Reactor Physics Intern (Nuclear Engineering)

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 Energy’s IMSR, there is today a unique and compelling opportunity to participate in the execution of the company’s 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 Company’s 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

Master’s 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 Energy’s 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 [email protected]