Senior Nuclear Core Design Engineer

ZipRecruiter; Allentown (Lehigh County); Remote; USD 80,000 - 120,000; Full time

Job summary

A forward-thinking company in the clean energy sector is seeking a Senior Core Design Engineer to join its innovative nuclear analysis group. This fully remote role offers the chance to work on cutting-edge projects like the SMR-300 reactor, requiring significant expertise in core design for pressurized water reactors. The ideal candidate will have a strong background in neutronics and simulation, along with excellent communication skills. This position not only allows for technical contributions but also offers flexibility and the opportunity to make a meaningful impact in the nuclear energy landscape. If you're passionate about advancing clean energy solutions, this is the perfect opportunity for you.

Qualifications

• 7+ years of experience in nuclear core/fuel design.
• Expertise in PWR core design and simulation.
• Strong communication and technical writing skills.

Responsibilities

• Contribute to core design and analysis of the SMR-300.
• Ensure compliance with NRC regulations and industry standards.
• Collaborate with engineering teams and regulatory stakeholders.

Skills

PWR core design

Neutronics

Technical writing

Communication skills

Python

Education

BS in Nuclear Engineering

MS in Nuclear Engineering

PhD in Nuclear Engineering

Tools

CASMO/SIMULATE

MCNP

S5K

Microsoft Office Suite

Job description

Job Description

POSITION OPEN

Position: Senior Core Design Engineer

Place of Work: Camden (NJ); Jupiter (FL); Cranberry (PA); Madrid (Spain); Bristol (UK); Kyiv (Ukraine).

Holtec International seeks highly experienced applicants for a senior-level position in its nuclear analysis group to support the continued development and licensing of the SMR-300 reactor through its subsidiary, SMR LLC. This contractor role is a fully remote opportunity and is ideal for individuals with significant technical expertise and experience in core design for pressurized water reactors (PWRs), particularly Small Modular Reactors (SMRs).

The selected candidate will be responsible for contributing to the core design and analysis of the SMR-300, with a focus on high-quality technical execution in compliance with NRC regulations and industry standards. The position involves close collaboration with internal engineering teams and regulatory stakeholders, and offers flexibility for an independent contributor to have meaningful impact on an advanced nuclear energy project.

Minimum Technical Requirements:

• BS degree in Nuclear Engineering or closely related technical field with at least 7 years of relevant experience — OR — MS degree with at least 6 years of relevant experience — OR — PhD with at least 4 years of relevant experience in nuclear core/fuel design
• Expertise in PWR core design, neutronics, and simulation
• Demonstrated experience with CASMO/SIMULATE
• Familiarity with NRC regulations and QA requirements
• Strong communication and technical writing skills
• U.S. work authorization and eligibility to access export-controlled information

Desirable Additional Qualifications:

• Proficiency in Python for simulation automation or data processing
• Familiarity with core accident analysis methods (e.g., rod ejection)
• Experience with core simulation platforms such as MCNP and S5K
• Knowledge of licensing methodologies including technical specs, safety margins, and federal regulations

Software Tools Used: CASMO/SIMULATE, MCNP, S5K, Python; Microsoft Office Suite.

Minimum Experience Required: 4–10+ years, depending on academic qualifications.

References Required: Minimum of 3 external references.

As a technology trailblazer and a prominent innovator in the clean energy industry, Holtec fosters a meritocratic environment conducive to continuous learning and professional growth. Holtec is an equal opportunity employer with a strong commitment to social equity and environmental justice, and gives preference to disabled veterans in its hiring policies. Learn more about Holtec at holtecinternational.com.

Candidates interested in this opportunity should submit a résumé along with at least three references.

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