Intermediate Nuclear Engineer Energy - Remote

AtkinsRéalis Group; Oak Ridge (TN); Remote; USD 74,000 - 139,000; Full time

Benefits offered by this job

Medical benefits

Dental and vision coverage

401(k) with vesting

Job summary

AtkinsRéalis Group is seeking an Intermediate Nuclear Engineer Energy – Remote, based in Oak Ridge, TN. The role leads nuclear safety licensing activities and coordinates cross-disciplinary analyses to ensure regulatory compliance.

Strong emphasis on SMR design, criticality safety, shielding, and safety basis development is required. The position requires 3+ years of nuclear engineering experience, expertise with MCNP/SCALE/Serpent, and familiarity with NRC/DOE/IAN safety standards.

Qualifications

• Requires a Bachelor’s degree in Nuclear Engineering or a closely related discipline.
• Requires 3 years of relevant experience with Bachelor's degree.
• Experience in nuclear industry preferred.

Responsibilities

• Lead and coordinate technical work supporting US nuclear safety licensing activities.
• Author, review, and approve technical documentation including safety analyses and evaluation reports.
• Support licensing initiatives by assisting with safety basis documents.
• Participate in hazard analyses, process design reviews, and configuration management.

Skills

Neutron physics

Reactor core physics

Nuclear safety

Criticality safety

Radiation shielding

MCNP

SCALE

Attila4MC

Serpent

NRC regulations

Education

Bachelor's in Nuclear Engineering

Master's or PhD preferred

Tools

Attila4MC

MCNP

SCALE

Serpent

Job description

Intermediate Nuclear Engineer Energy - Remote# Career Opportunities## Intermediate Nuclear Engineer Energy - RemoteApply: US.TN.Oak Ridge.545 Oak Ridge Turnpike: Full time: Posted Today: R-167410### **Job Description**## **Overview**We are seeking **an Intermediate Nuclear Engineer Energy – Remote. This remote position is based out of our Oak Ridge, TN office.**## **Your role*** 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.## ## **About you*** Requires a Bachelor’s degree in Nuclear Engineering or a closely related discipline. Master’s or Ph.D. preferred.* Requires 3 years of relevant experience with Bachelor's 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. ## **Rewards & benefits**At AtkinsRéalis, our values—Safety, Integrity, Collaboration, Innovation, and Excellence—are 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. ## **About AtkinsRéalis**We're AtkinsRéalis, a world-class engineering services and nuclear organization. We connect people, data and technology to transform the world's 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. We're committed to leading our clients across our various end markets to engineer a better future for our planet and its people.Find out more.## ## **Additional information****Expected compensation range is between $74,000 - $138,700 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.**AtkinsRéalis cares about your privacy** and is committed to protecting your privacy. Please consult our Privacy Notice our Careers site to know more about how we collect, use and transfer your Personal Data. By submitting your personal information to AtkinsRéalis, you confirm that you have read and accept our Privacy Notice. Unless expressly authorized by AtkinsRéalis, candidates may not use generative artificial intelligence tools, real-time interview coaching applications, or AI-generated responses created during the interview. Candidates are expected to accurately represent their qualifications, experience, knowledge, and abilities throughout the recruitment process. The use of unauthorized assistance, misrepresentation of credentials or experience, or any conduct that compromises the integrity of the selection process may result in disqualification from further consideration or withdrawal of an employment offer, at the discretion of AtkinsRéalis.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 [e-mail]. Requests for accommodation will be considered in accordance with applicable law.**Note to staffing and direct hire agencies:**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. https://careers.atkinsrealis.com/recruitment-agencies