Nuclear Criticality Safety Internship- Summer 2027

Job Description

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, 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 This role is responsible for supporting professional employees working in an organizational function related to the Intern's area of study. Depending on the internship assignment, the intern may work alongside engineers, scientists, or industry professionals to contribute to various projects related to their area of study. Under guided supervision, interns will assist with various projects and tasks, contributing to the organization's goals while learning from experienced professionals in the field. Please note: This is a pipeline requisition for anticipated Summer 2027 internship openings. We accept and review applications on a rolling basis, and we extend offers as individual positions are finalized and specific team hiring needs are confirmed. Submitting an application places you in consideration for upcoming opportunities as they open.

What You'll Do

• Support active engineering projets and analyses within your area of study, contributing to work that advances TRISO-X fuel fabrication projects.
• Provide support for day-to-day departmental or team operations.
• Participate in brainstorming sessions, meetings, and project discussions offering input and feedback when appropriate.
• Attend team meetings and contribute ideas and suggestions to enhance operational efficiency or project outcomes.
• Help organize and maintain project files, documents, and records.
• Conduct research and gather information for ongoing initiatives and projects.
• Help prepare reports, presentations, or other materials as needed.

What You'll Bring

• Current enrollment in — or recent completion of — a bachelor's degree in nuclear , mechanical, chemical, civil, engineering or a closely related field from an accredited institution.
• Proficiency in Microsoft Office Suite (Outlook, Word, Excel, PowerPoint).
• Curiosity, initiative, and a collaborative mindset — you're eager to learn and ready to contribute.
• Academic or hands-on knowledge in a minimum of one of the following areas:
• Experience using SCALE, MCNP, or other NCS computer codes and models to demonstrate subcriticality.
• Historical accident analysis
• Validation methodologies
• Safety basis evaluations that identify and document NCS limits and controls.

Application Requirements

Along with your resume, please submit at least one letter of recommendation. Letters should come from a professor, academic advisor, employer, or professional mentor who can speak directly to your qualifications, work ethic, and potential.

Program Details

• Location: 151 Lafayette Drive, Oak Ridge, TN 37830
• Work Site Expectations: Fully on-site, 5 days per week
• Program Length: 10-week program (anticipated June–August 2027; exact dates to be confirmed)
• Hours: Standard office hours, 8:00 AM–5:00 PM ET, Monday–Friday

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. A reasonable estimate for this position at the level of experience required is: $25/hour for undergrad; $40/hour for graduate.

Position Job Classification

Part time - Non-Exempt

X-energy is delivering the next generation of carbon-free energy by reinventing nuclear power. We believe in leaving a cleaner planet for our children and grandchildren, while continuing to provide sufficient and affordable power to sustain growing populations around the world. That is why we have reinvented nuclear power, with a unique combination of proven technologies and new innovations, to meet our current and future needs. Watch our Anthem here

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. Equal Employment Opportunity Posters X-energy does not discriminate in employment against qualified individuals on the basis of a disability, and understands its obligation to make reasonable accommodation for individuals with physical or mental impairments that qualify as a disability under the ADA and ADAAA, unless the accommodation would impose an undue hardship on the company. It is an applicant’s or employee’s responsibility to participate in this interactive process by seeking an accommodation, assisting X-energy in reviewing accommodation alternatives and providing medical certification of the need for an accommodation. Any applicant or employee who wishes to seek an accommodation under this policy should contact the Human Resources Department via email at View email address on click.appcast.io. Whether a requested accommodation would create an undue hardship will be determined based on the facts of each particular case.