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Salary
$113k – $150k per year
Location
In office (Oak Ridge)
Seniority
Staff · 10+ years exp
Visa
H-1B filings in 12 months: 3
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 20, 2026. First seen by Alion on Sep 26, 2026.

Overview
Company
Impact
Profile match
X-energy is an advanced nuclear reactor and fuel company headquartered in Rockville, Maryland, developing the Xe-100 high-temperature gas-cooled small modular reactor and the TRISO-X fuel that powers it. Founded in 2009, it has further offices and sites in Frederick, Maryland and Oak Ridge, Tennessee, where its fuel fabrication facility is being built, and works with utility and industrial partners on first deployments of its reactors in the United States. It recruits mechanical, electrical, fuel and thermal hydraulics engineers, project controls and supply chain specialists, procurement and purchasing staff, construction field engineers and corporate functions such as HR and recruiting.
Backed by G Squared

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 position assists in the development and implementation of health physics and radiation protection programs, processes and/or systems, as necessary, for the plant operations to protect the radiological health and safety of workers and members of the public, and to control radiological effluent releases. This includes creating, documenting, and managing the technical and regulatory requirements of radiological design and safety programs. This role also assists in the technical development and implementation of engineering and program specific administrative procedures while ensuring they conform to all technical, regulatory, and internal program requirements.

Job Profile Tasks/Responsibilities:

  • Develop occupational radiation protection practices and ALARA program requirements for a first of its kind reactor or nuclear fuel fabrication facility.
  • Assist with the establishing a radiation safety program to ensure regulatory compliance as mandated by local, state, and federal agencies, including the Nuclear Regulatory Commission (NRC), the Occupational Safety and Health Administration (OSHA), and State Laws.
  • Evaluate and analyze radiological health hazards, or remediation of either byproduct, source or special nuclear material.
  • Collaborate and communicate with key stakeholders in project leadership and across the 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 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 technical studies; complete routine technical projects with minimal oversight with increasing ability to independently manage project schedules and interfaces.
  • Develop/implement radiation safety programs and procedures, including but not limited to: ALARA, respiratory protection, internal and external dosimetry, air sampling and monitoring, contamination control, radiological surveys and monitoring (including instrument selection and maintenance), radiation work permitting, and environmental monitoring.
    • Perform hazard assessments and define job safety requirements in work permits.
    • Participate in Process Hazards Analysis activities with multidiscipline teams to identify potential criticality, radiological, chemical, and fire/explosion hazards and determine potential consequence levels to support the Integrated Safety Analysis (ISA) process.
    • Consult with and advise operations, maintenance, and engineering personnel on the radiation protection or occupational safety and health impacts of new or proposed changes to processes, procedures, and facility designs/modifications.
    • Participate in design reviews.
    • Conduct surveillances, inspections, walk-downs, investigations, and audits/assessments of radiological material operations and unusual incidents to ensure compliance with approved procedures and safety bases.
    • Review and audit the safety and health programs for adequacy, compliance, and effectiveness.
    • Develop Health Physics/Health & Safety Technician Training and Qualification Plan and train employees.
    • Develop/deliver radiation safety training for all personnel.
    • Develop/revise safety postings and operator aids to implement administrative controls to ensure they are unambiguous, easily understood, and readily achievable.
    • Prepare and deliver recommendations to managers, safety committee representatives, and employees.
    • Provide support to the emergency response team.
  • Maintain professional demeanor and behavior at all times in all forms of communication.
  • Perform other duties as assigned by manager.

Level III:

    • Execute the core tasks and responsibilities, listed in the Job Profile Task/Responsibilities section of this document, with minimal supervision.
    • Provide ownership, responsibility, and accountability over technical scope involving the coordination of multiple individual contributors working in a specific area.

Level IV:

  • Lead the execution of the core tasks and responsibilities, listed in the Job Profile Task/Responsibilities section of this document, without close supervision and some latitude for independent judgment.
  • 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.
  • Shares knowledge related to industry best practices and standards with others across the team.

Job Profile Minimum Qualifications:

  • Bachelor’s degree in science (health physics, biology, etc.) and/or engineering (nuclear, chemical, mechanical, etc.) from an accredited college or university required.
  • Knowledge of the principles, theories and practices in the field of health physics and radiation safety, and in the implementation of programs associated with the use of byproduct, source or special nuclear materials in the areas of power reactor, nuclear fuel fabrication, medical, industrial, academic, decommissioning (material use or reactor operations), and/or Independent Spent Fuel Storage Installation (ISFSIs).
  • Level III: Typically, five years of experience in the health physics / radiation safety field required.
  • Level IV: Typically, ten years of experience in the health physics / radiation safety field required.
  • Experience developing written procedures to implement regulatory and code/standard requirements, and experience applying regulatory guidance.
  • Working knowledge of relevant industry codes, standards, and best practices for health physics, radiation surveying and monitoring, radiation safety training, ALARA best practices, and NRC requirements for nuclear facilities.
  • Understanding of NRC-regulated nuclear facility operation, ventilation systems, and respiratory protection to reduce worker exposure to radioactive airborne contamination, and oversight of safe handling of radiological materials.
  • Experience using MCNP, Microshield, or other computer codes and models/methods for dose assessments.

Location: 151 Lafayette Drive, Oak Ridge, TN 37830

Work Site Expectations: 5 days a week in office

Travel Expectations: up to 10% as needed

Hours: Standard office schedule are 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 III - $112,875 - $149,625/ Level IV - $139,125 - $186,375

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/ProfessionalDevelopment 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)

E-Verify Participation Link: E-Verify Participation Poster English and Spanish

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