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Mechanical Engineer

Terrestrial Energy

Terrestrial Energy

Oakville, ON, Canada
Posted on Tuesday, June 11, 2024

Interested in helping us transform thermal and electric energy?

Become a part of the leading Generation-IV nuclear plant development team.

Terrestrial Energy is developing for near-term commercial operation, a zero-emissions cogeneration plant for global industry using its proprietary Integral Molten Salt Reactor (IMSR) fission technology in an innovative, small and modular plant design. The IMSR is a non-Light Water Reactor of the Generation IV class that operates at the high temperature required for broad industrial relevance with transformative economic potential. The IMSR plant is capable of grid-based electric power generation and industrial cogeneration in many energy-intensive industries, including petrochemical and chemical synthesis for hydrogen and ammonia production. The IMSR plant offers a near 50 percent improvement in efficiency of electric power generation compared to Light Water Reactor nuclear plants. Its industrial cogeneration capability delivers to today’s markets industrial competitiveness, security of energy, and zero-emissions industrial production. The IMSR plant’s use of existing industrial materials, components, and fuels supports its near-term deployment, setting the stage for a rapid global decarbonization of the primary energy system. To execute this plan, we are now looking to add talented people to the team, each of whom will:

  • improve our team by adding diverse perspectives and innovative ways of problem solving
  • have demonstrated exceptional results in engineering projects
  • be a team player with the ability to collaborate closely and interact with other groups
  • be flexible and adaptable to change
  • have skillset and experience that relate to the following role:

The Mechanical Engineer, under the direction of the Mechanical Engineering Manager, is primarily responsible for design and development of their assigned mechanical systems through the Detailed Engineering phase. Other responsibilities include:

  • Prepare calculations, analyses and assessment documents for the development of the system and equipment design
  • Prepare the system classification, design requirements and design summary report in accordance with applicable design guides, procedures, and codes and standards
  • Participate in and contribute to design reviews
  • Communicate and work with various technical disciplines to understand system design(s) and interfacing requirements
  • Coordinate and interface with the plant layout lead in the development of 3D CAD for the responsible mechanical systems
  • Contribute to timely resolution of mechanical design challenges and address risks
  • Coordinate with, and support work of, other disciplines
  • Conduct presentations to interdisciplinary team and external stakeholders
  • Interface with external vendors, design agencies, technical experts, clients and regulators as required
  • Oversee and collaborate with external vendors, carry-out vendor deliverable reviews
  • Provide input to schedules, cost estimates
  • Responsible for ensuring that the budget, timing, and quality of engineering work is executed as required
  • Report progress of project work on a regular basis
  • Mentor junior team members
  • Other duties as assigned

Core Competencies

  • Mechanical Engineering
  • Communication
  • 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


  • Post-secondary degree or diploma in Mechanical Engineering, or alternate degree in a related field
  • Canadian PE Certification, or eligible to obtain a Canadian PE Certification
  • Minimum of 8 years of work experience in the design of mechanical systems, preferably within the nuclear industry
  • Demonstrated success in project delivery and the execution of mechanical design methods
  • Expert or working knowledge of nuclear pressure boundary codes including ASME Section III Division 1, CSA N285.0 and ASME B31.1
  • Strong problem identification and problem resolution skills
  • Flexibility to adjust to shifting priorities and deadlines
  • Exceptional interpersonal and communication (both written and verbal) skills


  • Expert or working knowledge of nuclear pressure boundary code ASME Section III Division 5
  • Working knowledge of ANSYS Mechanical, Creo Parametric, or other 3D modelling and FEA software
  • Proficient in CSA nuclear standards such as N285, N286, N299
  • Project Management experience
  • Industry experience in designing systems and components subject to extreme environmental conditions
  • Design experience with reactor shutdown or cooling systems
  • Qualified as per ASME Section III Appendix XXIII and experienced in Design Specifications, Overpressure Protection Reports, and Design Reports


  • Extended Healthcare Plan (Medical, Disability, Dental & Vision)
  • Paid Vacation Days plus 5 additional paid days
  • EAP Programs available to you and your family
  • Hybrid work model (2 days in office per week)
  • $500 Wellness Subsidy
  • Annual Performance Review
  • Paid United Way Volunteer Days – A chance to give back!
  • Career development opportunities

Please submit a Resume and Cover Letter

TEI Values diversity in its workforce and encourages applications from all qualified individuals. TEI is an equal opportunity employer.

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