Systems Engineering Intern

This is a Full-time 16-month role commencing May 2026

For this role in Oakville, Ontario, The hourly wage range for this position isCAD $25 to $35 per hour. The actual wage offered will be determined based on factors such as education, experience, knowledge, skills, abilities, applicable market data for the work location, and internal equity considerations.

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 Systems Engineering Intern, under the direction of the Systems Engineering Manager, supports the development, integration, and coordination of Terrestrial Energys IMSR technology. This role is critical in assisting with systems-level definition, requirements management, interface coordination, and documentation across multidisciplinary engineering teams. The successful candidate will gain hands-on experience applying systems engineering principles in a highly regulated advanced nuclear technology environment, while contributing meaningfully to the Reactor Pilot Program and associated development activities.

Other Responsibilities Include:

Systems Engineering

• Support development, maintenance, and organization of system requirements for IMSR systems and subsystems
• Assist with requirements decomposition, allocation, and traceability across system, subsystem, and component levels
• Help maintain system descriptions, functional breakdowns, and system architecture documentation
• Support identification, documentation, and tracking of system assumptions, constraints, and design decisions
• Assist with configuration management and change impact assessments from a systems perspective

Integration & Interfaces

• Support identification and documentation of interfaces between engineering disciplines (mechanical, electrical, I&C, safety, licensing)
• Assist in maintaining Interface Control Documents (ICDs) and interface registers
• Participate in cross-functional technical meetings and support follow-up on actions and interface issues
• Help track integration risks and dependencies across systems and subsystems

Verification & Validation

• Assist in developing and maintaining requirements verification matrices
• Support definition of verification methods (analysis, inspection, test, demonstration) for system requirements
• Help organize verification evidence and documentation to support future testing and validation activities
• Support systems-level thinking aligned with the V-model engineering approach

Documentation & Reporting

• Prepare and update technical documentation including system summaries, requirement listings, and decision logs
• Assist in preparing figures, block diagrams, and presentation material for internal design reviews
• Maintain organized records within document control and configuration management systems
• Support adherence to engineering processes and quality requirements

Collaboration

• Work closely with Systems Engineering, Design Engineering, Safety, Licensing, and Project Management teams
• Participate in design reviews and technical discussions to gain exposure to integrated reactor development
• Interface with engineers across multiple disciplines to support coordinated system development
• Contribute to continuous improvement of systems engineering tools and practices

Core Competencies:

• Written and verbal communication
• Project and task coordination
• Technical documentation practices
• Quality and compliance awareness
• Digital engineering tools
• Team collaboration and support
• Analytical and problem-solving skills
• Data-driven decision support
• Initiative and willingness to learn
• Planning and organizational skills
• Adaptability to change

Requirements:

Education

• Currently enrolled in a Bachelors or Masters degree program in: Mechanical Engineering, Nuclear Engineering, Systems Engineering, Electrical Engineering, Chemical Engineering, Or a related engineering discipline.

Experience

• Academic or co-op experience in engineering design, analysis, or technical documentation
• Exposure to systems engineering concepts through coursework, projects, or internships

Technical Skills

• Strong analytical and problem-solving skills
• Understanding of systems thinking and interdisciplinary engineering principles
• Proficiency with Microsoft Office tools (Excel, Word, PowerPoint)
• Ability to read and understand technical documentation and engineering drawings
• Familiarity with requirements management tools or modeling tools is an asset

Professional Skills

• Strong attention to detail and organization
• Clear technical writing and documentation skills
• Ability to manage multiple tasks and meet deadlines
• Willingness to learn and take initiative
• Effective communication skills within a technical team environment

Assets:

• Coursework or experience in systems engineering, requirements management, or project engineering
• Familiarity with the V-model of systems engineering
• Exposure to regulated industries (nuclear, aerospace, energy, medical, etc.)
• Familiarity with tools such as DOORS, Jama, Polarion, SysML, or similar (academic exposure acceptable)
• Interest in advanced reactor technologies or clean energy systems

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 CANADA 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:

-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