Intermediate Nuclear Engineer Energy

We are seeking an Intermediate Nuclear Engineer Energy Remote. This remote position is based out of our Oak Ridge TN office.

• This role requires a senior level engineer with a minimum of 3 years of nuclear engineering experience responsible for leading and supporting the execution oversight and coordination of nuclear engineering activities.
• Ensures technical deliverables design interfaces and nuclear safety information flow efficiently across engineering disciplines project functions and potentially external vendor interfaces.
• Operates within a multidisciplinary team this position requires deep expertise in Small Modular Reactor (SMR) designs.
• Integrates specialized functions across multiple engineering disciplines utilizing knowledge gained in the following core competencies:
• Neutron & Reactor Core Physics: Analyzing core behavior and reactor physics.
• Nuclear Safety & Analysis: Leading nuclear safety-related analyses and nuclear criticality safety assessments.
• Design & Shielding: Developing radiation shielding designs and managing fuel cycle operations.
• Logistics & Compliance: Overseeing radioactive material transportation and enforcing software quality assurance (SQA) standards.
• Software: Proficient with Attila4MC MCNP SCALE and/or Serpent codes and modules
• Regulatory Expertise: Comprehensive knowledge of US and international nuclear regulatory frameworks including NRC regulations (e.g. 10 CFR Parts 50 70 or 71) DOE orders and IAEA safety standards and guides.

Key Responsibilities

Specific responsibilities may require the candidate to:

• Nuclear Safety & Licensing Strategy.
• Lead and coordinate technical work supporting US nuclear safety licensing activities.
• Author review and approve technical documentation including various nuclear safety analyses and evaluation reports.
• Support licensing initiatives by assisting with the preparation of safety basis documents.
• Participate actively in hazard analyses process design reviews and configuration management activities.

Criticality Safety & Advanced Reactor Systems:

• Lead execute and approve Nuclear Criticality Safety Evaluations (NCSEs) and Nuclear Criticality Safety Analyses (NCSAs) for fuel fabrication handling storage and transportation processes.
• Establish and validate criticality safety limits and engineered/administrative controls (mass moderation geometry reflection enrichment and interaction) specifically for small modular reactor systems.
• Advance the development and maintenance of the Criticality Safety Program in strict alignment with ANSI/ANS-8 standards and applicable NRC/DOE regulations.

Neutronics Shielding & Software Quality Assurance (SQA):

• Apply validated neutronics methodologies and Monte Carlo codes (e.g. MCNP SCALE/KENO) to develop or assess margins to criticality bias and uncertainty.
• Lead perform and approve radiation shielding designs and radiation-transport analyses for fuel fabrication handling storage and transportation.
• Analyze and interpret radiation data to ensure operational safety shielding effectiveness and total regulatory compliance.
• Performs other duties as assigned.

• Requires a Bachelors degree in Nuclear Engineering or a closely related discipline. Masters or Ph.D. preferred.
• Requires 3 years of relevant experience with Bachelors degree.
• Experience in nuclear industry preferred.

Desired Skills:

• Technical Competencies-
• Advanced Reactor & SMR Design: Direct experience modeling or licensing Small Modular Reactors (SMRs) or advanced fuel systems (such as HALEU or TRISO fuel cycles).
• Software Quality Assurance (SQA): Experience managing code verification validation and benchmarking under a formal ASME NQA-1 or equivalent nuclear quality assurance program.
• Criticality Safety Analysis: Demonstrated experience authoring and approving Nuclear Criticality Safety Evaluations (NCSEs) and Analyses (NCSAs) for fuel processing storage or transport.
• Neutronics & Radiation Shielding: Proven ability to design radiation shielding and perform complex radiation-transport and core physics calculations.
• Nuclear Software Proficiency: Advanced hands-on proficiency with core particle transport and criticality codes specifically MCNP and SCALE/KENO (or equivalents like Attila4MC or Serpent).
• Regulatory Compliance: Comprehensive knowledge of US regulatory frameworks including Nuclear Regulatory Commission (NRC) regulations (specifically 10 CFR Parts 50 70 and 71) and ANSI/ANS-8 standards as well as Department of Energy (DOE) Orders Guides and Technical Standards and directives regarding nuclear facility safety bases.
• Leadership & Soft Skills-
• Technical Leadership: At least 7 years of engineering experience with a proven track record of reviewing verifying and formally approving the technical work of other engineers.
• Multidisciplinary Collaboration: Experience working within integrated cross-functional engineering teams (e.g. interfacing with mechanical thermal-hydraulic or structural systems).
• Technical Writing: Communication skills with documented experience authoring formal safety basis documents calculation packages or regulatory submittals.

At AtkinsRéalis our valuesSafety Integrity Collaboration Innovation and Excellenceare more than just words. They are the foundation of who we are and how we work. These principles shape our culture guide our decisions and inspire us to create an environment where every team member feels empowered to grow succeed and make a meaningful impact.

Depending on your employment status AtkinsRéalis benefits may include medical dental vision company-paid life and short- and long-term disability benefits employer-matched 401(k) with 100% vesting employee stock purchase plan Paid Time Off leaves of absences options flexible work options recognition and employee satisfaction programs employee assistance program and voluntary benefits. You can review our comprehensive benefits page here.

Were AtkinsRéalis a world-class engineering services and nuclear organization. We connect people data and technology to transform the worlds infrastructure and energy systems. Together with our industry partners and clients and our global team of consultants designers engineers and project managers we can change the world. Were committed to leading our clients across our various end markets to engineer a better future for our planet and its people.

Find out more.

Expected compensation range is between $74000 - $138700 annually depending on skills experience and geographical location.

Are you ready to expand your career with us Apply today and help us shape something extraordinary.

AtkinsRéalis is an equal opportunity Drug-Free employer EOE/Veteran/Disability

Please review AtkinsRéalis Equal Opportunity Statement here.

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AtkinsRéalis is committed to providing reasonable accommodations to qualified individuals with disabilities. If you require an accommodation to participate in the application interview or selection process please contact us at . Requests for accommodation will be considered in accordance with applicable law.

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In the event a recruiter or agency who is not on our preferred supplier list submits a resume/candidate to anyone in the company AtkinsRéalis family of companies we explicitly reserve the right to recruit and hire the candidate(s) at our discretion and without any financial obligation to the recruiter or agency. TypeEmployee