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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 for Powertrain Engineering, 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. This is a full-time, on-site role reporting to the Manager of Powertrain Hardware Engineering at Arc's Los Angeles headquarters.
Key responsibilities include:
- Owning design and integration of complex electromechanical systems from concept through production
- Working across mechanical, electrical, thermal, and manufacturing domains to understand how assemblies, subsystems, and components interact as part of an integrated vehicle
- 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
- Working closely with component suppliers, partner shipyards, manufacturing teams, and vessel operators to drive execution
- Supporting sea trials and in-field validation to verify system performance and resolve real-world issues
- Occasional travel (~15%) to support testing, validation, suppliers, and field operations
Requirements:
- Bachelor's degree in Mechanical Engineering or related Engineering field
- 5+ years of experience owning complete mechanical or electromechanical systems, including large assemblies or complex multidisciplinary systems, from initial design through production
- Functional knowledge of electrical systems, including high-voltage battery systems and power electronics
- Strong fundamentals in structural and thermal engineering
- Experience with CAD software such as NX, CATIA, or SolidWorks
- Experience with analysis and modeling tools such as MATLAB, Simulink, or FEA packages
- Strong intuition for manufacturing methods and design-for-manufacturability (DFM) principles
- Practical experience designing, building, debugging, and troubleshooting hardware in production or prototype environments
- Ability to move quickly and make sound engineering decisions in ambiguous environments
- Clear written and verbal communication skills
- Strong time management and prioritization skills
- Comfortable working hands-on in the field, including on boats and at shipyards
Bonus qualifications:
- Experience working on commercial vessels or marine systems, including familiarity with Coast Guard and ABS regulations
- Experience with fluid system design, including pump sizing, heat exchanger sizing, and hose/pipe routing
- Deep experience with high-voltage battery system design or integration
- Exposure to sheet metal manufacturing, CNC machining, composites, or shop tools
- Experience creating detailed engineering drawings with strong GD&T fundamentals
- Comfortable pushing at a fast but sustainable pace
- Enthusiasm for boating, marine systems, and the water
