, CAonsite$85,000-120,0002026-10-14
 Logistics ManagerSan Francisco, CAonsite$130,000-190,0002026-10-14
 Procurement Manager, Chemicals & FuelsSan Francisco, CA; Houston, TXonsite$150,000-170,0002026-07-22
 Procurement Manager, Mobile EquipmentSan Francisco, CAonsite$130,000-190,0002026-10-21
Copper One
 Regional Environmental ManagerMoab, UTonsite2026-11-11
Engineering
 Extractive MetallurgistMoab, UTonsite$100,000-160,0002026-08-17
 Head of Engineering ProgramsSan Francisco, CA; Houston, TXonsite$180,000-240,0002026-06-26
 Mechatronics Engineer (Hardware)San Francisco, CAonsite$140,000-200,0002026-06-26
 Mine PlannerSan Francisco, CA; Houston, TX; Moab, UTonsite$140,000-175,0002026-07-21
 Sr./Staff Mechanical EngineerSan Francisco, CA; Houston, TXonsite$140,000-175,0002026-10-07
 Sr./Staff Technical Program Manager - CopperMoab, UTonsite2026-09-03
 Sr./Staff Technical Program Manager - LithiumSan Francisco, CAonsite$150,000-200,0002026-09-04
 Staff Mining EngineerHouston, TX; Moab, UTonsite$123,000-171,0002026-10-07
 Staff Mobile Equipment and Fleet EngineerSan Francisco, CA; Houston, TX; Moab, UTonsite$138,000-170,0002026-09-29
 Staff Process Modeling EngineerHouston, TXonsite$100,000-160,0002026-10-21
Finance
 Associate, Corporate DevelopmentHouston, TXonsite2026-10-23
 Manager, Corporate DevelopmentHouston, TXonsite2026-10-23
 Vice President of FinanceHouston, TXonsite2026-09-14
General
 Administrative AssistantHouston, TXonsite2026-11-12
 Recruiting CoordinatorHouston, TXonsite2026-11-06
 Recruiting CoordinatorSan Francisco, CAonsite$63,000-111,0002026-11-06
 Sr. RecruiterSan Francisco, CAonsite$100,000-175,0002026-10-07
 Sr. Technical RecruiterSan Francisco, CAonsite$100,000-175,0002026-10-14
 Workplace ManagerHouston, TXonsite2026-10-30
Legal
 Commercial CounselSan Francisco, CAonsite$130,000-185,0002026-10-15
 IP CounselSan Francisco, CAonsite$130,000-185,0002026-10-15
Plant Engineering
 Senior/Staff Chemical Process EngineerSan Francisco, CAonsite$140,000-175,0002026-10-26
Plant Operations
 Analytical Lab ChemistMoab, UTonsite2026-10-20
 Analytical Lab ChemistSan Francisco, CAonsite$110,000-130,0002026-11-13
 Analytical Systems Specialist / Applications ChemistSan Francisco, CA; Houston, TXonsite$85,000-100,0002026-10-20
 Blast Hole DrillerMoab, UTonsite2026-10-07
 Commissioning EngineerAustin, TX; Houston, TX; Moab, UTonsite2026-11-08
 Core DrillerMoab, UTonsite2026-10-07
 Core Driller AssistantMoab, UTonsite2026-10-07
 Custodian/General LaborMoab, UTonsite2026-09-15
 Director of Mining and Technical ServicesMoab, UTonsite2026-07-30
 Driller Assistant (Helper)Moab, UTonsite2026-10-12
 Lab TechnicianMoab, UTonsite2026-11-06
 Lead OperatorJoaquin, TXonsite2026-08-26
 Maintenance TechnicianJoaquin, TXonsite2026-11-10
 Maintenance Technician TraineeMoab, UTonsite2026-11-08
 Maintenance Technician – Electrical & ControlsJoaquin, TXonsite2026-11-10
 Mobile Maintenance SupervisorMoab, UTonsite2026-10-28
 OperatorMoab, UTonsite2026-10-06
 Process EngineerJoaquin, TXonsite2026-08-24
 Process EngineerMoab, UTonsite2026-10-26
 Process Maintenance TechnicianMoab, UTonsite2026-10-23
 Process Plant TechnicianMoab, UTonsite2026-10-19
 Process Safety EngineerHouston, TXonsite2026-07-07
 Production PlannerHouston, TX; Moab, UTonsite2026-10-15
 Project ElectricianMoab, UTonsite2026-10-02
 Project EngineerMoab, UTonsite2026-10-19
 Project Maintenance TechnicianMoab, UTonsite2026-10-19
 Recycling OperatorMoab, UTonsite2026-07-13
 Senior Safety EngineerHouston, TXonsite2026-10-13
 Sr. Environmental EngineerSan Francisco, CA; Houston, TX; Moab, UTonsite$100,000-150,0002026-09-16
 Sr. Regional Permitting and Compliance Environmental EngineerSan Francisco, CA; Houston, TX; Moab, UTonsite$100,000-150,0002026-10-06
 Stacking/Sizer OperatorMoab, UTonsite2026-10-29
Process Development
 Fabrication TechnicianSan Francisco, CAonsite$45-552026-10-20
 Laboratory TechnicianSan Francisco, CAonsite$40-452026-10-07
 Pilot Plant Operations ManagerHouston, TXonsite2026-10-14
 R&D MetallurgistSan Francisco, CAonsite$110,000-140,0002026-09-10
 R&D TechnicianSan Francisco, CAonsite$40-472026-10-29
 Sr./Staff Process Engineer - Detailed Engineering and Plant DesignHouston, TXonsite2026-10-14
 Staff Mechanical EngineerHouston, TXonsite$140,000-190,0002026-10-22
Product Development
 Staff Product Designer, MarianaOSSan Francisco, CAonsite$180,000-210,0002026-08-11
 Staff Product ManagerSan Francisco, CAonsite$180,000-210,0002026-06-23
 Staff Product Manager, Engineering & ConstructionSan Francisco, CAonsite$180,000-210,0002026-09-17
 Technical Product Manager, ML & RoboticsSan Francisco, CA; Ann Arbor, MI; Houston, TXonsite$115,000-208,0002026-09-23
Project & Construction Management
 BIM Design EngineerSan Francisco, CA; Houston, TXonsite$100,000-140,0002026-10-16
 Construction & Commissioning Quality EngineerHouston, TXonsite2026-10-21
 Document Control CoordinatorSan Francisco, CA; Houston, TXonsite$76,000-115,0002026-10-21
 Engineering CoordinatorSan Francisco, CA; Houston, TXonsite$100,000-140,0002026-10-09
 Plant Design ManagerSan Francisco, CA; Houston, TXonsite$140,000-190,0002026-10-14
 Procurement Manager, ConstructionSan Francisco, CA; Ann Arbor, MI; Houston, TX; Moab, UTonsite$130,000-180,0002026-11-09
 Procurement Manager, Process EquipmentSan Francisco, CA; Ann Arbor, MI; Houston, TX; Moab, UTonsite$130,000-180,0002026-08-20
 Site SuperintendentHouston, TXonsite2026-10-20
 Sr. Construction Project ManagerHouston, TXonsite2026-06-09
 Sr. Cost Control EngineerSan Francisco, CA; Houston, TXonsite$140,000-180,0002026-10-21
 Sr. EstimatorHouston, TXonsite2026-07-31
 Sr. Piping DesignerHouston, TXonsite2026-10-12
 Sr. Site Development EngineerSan Francisco, CAonsite$150,000-200,0002026-04-03
 Sr./Staff ArchitectSan Francisco, CA; Houston, TXonsite$130,000-200,0002026-09-18
 Sr/Staff Civil EngineerSan Francisco, CA; Houston, TXonsite$150,000-200,0002026-09-30
 Staff Piping EngineerSan Francisco, CA; Houston, TXonsite$170,000-210,0002026-04-17
Software Development
 Engineering Manager, MarianaOSSan Francisco, CAonsite$180-2252026-10-06
 Full Stack Software EngineerSan Francisco, CA; Ann Arbor, MI; Houston, TXonsite$80,000-160,0002026-08-31
 Machine Learning EngineerSan Francisco, CA; Ann Arbor, MI; Houston, TXonsite$120,000-180,0002026-06-10
 Machine Learning Engineer (Autonomy)San Francisco, CA; Ann Arbor, MI; Houston, TXonsite$140,000-180,0002026-08-21
 Senior Full Stack Software EngineerSan Francisco, CA; Ann Arbor, MI; Houston, TX; Moab, UTonsite$150,000-220,0002025-10-07
 Sr. Data EngineerSan Francisco, CA; Ann Arbor, MI; Houston, TXonsite$140,000-200,0002026-06-10
 Sr. Data ScientistSan Francisco, CA; Ann Arbor, MI; Houston, TXonsite$140,000-173,0002026-09-23
 Sr. Software Engineer, AutonomySan Francisco, CA; Ann Arbor, MI; Houston, TXonsite$140,000-200,0002026-10-06
 Sr. Software Engineer, InfrastructureSan Francisco, CA; Ann Arbor, MI; Houston, TXonsite$140,000-200,0002026-10-05
 Sr./Staff Process Controls EngineerSan Francisco, CA; Ann Arbor, MI; Houston, TX; Moab, UTonsite$150,000-200,0002026-09-16
 Staff Instrumentation and Controls EngineerSan Francisco, CA; Ann Arbor, MI; Houston, TX; Moab, UTonsite$150,000-200,0002026-11-09
 Staff Machine Learning EngineerAnn Arbor, MIonsite$160,000-240,0002026-06-10
 Staff Machine Learning Engineer (Autonomy)San Francisco, CA; Ann Arbor, MI; Houston, TXonsite$160,000-200,0002026-06-26
 Staff Process Controls EngineerSan Francisco, CA; Ann Arbor, MI; Houston, TX; Moab, UTonsite$150,000-200,0002026-09-04
Special Projects
 Member of the Special Projects StaffSan Francisco, CAonsite$170,000-185,0002026-09-30
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