Who We Are 

We are an early-stage, maritime defense technology startup backed by top tier investors. Our team is designing and building autonomous and highly producible ships that can serve multiple missions on the open ocean. 

Role Summary 

We’re seeking a Senior Mechanical Engineer – Fluid Systems & Components to lead the design, build, and deployment of critical systems for our autonomous naval vessels. You’ll own complete fluid systems—fuel, cooling, hydraulic, and lubrication—from concept through sea trials. 

You’ll design robust systems that perform in harsh ocean environments, collaborate with suppliers, and work alongside our fabrication and test teams to install, commission, and validate systems in the field. 

What You’ll Do 

• Design and integrate complete marine fluid systems, including fuel, cooling, hydraulics, and lubrication. 

• Perform system sizing, pressure drop, and heat transfer calculations. 

• Create P&IDs, 3D CAD layouts, and detailed manufacturing drawings. 

• Specify pumps, valves, filters, and heat exchangers for performance, reliability, and cost. 

• Collaborate with suppliers on component selection, RFQs, and technical evaluations. 

• Oversee installation, commissioning, and troubleshooting of systems on prototype vessels. 

• Conduct functional and performance testing (flow, pressure, leak, endurance). 

• Integrate sensors and automation for autonomous operation and monitoring. 

• Work cross-functionally with power generation, electrical, and software teams. 

• Drive design improvements, lessons learned, and documentation updates for production. 

Who You Are:  

• Bring 4–5+ years of experience designing fluid systems (fuel, cooling, hydraulic, or similar). 

• Are proficient in fluid mechanics, pressure drop, and thermal calculations. 

• Have strong CAD skills (Onshape preferred) and can create clear P&IDs and 3D layouts. 

• Understand pumps, valves, filters, and heat exchangers at a deep component level. 

• Are comfortable working hands-on with installations, fabrication, and field testing. 

• Have experience managing suppliers and technical sourcing decisions. 

• Thrive in a fast-paced startup setting with a bias for action and ownership. 

• Hold a B.S. in Mechanical Engineering or related field. 

Nice to haves: 

• Have marine or defense experience (shipbuilding, propulsion, or hydraulic systems). 

• Bring FEA or DFMEA experience for structural and reliability analysis. 

• Have worked directly with pump or valve manufacturers. 

• Enjoy blending analytical rigor with practical, field-based execution. 

What We Offer 

• Incredibly high-caliber teammates—you’ll work directly with our co-founders and technical leads. 

• A mission-driven environment designing technology that protects American lives and democracy. 

• Significant ownership and the ability to shape our fluid systems design approach. 

• Competitive compensation, equity, PTO, and comprehensive medical and dental coverage. 

• A fast-paced, creative culture that values clarity, teamwork, and decisive execution. 

• Equal opportunity employer. All hiring is contingent on eligibility to work in the U.S.; we are unable to sponsor or transfer visas.