Developing a new generation of electrolytic technology for making carbon neutral magnesium metal from seawater and brines for the era of electrification and decarbonization.

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Innovative tech for carbon-neutral magnesium from seawater, advancing electrification and decarbonization.

Senior Research EngineerOakland, CA About MagratheaBased in Oakland, California, Magrathea is a global category leader in critical mineral production technology. Our mission is to rebuild the magnesium metal supply base, delivering secure access to one of the most critical materials on Earth. Magnesium is essential to the aluminum, steel, titanium, nuclear, defense, and aerospace industries but 95% of global supply comes from China where large amounts of coal are used to make metal. This isn’t just an economic risk: it’s a national security threat, and Magrathea is fixing it. We’ve developed a next-generation electrolytic process to make magnesium metal from seawater and brines, unlocking a new path to industrial independence and to a cleaner environment for future generations. We’re backed by the earliest believers in Tesla and SpaceX, major European industrial families, and the U.S. Department of Defense. If you’re ready to make a lasting real-world impact, let's talk. Is Magrathea For Me?You’ll be joining a high-performance team of builders on a mission to stand up the first major electrolytic magnesium smelter this century. We’re doing it this decade. There are no pointless positions here, no layers of middle management, no meetings about meetings: just a hyper focus on execution. You’ll be hands-on from day one, shaping the core of a technology that will have major impacts on national security, clean technology, and industrial resilience. If you’re the kind of person who runs toward hard problems, thrives under pressure, and wants to build something history will remember you for, this role is for you. Ideal Background<ul><li>8+ years of experience with inorganic chemistry and pilot plant operations</li><li>BS, MS, or PhD in chemistry, chemical engineering, process engineering or related field</li><li>Experience in experimental design and development of molten salt systems or other complex process technology</li></ul> Compensation<ul><li>Salary range: $120,000-$200,000 annually, commensurate with experience</li><li>Equity, stock options, and/or milestone-based compensation</li><li>Health, dental, and vision insurance</li><li>401k from day 1 with pre-tax and post-tax investing options</li></ul> Role Expectations<ul><li>Lead design and execution of experiments on Magrathea's molten salt electrolyzer to optimize electrolysis performance, efficiency, and scalability</li><li>Lead hands-on testing, troubleshooting, and improvements in electrolyzer design, materials, and operating conditions to determine solutions for tough problems at both the pilot and bench scale</li><li>Collect, analyze, and interpret experimental data to establish conclusions and recommendations</li><li>Perform engineering design calculations for heat flux, heat flow, understand and utilization electrochemical measurements such as polarization curves, vaporization rates, and other physical parameters</li><li>Design, prototype and procure/fabricate experimental rigs up to 1 cubic meter in size</li><li>Operate and lead investigations on mini-pilot and larger pilot plant equipment and deploy modifications where useful</li><li>Ensure all research activities adhere to safety protocols and regulatory standards</li><li>Able to anticipate potential issues and make important decisions within ambiguity</li><li>Thrive in fast-paced, high-accountability environments and take pride in being the person others rely on to get the job done</li><li>You don't wait to be told what to do: you see problems, solve them, and move on to the next one</li></ul> Location<ul><li>Full-time in-person at our Oakland, California facilities</li><li>Magrathea sponsors visas for candidates from Canada, Mexico, Australia, and New Zealand</li></ul>

Senior Research Engineer

Senior Operations ManagerOakland, CA About MagratheaBased in Oakland, California, Magrathea is a global category leader in critical mineral production technology. Our mission is to rebuild the magnesium metal supply base, delivering secure access to one of the most critical materials on Earth. Magnesium is essential to the aluminum, steel, titanium, nuclear, defense, and aerospace industries but 95% of global supply comes from China where large amounts of coal are used to make metal. This isn’t just an economic risk: it’s a national security threat, and Magrathea is fixing it. We’ve developed a next-generation electrolytic process to make magnesium metal from seawater and brines, unlocking a new path to industrial independence and to a cleaner environment for future generations. We’re backed by the earliest believers in Tesla and SpaceX, major European industrial families, and the U.S. Department of Defense. If you’re ready to make a lasting real-world impact, let's talk. Is Magrathea For Me?You’ll be joining a high-performance team of builders on a mission to stand up the first major electrolytic magnesium smelter this century. We’re doing it this decade. There are no pointless positions here, no layers of middle management, no meetings about meetings: just a hyper focus on execution. You’ll be hands-on from day one, shaping the core of a technology that will have major impacts on national security, clean technology, and industrial resilience. If you’re the kind of person who runs toward hard problems, thrives under pressure, and wants to build something history will remember you for, this role is for you. Ideal Background<ul><li>10+ years of experience in a facilities or operations management role within a manufacturing, lab, hardtech startup, or industrial environment</li><li>Deep working knowledge of building systems (HVAC, electrical, plumbing, construction) and industrial hygiene and safety practices</li><li>Hands-on, resourceful, and comfortable working in a dynamic, startup environment</li><li>Familiarity with EH&amp;S regulations and site compliance programs (OSHA, EPA, local fire codes)</li><li>Strong communication and coordination skills including ability to interface effectively with cross-functional teams and external contractors and suppliers</li><li>Ability to prioritize, triage, and problem-solve in real time with minimal supervision</li><li>Preferred: technical degree or certification in an industry-related field (engineering, construction management, industrial tech)</li></ul> Compensation<ul><li>Salary range: $80,000-$120,000 annually, commensurate with experience</li><li>Equity, stock options, and/or milestone-based compensation</li><li>Health, dental, and vision insurance</li><li>401k from day 1 with pre-tax and post-tax investing options</li></ul> Role Expectations<ul><li>Reports directly to our COO</li><li>Own preventive maintenance schedules and troubleshoot mechanical, electrical, or plumbing issues across pilot-scale equipment and facilities infrastructure</li><li>Lead day-to-day management of contractors and vendors for HVAC, electrical, plumbing, fire systems, janitorial, security, and waste disposal services</li><li>Help manage hazardous materials storage, labeling, and disposal in compliance with local and federal regulations</li><li>Implement and enforce site-wide safety protocols and EH&amp;S best practices in collaboration with our COO and other team members</li><li>Track and manage facilities-related spend, including consumables, utilities, equipment maintenance, and repair budgets</li><li>Maintain accurate documentation for equipment, inspections, certifications, and standard operating procedures</li><li>Support facilities build-outs, reconfigurations, and installation of new pilot systems in partnership with engineering</li><li>Serve as the on-the-ground first responder for operational emergencies or critical system downtime</li><li>Coordinate space planning, signage, physical access, and logistics for internal moves, events, and audits</li><li>Able to anticipate potential issues and make important decisions within ambiguity</li><li>Thrive in fast-paced, high-accountability environments and take pride in being the person others rely on to get the job done</li><li>You don't wait to be told what to do: you see problems, solve them, and move on to the next one</li></ul> Location<ul><li>Full-time in-person at our Oakland, California facilities</li><li>Magrathea sponsors visas for candidates from Canada, Mexico, Australia, and New Zealand</li></ul>

Senior Operations Manager

Chief Operating OfficerOakland, CA About MagratheaBased in Oakland, California, Magrathea is a global category leader in critical mineral production technology. Our mission is to rebuild the magnesium metal supply base, delivering secure access to one of the most critical materials on Earth. Magnesium is essential to the aluminum, steel, titanium, nuclear, defense, and aerospace industries but 95% of global supply comes from China where large amounts of coal are used to make metal. This isn’t just an economic risk: it’s a national security threat, and Magrathea is fixing it. We’ve developed a next-generation electrolytic process to make magnesium metal from seawater and brines, unlocking a new path to industrial independence and to a cleaner environment for future generations. We’re backed by the earliest believers in Tesla and SpaceX, major European industrial families, and the U.S. Department of Defense. If you’re ready to make a lasting real-world impact, let's talk. Is Magrathea For Me?You’ll be joining a high-performance team of builders on a mission to stand up the first major electrolytic magnesium smelter this century. We’re doing it this decade. There are no pointless positions here, no layers of middle management, no meetings about meetings: just a hyper focus on execution. You’ll be hands-on from day one, shaping the core of a technology that will have major impacts on national security, clean technology, and industrial resilience. If you’re the kind of person who runs toward hard problems, thrives under pressure, and wants to build something history will remember you for, this role is for you. Ideal Background<ul><li>BS, MS, or PhD in chemical, mechanical, industrial engineering, or a related field</li><li>10+ years of experience operating in a variety of industrial settings including engineering, design, chemical plant construction, and operations-focused roles</li><li>Experience developing and communicating process design packages with engineering companies and other important project delivery partners</li><li>Strong competence in inorganic chemistry, equipment fabrication, equipment maintenance, process development, vendor communication, industrial hygiene, and project execution</li></ul> Compensation<ul><li>Salary range: $160,000-$280,000 annually, commensurate with experience</li><li>Equity, stock options, and/or milestone-based compensation</li><li>Health, dental, and vision insurance</li><li>401k from day 1 with pre-tax and post-tax investing options</li></ul> Role Expectations<ul><li>Key thought partner to the CEO for how the company is run</li><li>Own the execution of Magrathea’s commercial scale-up - translating ambition into concrete outcomes by orchestrating cross-functional engineering, fabrication, and construction teams</li><li>Lead multidisciplinary project teams and external partners through aggressive design-build timelines to deliver the first major electrolytic magnesium plant in a generation</li><li>Build, mentor, and hold accountable a team of A-players who can operate under pressure and take ownership of outcomes</li><li>Manage relationships with EPC firms, engineering partners, vendors, and contractors - ensuring everyone is aligned, moving fast, and delivering to spec</li><li>Coordinate the development of integrated process design packages (PFDs, P&amp;IDs, plot plans, control systems, etc.) and drive them through fabrication, commissioning, and operation</li><li>Oversee long-lead equipment planning, vendor negotiations, and installation sequencing to keep megaproject timelines on track</li><li>Instill operational discipline across the company - standing up world-class systems for safety, quality, and throughput from day one</li><li>Operate with urgency and decisiveness. We’re not optimizing: we’re building something that’s never existed, and you are the builder-in-chief</li><li>You set the tone - decisive, high-integrity, low-ego. You take full responsibility for execution and you bring people with you</li><li>Able to anticipate potential issues and make important decisions within ambiguity</li><li>Thrive in fast-paced, high-accountability environments and take pride in being the person others rely on to get the job done</li><li>You don't wait to be told what to do: you see problems, solve them, and move on to the next one</li></ul> Location<ul><li>Full-time in-person at our Oakland, California facilities</li><li>Magrathea sponsors visas for candidates from Canada, Mexico, Australia, and New Zealand</li></ul>

Chief Operating Officer (COO)

Staff Process EngineerOakland, CA or Remote/Commuting About MagratheaBased in Oakland, California, Magrathea is a global category leader in critical mineral production technology. Our mission is to rebuild the magnesium metal supply base, delivering secure access to one of the most critical materials on Earth. Magnesium is essential to the aluminum, steel, titanium, nuclear, defense, and aerospace industries but 95% of global supply comes from China where large amounts of coal are used to make metal. This isn’t just an economic risk: it’s a national security threat, and Magrathea is fixing it. We’ve developed a next-generation electrolytic process to make magnesium metal from seawater and brines, unlocking a new path to industrial independence and to a cleaner environment for future generations. We’re backed by the earliest believers in Tesla and SpaceX, major European industrial families, and the U.S. Department of Defense. If you’re ready to make a lasting real-world impact, let's talk. Is Magrathea for me?You’ll be joining a high-performance team of builders on a mission to stand up the first major electrolytic magnesium smelter this century. We’re doing it this decade. There are no pointless positions here, no layers of middle management, no meetings about meetings: just a hyper focus on execution. You’ll be hands-on from day one, shaping the core of a technology that will have major impacts on national security, clean technology, and industrial resilience. If you’re the kind of person who runs toward hard problems, thrives under pressure, and wants to build something history will remember you for, this role is for you. Ideal Background<ul><li>BS or MS in chemical, mechanical, or industrial engineering, or a related field</li><li>10+ years of experience operating in a variety of real industrial settings including engineering, design, chemical plant construction, and operations-focused roles</li><li>Experience developing and communicating process design packages with engineering companies and other important project delivery partners, ideally for first-of-a-kind projects</li><li>Strong competence in inorganic chemistry, equipment fabrication, equipment maintenance, process development, vendor communication, industrial hygiene, and project execution</li><li>Understanding of the regulatory landscape and permitting processes associated with large-scale chemical plants</li><li>Expertise in managing EPC contracts and external construction contractors</li><li>Skilled in schedule management, risk management, and project execution</li><li>Experience in chemicals, metals, aluminum, chlor-alkali, and/or power infrastructure industries preferred</li></ul> Compensation<ul><li>Salary range: $160,000-$240,000 annually, commensurate with experience</li><li>Equity, stock options, and/or milestone-based compensation</li><li>Health, dental, and vision insurance</li><li>401k from day 1 with pre-tax and post-tax investing options</li></ul> Role Expectations<ul><li>Support in leading scale-up and design of Magrathea’s technology to commercial scale quickly, economically, and safely</li><li>Responsible for translating pilot and lab-scale results into process design packages for EPC partners</li><li>Apply problem solving skills and design experience to hydrometallurgy, solids handling, drying, electrolysis, molten salt processing, refractory materials, gas handling, foundry and pyrometallurgy applications</li><li>Contribute to engineering work products for overall process and unit operations including design basis, PFD, P&amp;ID, MFD, plot plans, process control narratives, HAZOP, and model reviews</li><li>Manage innovative custom equipment fabrication and installation with third party manufacturing partners</li><li>Identify opportunities for process optimization, cost savings, and enhanced safety and environmental performance</li><li>Able to anticipate potential issues and make important decisions within ambiguity</li><li>Thrive in fast-paced, high-accountability environments and take pride in being the person others rely on to get the job done</li><li>You don't wait to be told what to do: you see problems, solve them, and move on to the next one</li></ul> Location<ul><li>Ideally full-time in-person at our Oakland, California facilities</li><li>We are open to remote work, with one week per month commuting to Oakland for superstars located within 6 hours of transit from the San Francisco Bay Area</li><li>Magrathea sponsors visas for candidates from Canada, Mexico, Australia, and New Zealand</li></ul>

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