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Nuclear Startup Jobs (NOW HIRING)

Zeno Power

VP of Marketing

Washington, DC · On-site

$180K - $250K/yr

As we continue to scale in an increasingly competitive nuclear startup landscape, we need a brand leader who can build a world-class marketing function from strong fundamentals. Someone who knows how ...

Zeno Power

VP of Marketing

Washington, DC · On-site

$180K - $250K/yr

As we continue to scale in an increasingly competitive nuclear startup landscape, we need a brand leader who can build a world-class marketing function from strong fundamentals. Someone who knows how ...

Zeno Power

VP of Marketing

Seattle, WA · On-site

$180K - $250K/yr

As we continue to scale in an increasingly competitive nuclear startup landscape, we need a brand leader who can build a world-class marketing function from strong fundamentals. Someone who knows how ...

Zeno Power

VP of Marketing

Washington, DC · On-site

As we continue to scale in an increasingly competitive nuclear startup landscape, we need a brand leader who can build a world-class marketing function from strong fundamentals. Someone who knows how ...

Zeno Power

VP of Marketing

Seattle, WA

As we continue to scale in an increasingly competitive nuclear startup landscape, we need a brand leader who can build a world-class marketing function from strong fundamentals. Someone who knows how ...

Zeno Power

VP of Marketing

Seattle, WA · On-site

$180K - $250K/yr

As we continue to scale in an increasingly competitive nuclear startup landscape, we need a brand leader who can build a world-class marketing function from strong fundamentals. Someone who knows how ...

Radiant Industries

Nuclear Engineer

El Segundo, CA · On-site

$106K - $146K/yr

About Radiant Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe ...

Radiant

Nuclear Engineer

El Segundo, CA · On-site

$106K - $146K/yr

About Radiant Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe ...

Oklo

Nuclear Training Instructor

Lockhart, TX · On-site +1

$52K - $68K/yr

We are searching for a Nuclear Training Instructor to join our Plant Operations team. Position ... Support the startup and implementation of new operational and technical training programs for ...

Dominion Energy

Supv Nuclear Engineering

Mineral, VA · On-site

$143K - $171K/yr

Nuclear station engineering experience is highly desired * Excellent written and verbal ... startup test program, (c) Power increase from 10% to 100%, including stabilization of xenon, (d ...

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All JobsNuclear Startup Jobs

Nuclear Startup information

See salary details

$39K

$115.1K

$154.5K

How much do nuclear startup jobs pay per year?

As of Jun 8, 2026, the average yearly pay for nuclear startup in the United States is $115,106.00, according to ZipRecruiter salary data. Most workers in this role earn between $109,500.00 and $131,000.00 per year, depending on experience, location, and employer.

What is the difference between Nuclear Startup vs Nuclear Engineer?

AspectNuclear StartupNuclear Engineer
CredentialsTypically requires a degree in nuclear engineering, physics, or related fieldRequires a degree in nuclear engineering, physics, or related field; often professional licensure is preferred
Work EnvironmentInnovative, startup setting; fast-paced; often in research labs or new facility developmentEstablished facilities or project sites; research, design, and operational roles in nuclear plants or labs
Employer & Industry UsageStartups, research institutions, renewable energy projectsPower plants, government agencies, engineering firms

In summary, Nuclear Startup roles focus on innovative projects within emerging nuclear technologies, often in dynamic environments, while Nuclear Engineers work in established facilities, applying their expertise to design, safety, and operational tasks. Both roles require similar educational backgrounds but differ in work setting and project scope.

What are the key skills and qualifications needed to thrive as a Nuclear Startup Engineer, and why are they important?

To thrive as a Nuclear Startup Engineer, you need a robust understanding of nuclear physics, reactor operations, and engineering principles, typically demonstrated by an engineering degree and relevant certifications such as a Nuclear Regulatory Commission (NRC) license. Familiarity with reactor simulation software, plant control systems, and diagnostic instrumentation is essential for safe and effective plant startups. Strong problem-solving abilities, attention to detail, and clear communication skills help you excel in high-pressure, safety-critical scenarios. These skills ensure the safe commissioning of nuclear plants and compliance with strict regulatory standards.

What are the typical challenges faced by professionals working in Nuclear Startup roles, and how can they be addressed?

Professionals in Nuclear Startup roles often encounter challenges such as coordinating complex testing schedules, ensuring strict regulatory compliance, and managing effective communication among multidisciplinary teams. Successfully navigating these challenges requires strong organizational skills, attention to detail, and proactive problem-solving. Building trust through clear communication with engineers, operators, and regulatory bodies is also essential. Continuous learning and adaptability help address evolving technical and safety requirements, contributing to both individual and project success.

Which nuclear startup last raises 100 million to build small reactor?

One notable nuclear startup that recently raised over $100 million to develop small modular reactors is NuScale Power. The company secured significant funding to advance its scalable reactor technology, which aims to provide safer and more flexible nuclear energy solutions. This funding supports engineering, licensing, and manufacturing efforts for commercial deployment.

What is a Nuclear Startup engineer?

A Nuclear Startup engineer is a professional responsible for overseeing the initial testing, commissioning, and safe startup of nuclear reactors and power plants. They ensure that all systems function correctly and safely before the plant begins full operations. This role involves coordinating with various teams, performing detailed safety checks, and following strict regulatory protocols. Nuclear Startup engineers play a critical role in ensuring the plant operates efficiently and meets all safety standards from the very beginning.
Infographic showing various Nuclear Startup job openings in the United States as of May 2026, with employment types broken down into 80% Full Time, 15% Contract, and 5% Nights. Highlights an 95% In-person, and 5% Hybrid job distribution, with an average salary of $115,106 per year, or $55.3 per hour.

Nuclear Engineer I/II (Reactor Design)

Fissionaire

Madison, WI

$99K - $118K/yr

Full-time

Posted 22 days ago

Job description

As an emerging leader in nuclear engineering, our startup is developing revolutionary reactor technology to secure safe and abundant energy for future generations.  We are seeking a highly skilled entry-level Nuclear Engineer I/II to join our dynamic team and contribute to the design and development of next-generation nuclear reactors.


The Nuclear Engineer I/II will contribute to the design, analysis, and optimization of advanced nuclear reactor systems. The ideal candidate will have a strong background in nuclear engineering, proficiency with industry-standard design software, and a proactive, self-starting attitude. This role requires innovative thinking, technical expertise, and a commitment to advancing safe and sustainable nuclear energy solutions.

Key responsibilities
  • Design and develop nuclear reactor systems, including core design, thermal-hydraulics, and safety systems, ensuring compliance with regulatory standards.
  • Perform simulations and analyses to optimize reactor performance, safety, and efficiency using industry-standard software tools.
  • Collaborate with multidisciplinary teams, including mechanical engineers, materials scientists, and safety analysts, to integrate reactor designs into broader systems.
  • Conduct risk assessments and safety analyses to ensure designs meet stringent nuclear safety requirements.
  • Prepare technical reports, design documentation, and presentations for internal stakeholders and regulatory bodies.
  • Stay updated on advancements in nuclear technology, materials, and regulations to incorporate cutting-edge solutions into designs.
  • Participate in project planning and scheduling to ensure timely delivery of design milestones.
  • Contribute to research and development initiatives for innovative reactor concepts.  
qualifications
  • Master’s degree in Nuclear Engineering or a related field. Ph.D. preferred but not required.
  • Minimum of 1-2 years of experience in nuclear reactor design, analysis, or related fields within industry or in academic work.
  • Proficiency with nuclear design and analysis software, such as MCNP, SCALE, RELAP5, COMSOL, MOOSE, GOTHIC etc.
  • Familiarity with CAD software for reactor component design.
  • Proficiency in programming languages for data analysis, scripting, or automation of design processes.
  • Knowledge of nuclear physics, neutronics, thermal-hydraulics, and reactor safety principles.
  • Experience with Molten Salt Reactor design preferred.
  • Demonstrated ability to work independently, take initiative, and drive projects to completion with minimal supervision.
  • Excellent written and verbal communication skills for technical documentation and cross-functional collaboration.
  • Familiarity with nuclear regulatory frameworks and safety standards.
  • Knowledge of materials science, particularly related to radiation-resistant materials and high-temperature applications.
  • Familiarity with risk assessments and analysis (PRA, FMEA, PIRT etc.) preferred
  • Familiarity with computational fluid dynamics (CFD) for thermal-hydraulic analysis preferred.
  • U.S. citizenship or permanent residency required.
What we offer
  • Competitive salary with equity options
  • Comprehensive benefits, holiday and PTO schedule
  • Opportunity to shape foundational operations in a groundbreaking nuclear startup.

Fissionaire’s technology is subject to U.S. export control regulations, which require the company to review applicants’ eligibility based on their citizenship or residency status. As part of the application process, candidates will be asked to indicate whether they are a U.S. citizen, green card, lawful permanent resident, asylee, or refugee resident to support this review. Because government authorization timelines can vary, Fissionaire is unable to consider alternate resident statuses where required approvals may not be obtainable within a timeframe that meets business needs.

Fissionaire is an Equal Opportunity Employer that does not discriminate on the basis of actual or perceived race, colour, creed, religion, national origin, ancestry, citizenship status, age, sex or gender (including pregnancy, childbirth, pregnancy-related conditions, and lactation), gender identity or expression (including transgender status), sexual orientation, marital status, family or relationship structure, military service and veteran status, physical or mental disability, genetic information, gender identity, or any other characteristic protected by applicable federal, state, or local laws and ordinances. Fissionaire’s management team is dedicated to this policy with respect to recruitment, hiring, placement, promotion, transfer, training, compensation, benefits, employee activities, access to facilities and programs, and general treatment during employment.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.