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Salary: USD 150,000 - 180,000 / annual
Arc is electrifying the marine industry by rethinking powertrains, software, and vessel designs from first principles. The company has proven core technology, is scaling production of its flagship consumer model, and is now extending its platform to commercial applications including tugs, ferries, and defense vessels with signed contracts and a robust pipeline.
As Senior Mechanical Engineer, you will own the design and integration of complex electromechanical systems across the full vehicle lifecycle—from early concept and requirements through prototyping, validation, sea trials, and production. You'll work across mechanical, electrical, thermal, and manufacturing domains, understanding how assemblies, subsystems, and components interact as part of an integrated vessel.
Key responsibilities include:
- Driving requirements definition, specifications, CAD design, hands-on prototyping, analysis (FEA, numerical modeling, hand calculations), validation, and production support
- Designing with manufacturability, serviceability, reliability, and real-world operating conditions in mind
- Building, testing, troubleshooting, and iterating on hardware in fast-moving development environments
- Supporting sea trials and in-field validation to verify system performance and resolve real-world issues
- Working closely with component suppliers, partner shipyards, manufacturing teams, and vessel operators to drive execution
- Traveling occasionally (~15%) to support testing, validation, suppliers, and field operations
Minimum qualifications: 4+ years owning complete mechanical or electromechanical systems from design through production; strong fundamentals in structural and thermal engineering; functional knowledge of electrical systems including high-voltage battery systems and power electronics; experience designing large assemblies or complex multidisciplinary systems; proficiency with CAD (NX, CATIA, SolidWorks) and analysis tools (MATLAB, Simulink, FEA); strong intuition for manufacturing methods and design-for-manufacturability; practical hardware debugging experience; ability to move quickly in ambiguous environments; clear communication skills; comfortable working hands-on in the field including on boats and at shipyards.
Bonus qualifications include experience with commercial vessels or marine systems, Coast Guard and ABS regulations, high-voltage battery systems, sheet metal manufacturing, CNC machining, composites, fluid system design, detailed engineering drawings with GD&T fundamentals, and enthusiasm for boating and marine systems.
This is a full-time, on-site role at Arc's Los Angeles headquarters reporting to the Manager of Mechanical Systems Engineering.
