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 is CAD $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 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 Systems Engineering Intern, under the direction of the Systems Engineering Manager, supports the development, integration, and coordination of Terrestrial Energy’s 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.

• 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

• 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

• 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…