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Senior Principal Marine Engineer Jobs (NOW HIRING)

Ocean Atomics LLC

Principal Marine Engineer

$185K - $235K/yr

Role Summary The Principal Marine Engineer serves as the technical authority for marine engineering across Ocean Atomics' standardized nuclear electric plant and the vessels built to our nuclear ...

Ocean Atomics LLC

Director of Maritime Technical

$220K - $276K/yr

You direct fast-moving design iterations, guide the Principal Naval Architect and Principal Marine Engineer, and set the design criteria that clear classification society and flag state review. This ...

AMERICAN SYSTEMS

Journeyman Marine Engineer

Washington, DC · Hybrid

$85K - $98K/yr

As a Journeyman Marine Engineer , you will have the opportunity to do the following: * Assist Senior Mechanical Engineers in design, development, and evaluation of the operation of marine vessels ...

ICI Services Corporation

Senior Marine Engineer

Washington, DC · On-site

$118K - $162K/yr

Senior Marine Engineer - Position Description Join a team that's shaping the future of Navy support. ICI Services -a 100% employee-owned company proudly celebrating 26 years of excellence -is seeking ...

ICI Services

Senior Marine Engineer

Washington, DC · Hybrid

$118K - $162K/yr

... Senior Engineer to Join our Team in Washington, DC. At ICI Services, our employee-owners drive ... The candidate must hold a degree in engineering with Naval or Marine focuses preferred. This ...

ICI Services

$104K - $143K/yr

... a Senior Engineer to Join our Team in a Remote capacity . At ICI Services, our employee-owners ... The candidate must hold a degree in engineering with Naval or Marine focuses preferred. This ...

Oracle

Senior Marine Engineer

Seattle, WA · On-site

$119K - $163K/yr

Detailed The Senior Marine Engineer will be responsible for ensuring safe, efficient, and compliant operation of vessel machinery systems. This role plays a critical part in maintaining propulsion ...

The Vision Companies

Senior Marine Engineer

Seattle, WA

$119K - $163K/yr

Detailed The Senior Marine Engineer will be responsible for ensuring safe, efficient, and compliant operation of vessel machinery systems. This role plays a critical part in maintaining propulsion ...

Oracle

Senior Marine Engineer

Seattle, WA · On-site

$119K - $163K/yr

Detailed The Senior Marine Engineer will be responsible for ensuring safe, efficient, and compliant operation of vessel machinery systems. This role plays a critical part in maintaining propulsion ...

Emprise Corporation

Senior Marine Engineer

Chesapeake, VA · On-site

$101K - $139K/yr

We're looking for an experienced Senior Marine Engineer to grow our team in Chesapeake, VA. If you're looking for an opportunity to work on meaningful projects in a dynamic, forward-thinking ...

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How much do senior principal marine engineer jobs pay per year?

As of Sep 9, 2026, the average yearly pay for senior principal marine engineer in the United States is $155,430.00, according to ZipRecruiter salary data. Most workers in this role earn between $125,500.00 and $173,000.00 per year, depending on experience, location, and employer.

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Infographic showing various Senior Principal Marine Engineer job openings in the United States as of August 2026, with employment types broken down into 94% Full Time, 2% Part Time, and 4% Contract. Highlights an 85% Physical, 5% Hybrid, and 10% Remote job distribution, with an average salary of $155,430 per year, or $74.7 per hour.

Principal Marine Engineer

Remote

Ocean Atomics LLC
See more jobs at Ocean Atomics LLCexternal

$185K - $235K/yr

Full-time

Re-posted 17 days ago

Job description

The ocean is the largest undeveloped frontier on earth - and the next chapter of abundant energy will be written at sea. We're building the infrastructure to power it.
About Ocean Atomics (OA)
Ocean Atomics is an American company designing, licensing, and assembling a standardized nuclear electric power plant and the surrounding support systems for maritime applications. We will install these plants on any vessel built to our nuclear-ready standards, and will provide end-to-end sustainment in our planned nuclear lifecycle dockyard. We will help develop the licensed operators to unlock this new capability for your energy intensive application at sea. To move fast and to lead the creation of this new market, we are leveraging the compact, proven systems enabled by water-cooled reactors.
Our mission
Scale nuclear energy. Power generations.
Our vision
A maritime commons thriving with abundant, economical, modern, and safe nuclear-powered activity - built, serviced, and staffed by re-industrialized American shipyards and people.
Role Summary
The Principal Marine Engineer serves as the technical authority for marine engineering across Ocean Atomics' standardized nuclear electric plant and the vessels built to our nuclear-ready guide. Where naval architecture shapes the vessel, this role owns the propulsion, electrical, auxiliary, and control systems that let a compact, water-cooled reactor integrate cleanly onto a maritime platform after delivery.
You will lead the Marine Engineering domain-directing specialist leads across Propulsion, Electrical Generation, Auxiliary & Distribution, and Controls & Communications-from initial concept through class approval and operational deployment. You will define the physical, thermal, and electrical interface boundaries between the conventional hull and the reserved reactor compartment, and convert cross-disciplinary inputs into regulatory-approved, shipyard-ready packages. This is the engineering that brings nuclear power to sea.
The ideal candidate treats interface discipline as the foundation of a clean integration rather than a constraint to work around, and holds technical rigor and collaborative work with class and flag reviewers as two sides of the same job.
What You'll Do
  • Lead the marine engineering of the Test and Training Platform (TTP) and follow-on products across their full life cycle, directing the propulsion, electrical, auxiliary, and controls domain leads toward a harmonized machinery plant.
  • Define the physical, thermal, and mechanical interface boundaries that separate the conventional maritime hull from the reserved reactor compartment, ensuring clean isolation of vital ship systems.
  • Develop and validate the Piping & Instrumentation Diagrams (P&IDs) for high-capacity secondary cooling loops and containment isolation networks engineered for marine hazard conditions.
  • Establish the electrical load profiles and high-voltage distribution topologies that accept the nuclear electric plant's power output and synchronize it safely with onshore utility grids.
  • Steer the technical submittal strategy through classification society (ABS, LR, etc.) and flag state (USCG, etc.) reviews to secure hull classification and U.S. flag registration.
  • Evaluate fabrication tolerances and lifting capability at targeted integration yards so design specifications hold against real shipyard infrastructure constraints.

What You Bring
Required
  • Advanced degree in Marine Engineering, Mechanical Engineering, or a related heavy power or propulsion engineering discipline.
  • Track record of leading complex marine machinery and power systems from concept through regulatory approval and deployment. Typically built over 12+ years of engineering leadership in commercial shipbuilding, offshore energy, or first-of-a-kind marine platform design. Depth of experience, design cycles, and successful leadership of major marine engineering projects is valued above years of experience.
  • Direct experience leading multidisciplinary engineering teams through classification society (ABS, LR, etc.) and flag state (USCG, etc.) review processes.

Preferred
  • Experience with high-voltage marine power systems, utility grid integration, or hazardous fluid thermal management.
  • Exposure to nuclear quality assurance frameworks (ASME Section III, N-Stamp) or complex containment systems.

Don't meet every bullet? We'd still like to hear from you. If you're excited by the mission and most of this resonates, apply.
Export control notice
This position involves access to information subject to U.S. export control laws (ITAR and/or EAR). Any offer is contingent on your ability to work in compliance with these laws, and Ocean Atomics LLC may apply for U.S. government authorization where needed. We evaluate all applicants regardless of citizenship or national origin, except where required by law.
Why this matters
Every industry on Earth needs scalable, clean energy, and the ocean is the ideal place to unlock it. Joining Ocean Atomics means building real, lasting infrastructure - the kind that powers generations. The world needs abundant energy. Let's make it happen.
Ocean Atomics LLC is an equal opportunity employer.
We are committed to a workplace free of discrimination and do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, genetic information, veteran status, or any other characteristic protected by applicable law. We are committed to providing reasonable accommodations; if you need an accommodation during the application process, contact info@oceanatomics.com.

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