Engineer IV - VI, Nuclear Safety Analysis
X-Energy
Rockville, MD · Posted October 23, 2026
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Where Rockville, MD ranks
Where Rockville, MD placed in our monthly rankings, month by month. Each month stays online at its own address.
November 2026
- #7Cities with the most hybrid jobs in the Mid-Atlantic22% · of 84
- #12Cities with the most hybrid jobs22% · of 100
- #12Best all-round cities for remote workers in the Mid-Atlantic67 / 100 · of 37
- #13Best cities for pay after cost of living in the Mid-Atlantic$143k · of 37
- #14Best all-round cities for AI careers in the Mid-Atlantic59 / 100 · of 37
- #18Best all-round cities for new graduates in the Mid-Atlantic54 / 100 · of 37
Rankings about engineering jobs
- Best cities for software and engineering jobs #1 San Francisco (3,412 openings)
- Best cities for engineering pay after cost of living #1 San Mateo ($216k)
- Most requested AI skills in engineering jobs #1 AI tools in daily work (6.1%)
- AI tools named most often in engineering jobs #1 Claude (1.7%)
- Employers with the most engineering jobs #1 Amazon (2,992 roles)
How AI is used in this kind of work
AI use among nuclear engineers is little observed so far. Measured exposure for nuclear engineers: 0% (little observed).
Share of this job’s tasks that AI is already used for at work, from real usage. It is not a forecast of job loss, and a low number means no use seen yet. Source: Anthropic Economic Index.
About the job
X-energy LLC conducts a thorough recruiting process and will never issue offers without interview to discuss qualifications and responsibilities. All applications will be submitted via our company career page, www.x-energy.com/careers/. We will never ask you to provide payment information as part of the recruiting process. If anyone claiming to represent X-energy directs you in a manner otherwise, please contact us at www.x-energy.com/contact-us.
Job Description
This role is responsible for performing safety analysis and/or probabilistic risk assessments (PRA) in accordance with the appropriate industry standards and guidance, authoring and reviewing safety analysis/PRA-related documents, and providing results and insights to the design of X-energy technologies. This role will use software to create and maintain models that represent the design of X-energy projects and technologies. They will also produce and review calculation documents that support and control the PRA or safety analysis model files, use models, and apply them to a range of applications to support the design and future operation of X-energy projects and technologies.
Job Profile Tasks/Responsibilities
• Perform various safety analyses in one or more of the following areas: • Lead system-level thermal-fluid analyses and process design using 1-D system simulation codes.
• Guide, initiate source term analyses and radiological consequence analysis.
• Lead development of models to support licensing basis event analysis and evaluations.
• Perform elementary mathematical model programming for engineering calculations.
• Develop verification and validations plans, including code V&V efforts.
• Lead the execution of the core tasks and responsibilities, listed in the Job Profile Task/Responsibilities section of this document, without close supervision and complete latitude for independent judgement.
• Provide feedback and guidance to more junior team members with the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document.
• In collaboration with engineering leadership, set technical direction at the enterprise level through developing and owning technology or discipline specific roadmaps, best practices, and/or design criteria.
• Able to show increasing proficiency interpreting, applying, and assessing Standards.
• Collaborate and communicate with key stakeholders in engineering, project leadership, and across the safety analysis team to provide frequent updates on progress of projects, maintain the correct order of priorities and ability to adapt to change, and raise concerns when there are problems with projects and/or timelines.
• Provide engineering/technical expertise and guidance in the identification, analysis, and resolution of problems of increasing scope and complexity.
• Contribute to team decision-making in the accomplishment of business goals and objectives through effective planning, organizing, estimating, scheduling, and monitoring of work activities; deal with changing priorities and differing situations and make decisions that may affect the work of the team.
• Prepare thorough and accurate technical reports, correspondence, documentation, calculations, and sketches related to well-defined problems and analysis of increasing scope and complexity.
• Conduct engineering and related studies; complete routine engineering projects with minimal oversight with increasing ability to independently manage project schedules and interfaces.
• Develop and maintain safety basis documents and safety basis program procedures.
• Identify and describe the interrelationship of safety basis requirements to existing and new designs and operations.
• Develop, maintain, and produce technical documentation to inform system/subsystem requirements and specifications.
• Interface with customers and regulators in nuclear safety reviews and technical working group meetings to comply with requirements and meet project objectives.
• Maintain professional demeanor and behavior at all times in all forms of communication.
• Perform other duties as assigned by manager.
Job Profile Minimum Qualifications
• Bachelor’s degree in engineering (nuclear, chemical, mechanical, etc.) from an ABET accredited university required.
• Typically, ten years of experience in an engineering role required for a level IV.
• Typically, fifteen years of experience in an engineering role required for a level V.
• Typically, twenty years of experience in an engineering role required for a level VI. • A master’s degree in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of two years of experience.
• A Ph.D. in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of three years of experience.
• Previous experience at X-energy meeting performance standards may be in lieu of years of experience.
Location: 9801 Washingtonian Boulevard, Gaithersburg, Maryland Work Site Expectations: 4-5 days in office
Travel Expectations: 10% travel
Hours: standard office schedule is 8:00am-5:00pm ET, Mon-Fri
Compensation
As required by Maryland and other applicable state law, X Energy, LLC (X-energy) lists the expected compensation range for a publicly advertised job opportunity based upon the job requirements (e.g. education/training, experience, skill sets, etc.). Individual candidates who meet the job requirements for the posted position will be offered a salary within this range based on their respective levels of education/training, experience, and other qualifications unique to them. Salary ranges may vary based on the specific office location and region referenced in the posting to take into consideration differences in cost of living and may not be reflective of all regions. Please note that compensation ranges listed for US job postings reflect base salary only and do not include benefits or other incentives.
Offers within the posted salary range are commensurate with the individual’s qualifications for the position, along with a view on internal equity, market data, and room for growth. The salary range for this position is:
Level IV: $112, 000- $166,000/Level V: $138,500- $193,000/ Level VI: $166,000- $221,000
Position Job Classification
Full time - Exempt
Benefits
X Energy, LLC offers a robust benefits package that includes a 401K plan with an employer match, Medical/Dental /Vision Insurance, Life and Disability Insurance, Paid Time Off, and a Tuition Reimbursement/Professional Development policy that supports the continuing education of our employees.
An Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.
X Energy, LLC participates in E-Verify. Please visit the links below for more information about E-Verify and the protection of your Right to Work.
Right To Work Link: If you have the right to work, don't let anyone take it away (e-verify.gov)
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