Reactor Physics Intern (Nuclear Engineering)

Company: Terrestrial Energy
Location: Charlotte
Posted on: February 17, 2026

Job Description:

Job Description Job Description Salary: This is a Full-time 16-month role commencing May 2026 Come join us at Terrestrial Energy, a US developer of advanced, Generation IV nuclear reactors. We are growing our workforce to develop and deploy our Integral Molten Salt Reactor (IMSR) small modular nuclear plant to provide cost-competitive, clean firm heat and power to industry. The Company has recently completed a merger creating a publicly listed operating company (NASDAQ IMSR), to secure the capital resources for our next growth phase. With the current alignment of US Federal and State government, as well as industry interest in Small Modular Reactor (SMR) and advanced reactor technologies such as Terrestrial Energys IMSR, there is today a unique and compelling opportunity to participate in the execution of the companys growth business plan. The Company is building a team of high-performing business professionals and leaders in engineering, R&D, product management and business development areas at our Charlotte, North Carolina headquarters and future project sites. We are looking for talented individuals who can help build the organization, processes, and goal-orientated corporate culture to lead the company in our expansion. We are seeking people who: Have US market experience and perspectives bringing good judgement and innovative approaches to problem solving and business plan execution. Have demonstrated exceptional performance in past engineering projects. Offer exceptional leadership and team building capabilities. Have a deep understanding of the requirements for advanced reactor development. Can assist in the creation of the discipline and organized company structure, and contributed to a culture of excellence, necessary for the development and deployment of the Companys IMSR plant. Can thrive in a fast growing and opportunity business environment, and are capable of flexibility and adaptability at a time of organizational change. Have the specific skillset and experience for the following role: The Reactor Physics Intern, under the direction of the Physics Manager, is primarily responsible for performing reactor physics analyses and design assessments using reactor physics computer codes and analytical techniques. Other Responsibilities Include: Perform sensitivity analyses of postulated design concepts and options for reactivity control and power regulation Programming in MATLAB and scripting of complex algorithms within both a WINDOWS and LINUX environment Analyze graphite performance and graphite structure in a high radiation environment of a molten salt reactor Communicate and work with various technical disciplines to understand system design(s) and interfacing requirements Prepare written reports of assessments Exposure to nuclear design concepts, principles, regulations, codes and standards. Core Competencies: Nuclear engineering Reactor physics Programming Skills Data Analysis and Modeling Developing and reporting in an advanced digital engineering program structure Critical Thinking Decision Making Leadership Planning and Organizing Problem Solving Results Orientation Team player with the ability to collaborate and interact with other groups Flexible and adaptable to change Requirements: Education Masters degree in Nuclear Engineering or Engineering Physics (either currently enrolled or recent graduate) Technical Skills Proficiency with Microsoft Office tools (Excel, Word, PowerPoint) Some knowledge of state-of-the-art Monte Carlo calculation computer codes (such as MCNP, SERPENT and SCALE) Proficient or working knowledge in MATLAB Professional Skills Strong analytical and problem-solving skills Flexibility to adjust to shifting priorities and deadlines Strong attention to detail and organization Effective communication skills within a technical team environment Assets: Work or intern experience in physics, with focus in reactor physics. Experience in deterministic codes Experience in Nuclear Power Experience in Radiation Protection Knowledgeable in molten salt fueled nuclear reactors and graphite moderator Benefits: Mentoring/Coaching with Senior Employees/Leaders Collaborative and supportive work environment Opportunities to network across departments Hands-on experience with real projects Please submit a Resume, Cover Letter, and Transcripts (Unofficial copies are acceptable at this stage.) Candidates must be legally authorized to work in USA without the need for sponsorship for employment visa status. Terrestrial Energy requires that the successful candidate be able to access and use information subject to U.S. Export Control Laws, which mandate all citizenships (including dual citizenships) be from the U.S. Department of Energys List of Generally Authorized Countries (10 CFR Part 810 Appendix A and can be found here: eCFR :: Appendix A to Part 810, Title 10 Generally Authorized Destinations unless a specific authorization from the U.S. Department of Energy is obtained or unless you are a U.S. citizen, U.S. national, U.S. permanent resident, or protected individual under the U.S. Immigration and Naturalization Act (8 U.S.C. 1324b(a)(3)). Additional information can be found here: https://www.energy.gov/nnsa/10 -cfr-part-810. Terrestrial Energy Inc. is an equal opportunity employer and does not discriminate on the basis of any legally protected status or group. We encourage applications from all qualified individuals. If you require accommodation during the application or interview process, please advise us as soon as possible so appropriate arrangements can be made. If you require technical support in a format that is accessible to you, please contact Accessibility@terrestrialenergy.com

Keywords: Terrestrial Energy, Columbia , Reactor Physics Intern (Nuclear Engineering), Engineering , Charlotte, South Carolina