ABOUT ENDURANCE
Endurance is building the world's first modular subsea geothermal power plants, converting vast thermal resources under the ocean into gigawatts of baseload power. Backed by Founders Fund, Felicis, First Round Capital, and Point72 Ventures, our founding team includes veterans from SpaceX, Helion, Blue Origin, and Apple. We have completed multiple deep-ocean deployments to subsea volcanoes and are launching a long-term demonstration project this fall. By leveraging modular design, manufacturing scale, efficient drilling, and latent cooling on the seafloor, we are pioneering a new category of energy that outperforms traditional sources on environmental impact, deployment speed, and cost.
The Role
The primary structure is the plant. It carries the hot loop, the power electronics, and the connection to the well; it survives the lift, the splash zone, the transit, and the landing on an active hydrothermal field 1-3 km down; and then it stays there for years in seawater at 100-300 bar. We design, build, test, and deploy it.
In this role you will focus on the plant's load-bearing hardware: frames and skids, foundations and seafloor landing systems, lifting and deployment hardware, mooring and anchoring interfaces, and the pressure housings and pressure-tolerant structures that mount to the frame. You will share that scope with a few other engineers, and specific structures will be yours end to end. We avoid pressure vessels where we can through compensated and pressure-tolerant design, but where we cannot, you will design and analyze them. We use ASME, DNV, and API as references and build our own qualification basis through test.
Your First Year
Help deliver the primary structure for our first commercial system, the first subsea geothermal plant to put power on a grid: designed, analyzed, built, qualified, lifted, and landed on the seafloor. The load cases and qualification basis you help establish carry forward to every plant that follows.
How We Work
Our mechanical engineering team is a small group of senior and principal engineers who split the plant's hardware between them. Each engineer owns their hardware end to end: requirements, design, drawings, build, test, and deployment. Principal engineers own the plant architecture, and you will be part of those decisions. We are looking for people who have built hardware, debugged it in the lab or the field, and want to own the result.
Responsibilities
• Own specific elements of the primary structure end to end: frames, foundations and landing systems, lifting and deployment hardware, or pressure housings
• Define structural load cases from first principles: lift through the splash zone, transit, landing on irregular seafloor, thermal expansion of the hot loop, hydrodynamic loads, and long-duration fatigue and corrosion
• Size structures with hand calculations, then prove them with FEA: static, fatigue, buckling, external-pressure collapse, and thermal
• Design pressure-tolerant and pressure-compensated structures where possible; design and analyze pressure housings where required
• Design lifting, rigging, deployment, and recovery hardware and the interfaces to vessels, cranes, and ROVs
• Select materials and corrosion strategies for multi-year seawater exposure: cathodic protection, coatings, galvanic isolation, titanium, duplex stainless, and composites
• Own weld design and fabrication for your structures and work directly with fabricators on procedures, inspection, and tolerances
• Build and test development articles, then qualify full structures: hydrostatic, external-pressure, fatigue, and thermal cycling
• Lead root-cause investigations on structural and housing failures and implement corrective actions
• Define interfaces with the fluid components, electromechanical hardware, and well connection owned by your peers
• Contribute to plant-level architecture decisions alongside our principal engineers
• Create detailed 3D CAD models, drawings, and tolerance stacks…