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Nuclear Reactor Design Engineer Jobs (NOW HIRING)

Zap Energy

Micro Reactor Lead Engineer

Everett, WA · On-site

$150K - $210K/yr

Nuclear Fuel * * Reactor Internals * * Reactor Vessel * * Reactivity Control System * * Software V&V * * Integration of Design, Testing, and Safety Case Activities * * Development of Design Basis ...

Antares

Senior Nuclear Methods Engineer

Los Angeles, CA · On-site

$150K - $185K/yr

Develop and maintain steady-state and transient nuclear analysis methods used for reactor design ... Bachelor's degree in Nuclear Engineering, Mechanical Engineering, Physics, or a related technical ...

Zap Energy Inc.

Micro Reactor Lead Engineer

Everett, WA · On-site

$150K - $210K/yr

Nuclear Fuel * Reactor Internals * Reactor Vessel * Reactivity Control System * Software V&V * Integration of Design,Testing, and Safety CaseActivities * Development ofDesign BasisDocumentation

53 Stations

Senior Nuclear Methods Engineer

Los Angeles, CA · On-site

$106K - $127K/yr

Develop and maintain steady-state and transient nuclear analysis methods used for reactor design ... Bachelor's degree in Nuclear Engineering, Mechanical Engineering, Physics, or a related technical ...

53 Stations

$72K - $87K/yr

Develop and maintain steady-state and transient nuclear analysis methods used for reactor design ... Bachelor's degree in Nuclear Engineering, Mechanical Engineering, Physics, or a related technical ...

Deep Fission, Inc

Nuclear Safety Analysis Engineer

Deep Fission is seeking a mid-career Nuclear Safety Analysis Engineer to support the design, development, and safety analysis of our Gravity Nuclear Reactor. Functions within this role include ...

Deep Fission, Inc

Nuclear Safety Analysis Engineer

Deep Fission is seeking a mid-career Nuclear Safety Analysis Engineer to support the design, development, and safety analysis of our Gravity Nuclear Reactor. Functions within this role include ...

BWXT

Electrical System Design Engineer

Lynchburg, VA · On-site

$85K - $134K/yr

S.-based company, BWXT is a Fortune 1000 and Defense News Top 100 manufacturing and engineering ... Experience with the design and operation of electromechanical nuclear reactor control systems.

BWXT

Mechanical System Design Engineer

Lynchburg, VA · On-site

$85K - $134K/yr

The System Design Engineering group supports programs for internal and external customers across ... Previous nuclear reactor experience. * Experience with MatLab, and/or MathCad. * Experience with 2D ...

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Nuclear Reactor Design Engineer information

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How much do nuclear reactor design engineer jobs pay per hour?

As of Sep 10, 2026, the average hourly pay for nuclear reactor design engineer in the United States is $85.10, according to ZipRecruiter salary data. Most workers in this role earn between $82.69 and $93.75 per hour, depending on experience, location, and employer.

What does a nuclear reactor design engineer do?

A Nuclear Reactor Design Engineer is responsible for designing, analyzing, and improving nuclear reactors and their components to ensure efficiency, safety, and compliance with regulatory standards. They work on developing reactor systems, fuel cycles, cooling systems, and safety protocols. Their work involves using advanced computer modeling, conducting simulations, and collaborating with multidisciplinary teams to address technical challenges in nuclear power generation. These engineers play a crucial role in advancing nuclear technology and supporting the safe operation of nuclear facilities.

What are the key skills and qualifications needed to thrive as a nuclear reactor design engineer, and why are they important?

To thrive as a Nuclear Reactor Design Engineer, you need a solid background in nuclear engineering, physics, and mathematics, typically supported by a relevant engineering degree and often a Professional Engineer (PE) license. Familiarity with industry-standard simulation software (such as MCNP or RELAP), CAD systems, and regulatory codes is essential. Strong problem-solving, teamwork, and communication skills help you collaborate effectively and address complex design challenges. These competencies are crucial for ensuring safe, efficient, and regulatory-compliant reactor designs in a highly technical and safety-critical environment.

What are some common challenges faced by nuclear reactor design engineers when working on new reactor projects?

Nuclear Reactor Design Engineers often encounter challenges such as ensuring compliance with strict safety regulations, integrating cutting-edge technology within established frameworks, and managing interdisciplinary coordination with teams like structural, thermal, and safety engineers. Balancing innovation with regulatory requirements can be demanding, as every design decision must consider long-term reliability and public safety. Additionally, adapting designs to meet evolving industry standards and addressing feedback from regulatory bodies are integral parts of the role.

What is the difference between Nuclear Reactor Design Engineer vs Nuclear Safety Engineer?

AspectNuclear Reactor Design EngineerNuclear Safety Engineer
Primary FocusDesigning and developing nuclear reactor systems and componentsEnsuring safety protocols and risk assessments for nuclear facilities
Required CredentialsEngineering degree, possibly PE license, specialized training in reactor designEngineering or science degree, certifications in safety standards, risk management
Work EnvironmentDesign labs, research facilities, nuclear power plantsRegulatory agencies, nuclear plants, safety analysis labs
Industry UsageUsed during reactor development and construction phasesUsed in safety evaluations, compliance, and incident prevention

While both roles require engineering expertise and knowledge of nuclear systems, Nuclear Reactor Design Engineers focus on creating and improving reactor designs, whereas Nuclear Safety Engineers prioritize safety protocols and risk mitigation to ensure safe operation of nuclear facilities.

How much do nuclear reactor design engineers make?

Nuclear reactor design engineers typically earn a median annual salary of around $100,000 to $130,000, depending on experience, education, and location. Senior engineers or those with specialized skills and certifications can earn higher salaries, often exceeding $150,000 annually.

How much does a nuclear reactor design engineer make?

A nuclear reactor design engineer typically earns between $80,000 and $130,000 annually, depending on experience, education, and location. Senior engineers or those with specialized skills and certifications can earn higher salaries, often exceeding $150,000. The role often requires knowledge of nuclear physics, reactor systems, and safety regulations.

What cities are hiring for Nuclear Reactor Design Engineer jobs?

Cities with the most Nuclear Reactor Design Engineer job openings:

What states have the most Nuclear Reactor Design Engineer jobs?

States with the most job openings for Nuclear Reactor Design Engineer jobs include:

What are popular job titles related to Nuclear Reactor Design Engineer jobs?

For Nuclear Reactor Design Engineer jobs, the most frequently searched job titles are:

Nuclear Reactor Design Engineer jobs near you
Infographic showing various Nuclear Reactor Design Engineer job openings in the United States as of August 2026, with employment types broken down into 88% Full Time, 7% Part Time, and 5% Contract. Highlights an 85% Physical, 4% Hybrid, and 11% Remote job distribution, with an average salary of $177,000 per year, or $85.1 per hour.

Nuclear Engineer I/II (Reactor Design)

Madison, WI

Fissionaire
See more jobs at Fissionaireexternal

$99K - $118K/yr

Full-time

PTO

Re-posted 26 days ago

Key responsibilities

  • Design and develop nuclear reactor systems, including core design, thermal-hydraulics, and safety systems.

  • Perform simulations and analyses to optimize reactor performance, safety, and efficiency using industry-standard software tools.

  • Collaborate with multidisciplinary teams to integrate reactor designs into broader systems.

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 and identifying potential inconsistencies or verification signals in application materials based on available information. 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.