About Endurance

Endurance is building the worlds 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 and Robinhood. We have completed multiple deep-ocean deployments 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 both environmental impact and cost.

What youll be doing

Endurance is developing fully custom turbomachinery heat exchangers and process piping for our 2MW and 10MW sCO2 generators. This role owns our turbomachinery both technically and organizationally. As Director of Turbomachinery you will set the technical direction for turbine and pump development across the full product lifecycle: from thermodynamic cycle integration and aero-thermal design through manufacturing and test to long-duration operation on the seafloor. You will build and lead the turbomachinery team and your decisions will directly shape the performance reliability and cost of our core power conversion hardware.

Key Responsibilities

• Set Technical Direction: Define the aero-thermal design philosophy and architecture for turbines and pumps across all power generation cycles making final calls on design tradeoffs at the system level.

• Lead the Team: Hire develop and manage a team of turbomachinery engineers. Foster a culture of rigorous first-principles engineering paired with a strong bias toward hardware.

• Own the Program: Drive turbomachinery development from early-stage sizing and trade studies through detailed design validation and subsea deployment holding accountability for schedule performance and reliability.

• Design Through Test: Personally lead critical design work from 1D sizing and CFD analysis to mechanical integration of rotors housings bearings and seals and see it through to hardware assembly and test validation.

• Govern Simulation and Analysis: Set standards for 3D CFD and structural FEA across the team ensuring analytical rigor and model correlation with experimental data.

• Define the Test Strategy: Own the overall validation approach for rotating equipment from bench-level component tests through full system operation. Ensure failure modes are identified and resolved before deployment.

• Drive Cross-Functional Integration: Partner with systems thermal mechanical and operations teams to ensure turbomachinery fits within the broader power plant architecture and field constraints.

• Build for Scale: Establish the internal tools design standards and documentation frameworks that allow the turbomachinery function and the product line to grow.

Required Qualifications

• Bachelors degree in Mechanical or Aerospace Engineering (Masters or PhD preferred).

• 10 years of experience in the design analysis and testing of high speed rotating machinery (pumps compressors or turbines).

• Strong fundamentals in thermodynamics fluid mechanics and heat transfer.

• Experience with CAD software (e.g. Siemens NX) and rapid prototyping.

• Ability to thrive in a fast-paced scrappy startup environment.

Preferred Qualifications

• Experience with turbomachinery design tools such as AxStream CFTurbo etc.

• Proficiency in CFD and numerical simulation tools (e.g. ANSYS CFX/Fluent OpenFOAM or Numeca).

• Experience with supercritical CO2 or organic Rankine cycle (ORC) turbomachinery.

• Knowledge of high-pressure seal design and rotor dynamics.

• Hands-on experience setting up and operating high-speed rotating equipment test rigs.

• Programming skills (Python MATLAB or C) for automated design optimization and data analysis.

Benefits & Perks

• Global Fieldwork: Travel to fascinating deployment sites along oceanic ridges in locations like the Pacific Northwest Hawaii Iceland Japan New Zealand and the Azores

• Hands-on Experience: Participate in sea trials and deployment operations in partnership with leading oceanographic institutions

• Cutting-edge Development: Work with technology that spans high-power electronics marine systems and clean energy

• Impactful Work: Help solve one of the worlds most pressing challenges

• Competitive Compensation: Comprehensive salary and equity packages

• Benefits: Vision Dental Health insurance coverage

• Dive Certification: Company-sponsored recreational dive certification

Required Experience:

Director