Senior Mechanical Engineer (Electromechanical)

Endurance Energy•Seattle, WA

5d•$170,000 - $230,000

About The Position

Endurance is seeking a Senior Mechanical Engineer to design and deliver electromechanical hardware for modular subsea geothermal power plants. The role focuses on hardware where electricity, fluid, and pressure meet, including electronics cooling and thermal management; pressure-compensated, fluid-filled packaging for high-power electronics; busswork and electrical interfaces; wet-mate and dry-mate connectors; and subsea actuators, motors, pumps, mechanisms, seals, and magnetic couplings. The engineer will share this scope with other engineers while owning specific hardware end to end, working most closely with power electronics engineers and contributing to plant-level architecture decisions with principal engineers. The first-year objective is to help deliver the electromechanical hardware for Endurance’s first commercial system, including cooled and pressure-compensated electronics packaging, power busswork and connectors, and actuators designed, built, qualified, and operating on the seafloor. Engineers own requirements, design, drawings, builds, tests, and deployment, and are expected to have hands-on hardware experience and take responsibility for results.

Requirements

Bachelor's degree in mechanical engineering, electrical engineering, or a related engineering discipline.
At least 6 years of professional experience designing electromechanical hardware such as connectors, actuators, mechanisms, or electronics packaging for demanding environments.
Ownership of at least one electromechanical component from concept through qualification and fielded use.

Nice To Haves

Experience designing subsea electrical connectors, penetrators, busswork, or actuators, or equivalent experience with spacecraft mechanisms, downhole tools, or power electronics packaging for aerospace or automotive.
Hands-on experience with dielectric fluids, pressure compensation, and sealing high voltage against seawater.
Experience with dynamic and rotating seals, magnetic couplings, and mechanism failure modes in long-duration service.
Experience with thermal management of power electronics, including liquid- or immersion-cooled systems.
Working knowledge of high-voltage design and testing, including creepage and clearance, insulation resistance, and partial discharge.
Experience sizing motors and actuators and integrating electronics into mechanical assemblies.
Experience at a small or fast-moving hardware organization, making engineering decisions with incomplete information and limited resources.
A track record of taking on increasing responsibility and delivering something difficult early in a career.
Experience on an engineering competition team such as Formula SAE, Baja SAE, RoboSub, or rocketry, or an equivalent self-directed hardware project.

Responsibilities

Own specific electromechanical hardware end to end, such as electronics cooling and enclosures, busswork and connectors, or actuators and mechanisms.
Design high-power electrical interfaces, including busswork, wet-mate and dry-mate connectors, contacts, insulators, dielectric sealing, and mate/demate mechanics.
Design subsea packaging for high-power electronics, including fluid-filled and pressure-compensated enclosures, dielectric fluid selection, penetrators, and feedthroughs.
Design electronics cooling and thermal management systems, including heat rejection from converter stacks through enclosures to seawater, cold plates, and immersion cooling.
Design subsea actuators, motors, pumps, and mechanisms, including dynamic and rotating seals, magnetic couplings, position feedback, and fail-safe behavior.
Translate electrical requirements such as voltage, current, creepage, and thermal requirements into mechanical designs in collaboration with power electronics engineers.
Design and build test setups for high voltage under hydrostatic pressure, insulation resistance, partial discharge, thermal performance, and long-duration immersion.
Lead root-cause investigations into connector, enclosure, and actuator failures and implement corrective actions.
Define interfaces with valves and primary structures owned by peers.
Work directly with machine shops, molders, and specialty suppliers on contacts, insulators, seals, and precision mechanisms.
Contribute to plant-level electrical architecture and packaging decisions alongside principal engineers.
Create detailed 3D CAD models, drawings, and tolerance stacks for electromechanical assemblies.

Benefits

Competitive base salary and equity for full-time employees.
Health insurance coverage.
Dental insurance coverage.
Vision insurance coverage.
Flexible PTO.
12 paid company holidays.
Travel to deployment sites along oceanic ridges.
Participation in sea trials and deployment operations with oceanographic institutions.
Company-sponsored recreational dive certification.
Access to the company boat.
Free meals and snacks.