Nuclear Engineer (Neutronics Specialist)

• Work with thermal hydraulics engineers on coupled neutronics and thermal hydraulics analysis
• Provide neutronics inputs for safety analysis, transient behavior, and extreme environment performance assessments

• Process and interpret nuclear data libraries including ENDF B, JEFF, and JENDL
• Perform sensitivity and uncertainty analysis using tools such as SCALE SAM or TSUNAMI
• Conduct benchmark comparisons including ICSBF, Serpent benchmarks, MCNP benchmarks, and critical experiments

Documentation and Communication

• Prepare technical reports, calculation packages, and design documentation suitable for regulated and auditable environments
• Present findings in internal design reviews and to external stakeholders

• Bachelor’s, Master’s, or PhD in Nuclear Engineering, Engineering Physics, Reactor Physics, or a related field
• At least two years of relevant experience in industry, research, or graduate level work
• Demonstrated experience with at least one major neutronics code including OpenMC, Serpent2, MCNP, SCALE, DRAGON, the MOOSE suite, or other named neutronics and nodal diffusion codes
• Strong programming and automation skills in Python, MATLAB, or similar tools
• Solid understanding of reactor physics fundamentals including cross sections, transport theory, diffusion theory, burnup, kinetics, and reactivity feedback
• Ability to produce clear and defensible technical documentation

Nice to Have

• Experience with microreactors, space reactors, or fast spectrum systems
• Experience with multiphysics coupling such as OpenMC MOOSE or Serpent CFD workflows
• Familiarity with nuclear safety analysis, extreme environment reactor design, or shielding analysis
• Experience with high performance computing environments
• Knowledge of CSA N286 or N299, NQA 1, or other regulated quality frameworks

You will work on first of its kind microreactor systems for space and extreme environments.

You will help build foundational reactor physics capability in a high growth deep tech company.

You will collaborate with engineers across nuclear, aerospace, quantum, and AI.

You will have meaningful ownership, a flat structure, and the opportunity to grow with a mission driven team.

CSMC works with highly sensitive nuclear, defence, and aerospace related technologies.

As a result, all CSMC positions require eligibility for federal security screening and export ‑ control compliance.

These requirements are considered Bona Fide Occupational Requirements (BFORs) under applicable human ‑ rights legislation.

To be eligible for employment at CSMC, candidates must be able to meet ALL of the following criteria:

Current Legal Authorization to Work in Canada

• Currently legally authorized to work in Canada
• Able to maintain valid work authorization for the duration of employment

• Able to obtain and maintain Reliability Status or higher
• Able to provide at least 5 years of continuous, verifiable background history
• Willing to undergo identity, employment, education, and criminal background checks

Foreign Influence & Foreign Affiliation Risk Assessment (FIRA)

CSMC works with controlled nuclear and defence technologies, and candidates must be eligible to undergo a Foreign Influence and Foreign Affiliation Risk Assessment, which may include review of:

• Foreign citizenship(s)
• Recent foreign residence
• Immediate family ties abroad
• Foreign financial, business, or government affiliations

• Eligible to access Controlled Goods under the Controlled Goods Program (CGP)
• Eligible to access export ‑ controlled technical data under Canadian law
• Willing to undergo additional screening if required

• Able to work on ‑ site as required for access to secure and controlled workspaces.

These requirements are regulatory in nature and are necessary to ensure compliance with federal law and the secure handling of sensitive technologies