Mechanical Engineer, Marine Systems About OceanusOceanus Maritime Technologies is building the operating platform for the modern maritime world.Global trade runs on ships, and we’re redefining what’s possible at sea by leveraging modern technology.We’re a small, hands-on team based in El Segundo building full-stack systems that perform in real operating conditions across vessels, ports, and fleets. We focus on practical, deployable technology that brings safety oversight, automation, and coordination to complex maritime environments.Our founding team previously built and operated SpaceX’s Autonomous Spaceport Droneships, which are among the most advanced autonomous maritime systems ever deployed. Today, we work with leading U.S. operators to bring that same rigor and systems thinking to the next generation of maritime infrastructure.About the RoleAs a Mechanical Engineer, you will own how Oceanus hardware comes together on the vessel including architecture, integration, and test. You will be responsible for the mechanical and electrical integration of our onboard systems cradle to production: defining how sensors, compute, power, and cabling are packaged, mounted, routed, and powered on the boat; coordinating across mechanical, electrical, and software teams to make those subsystems play together; and running the structured test campaigns that prove they hold up to the marine environment.This is a hands-on, full-lifecycle role at the intersection of mechanical, electrical, and marine engineering. Expect to spend time at our El Segundo test facility; in shipyards installing and commissioning systems aboard vessels; and underway during sea trials, instrument in hand, validating that what we built works the way we said it would.Key ResponsibilitiesOwn onboard systems integration from concept to production, including sensor installs, equipment enclosures, electrical panels, power distribution, and cable harnesses for Oceanus systems deployed on operating vesselsDefine and document system-level architecture for onboard installations: interface control documents, electrical block diagrams, mechanical layouts, and integration proceduresLead the mechanical and electrical integration of multi-vendor subsystems (sensors, compute, power, networking), including cable routing, harness design, grounding and bonding, and EMI and thermal managementDevelop and execute structured test campaigns bench, dockside, and underway and qualify hardware for shock, vibration, and thermal performance representative of vessel serviceOwn the field deployment lifecycle: site surveys aboard customer vessels, install design, testing, on-board installation and commissioning, sea trials, and operator handoffDrive root-cause analysis when systems behave unexpectedly in the field, provide direct technical support to vessel crews, and feed findings back into design, drawings, and proceduresPartner with software, electrical, and mechanical engineers to set integration standards and tooling that make every successive install faster, more repeatable, and more reliableMinimum QualificationsBachelor's degree or higher in Marine Engineering, Naval Architecture, Mechanical Engineering, Electrical Engineering, or a related discipline4+ years designing, integrating, and testing complex mechanical and electrical systems in real operating environments (maritime, aerospace, defense, automotive, energy, or heavy industrial)Demonstrated track record of owning hardware cradle to production from concept and analysis, through detail design and integration, through structured test and into sustained field operationStrong proficiency with 3D CAD (SolidWorks, NX, Creo, or equivalent), GD&T, tolerance stack-ups, and detailed assembly and installation drawingsExperience developing and executing structured test plans (environmental, vibration, ingress, functional), analyzing test data to drive design changes, and supporting prototype build and installation alongside technicians and tradesWillingness to travel to vessels, shipyards, and operator sites (~25% expected, with periods of more during major deployments)Preferred Skills and ExperienceDirect experience with maritime systems, offshore operations, commercial workboat / merchant marine programsFamiliarity with vessel mechanical and electrical systems, propulsion and auxiliary, switchboards, generators, fuel and fluid systems, deck machinery at the level of being able to design integrations that respect themExperience with FEA, CFD, or other modeling and simulation tools used to characterize and validate mechanical or electrical system performanceComfort with low-voltage DC and AC marine power, harness fabrication, terminations, and basic instrumentation workSea time, USCG credentials, professional mariner background, or other direct vessel operations experienceComfort working alongside captains, crew, port engineers, and shipyard personnel — and translating their feedback into engineering actionWork EnvironmentOn-site with the team at our office in El Segundo, CAOccasional travel to test sites or operator locations as neededCompensation and BenefitsWe are open to a wide range of experience levels. The expected salary range for this role is $130,000 - $210,000. Final compensation will be determined based on experience, skills, and scope of the role. We offer a comprehensive benefits package that includes:Comprehensive medical, dental, and vision coverageGenerous Equity participationFully stocked kitchen and catered lunch every dayOnsite EV chargingFlex Paid time off and company holidays401(k) traditional and roth optionsAdditional benefits that support your health, growth, and well-beingWhy Oceanus, Why NowMaritime operations are at the edge of a revolution. New connectivity and compute are finally unlocking remote monitoring, autonomy, and digitization.Regulatory, economic, and geopolitical pressure is accelerating technology adoption, and U.S.-aligned infrastructure is more valuable than ever.