Position: Nuclear Engineer (Neutronics Specialist) Location: Waterloo, Ontario (On site, five days per week) About CSMC Canadian Strategic Missions Corporation is developing advanced energy and aerospace technologies that include nuclear microreactors for space and extreme environments, quantum sensing platforms, and mission‑critical deep‑tech systems. We are hiring a Nuclear Engineer with strong neutronics and reactor physics expertise to join our reactor design team and help build the physics foundation of our micro‑modular reactor programs.

About the Role This is a hands‑on technical role in a fast‑moving workplace. You will develop high‑fidelity neutronics models, run transport and diffusion simulations, support multiphysics integration, and contribute to first‑of‑a‑kind reactor concepts.

Key Responsibilities Neutronics and Reactor Physics - Perform neutron transport and reactor physics simulations using Serpent2, OpenMC, MCNP, SCALE, DRAGON, MOOSE based solvers, or other neutronics and nodal diffusion codes - Build and maintain high‑fidelity core, lattice, reflector, and shielding models for microreactor concepts - Conduct reactivity coefficient evaluations, power distribution studies, burnup and depletion analysis, kinetics assessments, and control system behavior studies - Support core design optimization, fuel selection, reflector and shielding design, and neutronic performance trade studies Multiphysics and Safety Integration - 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 Nuclear Data and Verification - 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 IAEA benchmarks, 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 Qualifications Required Qualifications - 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, or the MOOSE suite - 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 Qualifications - 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 Employment Eligibility - Current legal authorization to work in Canada and ability to maintain valid work authorization for the duration of employment - Government‑of‑Canada security screening: ability to obtain and maintain Reliability Status or higher; provide at least five years of continuous, verifiable background history; willingness to undergo identity, employment, education, and criminal background checks - Foreign Influence & Foreign Affiliation Risk Assessment (FIRA): eligibility to undergo review of foreign citizenship(s), recent foreign residence, immediate family ties abroad, and foreign financial, business, or government affiliations - Controlled Goods & Export Control Eligibility: eligibility to access Controlled Goods under the Controlled Goods Program, and eligibility to access export‑controlled technical data under Canadian law; willingness to undergo additional screening if required - On‑site requirement: ability to work on site as required for access to secure and controlled workspaces Equal Opportunity Statement CSMC is an equal‑opportunity employer. All qualified applicants will receive consideration for employment without regard to race, religion, color, national origin, gender, age, disability, or any other protected characteristic.

📌 Nuclear Engineer (Neutronics Specialist) (Toronto)
🏢 CSMC
📍 Toronto