Senior Mechanical Engineer

Arc; Los Angeles (CA); On-site; USD 150,000 - 180,000; Full time

Benefits offered by this job

Healthcare benefits

Parental leave

Generous PTO

Income protection

401(k) options

Relocation assistance

Job summary

Arc is engineering the electrification of the marine industry. We seek a Mechanical Engineer to own electromechanical system design from concept through production, reporting to the Mechanical Systems Engineering Manager at our Los Angeles headquarters.

You will drive cross-discipline collaboration across mechanical, electrical, thermal, and manufacturing domains, from prototyping to validation and production support, including sea trials and field testing.

Qualifications

• 4+ years of experience owning complete mechanical or electromechanical systems from initial design through production.
• Strong fundamentals in structural and thermal engineering.
• Electrical systems knowledge including high-voltage battery systems and power electronics.
• Experience designing large assemblies or complex multidisciplinary systems.
• 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.
• Hands-on hardware experience 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.

Responsibilities

• Own the design and integration of complex electromechanical systems across the vehicle lifecycle, from concept through production.
• Drive requirements definition, specifications, CAD design, prototyping, validation, and production support.
• Collaborate across mechanical, electrical, thermal, and manufacturing domains to ensure integrated systems.
• Work with suppliers, shipyards, and cross-functional teams to drive execution and meet timelines.
• Support sea trials and in-field validation to verify system performance and resolve issues.
• Travel occasionally (~15%) to support testing, validation, and field operations.

Skills

Mechanical design

Electromechanical systems

CAD tools

FEA / Modeling

Manufacturing knowledge

High voltage systems

Field testing

Education

Bachelor's degree in Mechanical Engineering

Tools

NX

CATIA

SolidWorks

MATLAB/Simulink

FEA software

Job description

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

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

• Working across mechanical, electrical, thermal, and manufacturing domains
• Understanding how assemblies, subsystems, and components interact as part of a larger integrated vehicle.
• Driving execution across suppliers, shipyards, manufacturing partners, and internal cross-functional teams.
• Owning the design and integration of complex electromechanical systems across the vehicle lifecycle, from concept through production
• 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 of experience owning complete mechanical or electromechanical systems from initial 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
• 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 high voltage battery systems
• Exposure to sheet metal manufacturing, CNC machining, composites, or shop tools
• Experience with fluid system design including pump sizing, heat exchanger sizing, and hose/pipe routing
• 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 — $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.

Our Values

We move with urgency and build with care. We value these five things above all else:

• 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
• Inclusion of different backgrounds, opinions, cultures, and perspectives.

We want people who share and embody these values. It is vital that our values align - we'd be happy to elaborate on any or all of these during the interview process.