Senior Mechanical Engineer

What we're building

The marine industry supports recreation, global commerce, and national defense. And yet it runs on technology that hasn't meaningfully changed in fifty years. Until now.

Arc is on a mission to electrify the marine industry. We're rethinking powertrains, software, and vessel designs from first principles. And we're already executing. We started with consumers to develop and harden our core technology. We're now scaling production of our flagship model with new models and sectors on the horizon. Now we're extending our platform to commercial applications, starting with tugs, ferries, and defense, with years worth of signed contracts and a pipeline that spans every vessel type on the water.

The technology is proven, the momentum is building, and the opportunity is enormous. The marine industry is going electric and Arc is building the platform that powers it.

Who we're looking for

Who We're Looking For

As Arc’s 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.

This is a full-time, on-site role at our Los Angeles headquarters reporting to our Manager, Mechanical Systems Engineering

What you'll do

Owning the design and integration of complex electromechanical systems across the vehicle lifecycle, from concept through production

Working across mechanical, electrical, thermal, and manufacturing domains

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

Traveling occasionally (~15%) to support testing, validation, suppliers, and field operations

Minimum Qualifications

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

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 (beyond general functional knowledge)

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

At Arc, we encourage diversity and consider all qualified applicants equally for employment, regardless of background, identity, or status. You’re always welcome to reach out even if you don’t meet many of these qualifications. Passion and aptitude make up for a lot.

What we offer

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

Highly competitive equity grants are included with full time offers. As well as semi-annual bonuses tied to your impact, not just your tenure.

Additionally, Arc offers 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

Generous time off — Highly competitive PTO with an opportunity to earn more time with tenure

Income protection — Life and disability insurance for all employees

Retirement savings — Traditional and Roth 401(k) access

Water fund — …