Senior Mechanical Engineer

About the role

The marine industry supports recreation, global commerce, and national defense. Arc is rethinking powertrains, software, and vessel designs from first principles, and is already executing with a portfolio of signed contracts and a growing pipeline.

Responsibilities

• Owning the design and integration of complex electromechanical systems across the vehicle lifecycle, from concept through production
• Understanding how assemblies, subsystems, and components interact as part of a larger 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
• 4+ 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 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

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 (beyond general functional knowledge)
• Exposure to sheet metal manufacturing, CNC machining, composites, or shop tools
• Comfortable pushing at a fast but sustainable pace
• Enthusiasm for boating, marine systems, and the water

Skills

• Ownership over both your work and the company's success
• Empathy for colleagues and for customers
• Humility in problem solving and collaboration
• Pragmatism for navigating ambiguity quickly and sensibly

Benefits

• Base salary for this role is P3: $150,000 P4: $180,000 annually
• Highly competitive equity grants are included with full time offers
• Semi-annual bonuses tied to your impact, not just your tenure
• Top-tier benefits for full-time employees, including:
• Healthcare benefits — 99% employer-paid medical, dental, and vision
• Parental leave — 14 weeks fully paid for birthing and non-birthing parents
• Gross time off — Highly competitive PTO with an opportunity to earn more time with tenure
• Income protection — Life and disability insurance for all employees
• Retail retirement savings — Traditional and Roth 401(k) access
• Water fund — $500 for you to spend each year to get out on the water, however you choose
• Professional development — $500 annual reimbursement for professional development and a monthly AI stipend
• Safety support- Annual reimbursement for PPE, ergonomic equipment and anything that ensures we keep our crew safe
• Captain training — Training and access to take Arcboats out with friends and family
• Office perks — Daily lunches, snacks, and good coffee while onsite
• Relocation assistance — Available depending on role eligibility

Pay

The base salary for this role is P3: $150,000 P4: $180,000 annually.

Schedule

This is a full-time, on-site role at our Los Angeles headquarters.