Senior Mechanical Engineer - Recreational

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 We’re looking for someone who’s fired up by our mission and ready to build. You’ll thrive here if you adapt quickly, take ownership, and care about the details. This is a full-time, on-site role at our Los Angeles headquarters. You’ll report to the Lead Mechanical Engineer and work closely with a lean, high-trust team where everyone’s work matters. What You'll Do

• Owning major boat systems from specification through design, prototyping, validation, and high-volume manufacturing, including assembly structure, mass, cost, and schedule

• Designing and releasing hardware across the full boat, including: • Composite structures: hull, deck, stringer, hatches, and hardtop, with Class A surfacing for visible parts

• Interiors & mechanisms: upholstery, tower, windshield, storage

• Marine systems: ballast, bilge, steering, cooling, and surf tabs

• Defining system requirements and leading design reviews, making tradeoffs across performance, weight, cost, and manufacturability

• Leading prototyping through on-water testing, root-causing failures, and driving fixes into production

• Integrating with battery, powertrain, electrical, and controls teams on packaging and interfaces

• Partnering with industrial design, suppliers, and manufacturing on DFM and next-generation products

• Mentoring engineers and setting the technical bar for the team

• Comfortable working hands-on in production or traveling to suppliers when needed

Minimum Qualifications

• Bachelor’s degree in Mechanical Engineering or related Engineering field
• 5+ years of industry experience, including taking hardware from concept through production
• Expert in CAD (NX preferred, CATIA, or SolidWorks) with strong command of PLM systems (Teamcenter preferred)
• Experience working with composite structures
• Strong engineering fundamentals with hands-on use of hand calcs and FEA to validate designs
• Proven design for manufacturing experience releasing parts to suppliers
• Hands-on experience in fabrication, assembly, and testing
• Ability to lead technical decisions and defend them with data
• Clear written and verbal communication, with strong prioritization at a fast but sustainable pace

Bonus Qualifications

• Marine, automotive, aerospace, or EV hardware experience (marine preferred)
• Fiberglass part infusion or open molding experience
• Tooling design experience
• Soft goods experience
• Have worked alongside industrial design teams with Class A surfaces
• Familiarity with ABYC standards
• Engineering leadership or mentorship experience
• Enthusiasm for boating 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:$185,000 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 Arc boats 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.