Mechanical Engineering Internship - Summer 2027

X-energy; Maryland; On-site; USD 34,000 - 55,000; Part time

Job summary

X-energy invites engineering interns to contribute to real reactor design and licensing efforts under guided supervision. You will work on projects alongside engineers and scientists, assisting with analyses, data collection, and documentation.

Based in Gaithersburg, MD, this 10-week, on-site program runs June–August 2027 with standard office hours and a concrete compensation framework. Applicants should be current students or recent graduates in mechanical engineering.

Qualifications

• Enrollment in or recent completion of a mechanical engineering degree.
• Hands-on knowledge in mechanical design and hardware development.
• Experience with CAD/PLM software and design documentation.

Responsibilities

• Support active engineering projects related to intern area of study.
• Assist with day-to-day technical and operational needs of the team.
• Conduct research, gather data, and synthesize findings for design work.
• Help develop reports, documentation, and presentations for stakeholders.
• Organize project files and ensure traceability and quality.

Skills

Mechanical design

CAD/PLM

Thermodynamics

Structural analysis

CFD analysis

Piping & HVAC

MS Office

Curiosity & collaboration

Education

B.S. in mechanical engineering or related field

Tools

SolidWorks

UG/NX

Pro-Engineer

Teamcenter

Windchill

Job description

X-energy LLC conducts a thorough recruiting process and will never issue offers without interview to discuss qualifications and responsibilities.

We will never ask you to provide payment information as part of the recruiting process.

Job Description

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 projects and analyses within your area of study, contributing to work that advances real reactor design and licensing efforts.
• Assist with the day-to-day technical and operational needs of your team.
• Conduct research, gather technical data, and synthesize findings to inform ongoing design and analysis initiatives.
• Help develop reports, technical documentation, and presentations that communicate results to internal stakeholders.
• Organize and maintain project files, technical records, and documentation to support traceability and quality.
• Participate actively in team meetings, design reviews, and brainstorming sessions - bringing ideas, asking questions, and offering perspective.

What You'll Bring

Current enrollment in - or recent completion of - a degree in mechanical engineering or a closely related field from an accredited institution.

• Academic or hands-on knowledge in a minimum of one of the following areas:
• Mechanical Design Designing and developing mechanical or fluid systems, assemblies, or components. One plus years of demonstrated hands-on experience developing and delivering hardware or manufacturing processes in a production environment is required. May include industry internship experience, hobby, or participation in collegiate engineering projects such as: Formula SAE, Baja SAE, Design Build Fly, Rocket Club, etc. Hardware ownership including manufacturing and testing oversight.
• Use of Computer-Aided Design (CAD) and product lifecycle management (PLM) software.
• Thermodynamics Use of 1D flow-solvers performing heat/energy and mass balance (e.g., RELAP, Flownex, NPSS, SINDA/FLUINT, Flomaster, or similar). E.g. UG/NX, SolidWorks, Pro-Engineer, Teamcenter, Windchill, or similar.
• Structural Analysis Analytical experience with structural analysis hand calculations and structural FEA software programs (e.g., ANSYS, ABAQUS, NASTRAN, FEMAP, CAESAR, ROHR, LS-DYNA, PIPESTRESS).
• Thermal Hydraulics Use of Computational Fluid Dynamics (CFD) analysis codes (e.g., STAR-CCM+, Fluent, or similar).
• Mechanical Process Equipment Piping, Ducting, HVAC, Fire Suppression, Pumps, Valves.
• Proficiency with the Microsoft Office Suite (Outlook, Word, Excel, PowerPoint).
• Curiosity, initiative, and a collaborative mindset - you're eager to learn and ready to contribute.

Application Requirements

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: 9801 Washingtonian Blvd, Gaithersburg, MD

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.

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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 [e-mail]. Whether a requested accommodation would create an undue hardship will be determined based on the facts of each particular case.