Mechanical Engineer at Blue Water Autonomy – Lexington, Massachusetts

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 SummaryWe are seeking a Mechanical Engineer to design, build, and validate the core hardware systems that enable highly reliable autonomy systems at sea.

ResponsibilitiesDevelop system- and component-level requirements to ensure performance, safety, and reliability in harsh environments. Design, analyze, and test mechanical and fluid systems for autonomous maritime platforms. Build prototypes and support rapid iteration cycles from clean-sheet design through testing and deployment. Collaborate with cross-functional teams to integrate propulsion, mechanisms, and hardware systems. Conduct trade studies, tolerance analyses, and risk assessments to guide design decisions. Manage suppliers and fabrication partners to deliver components on time and on spec. Support system-level validation, field integration, and troubleshooting. Contribute to process improvements that enable faster development and more reliable hardware. QualificationsHave 3–7 years of mechanical engineering experience in aerospace, defense, robotics, or other complex hardware systems. Bring expertise in mechanical design, fluid systems, and thermal/dynamic environments Comfortable working hands-on with prototypes, test setups, and operational hardware. Excel at collaborating across engineering disciplines and leading integration efforts. Communicate clearly, balance speed with rigor, and take ownership from concept through delivery. Energized by solving practical engineering challenges in fast-moving, mission-driven environments. What We OfferIncredibly high-caliber teammates. You’ll work directly with our co-founders Rylan, Scott, and Austin. A fast-paced, creative working environment that offers a lot of room for ownership and growth.Opportunity to join a meaningful mission that protects American and our Democracy.Salary Range: $90,000-$150,000 annual base salary Startup equity optionsGenerous PTO, medical, dental, and vision coverage.Final compensation will depend on experience and skill levelWe are an equal opportunity employer. All hiring is contingent on eligibility to work in the United States. We are unable to sponsor or transfer visas for applicants.