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Salary
≈ $73k – $131k per year (Estimated)
Location
In office (Mississauga)
Seniority
Senior · 5+ years exp
Visa
Positions approved through LMIA in 12 months: 5
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 28, 2026. First seen by Alion on Nov 4, 2025. AtkinsRéalis scores B on the Alion truth index.

Overview
Company
Impact
Profile match
AtkinsRéalis is a Canadian professional services and project management company created when the engineering firm SNC-Lavalin, founded in Montreal in 1911, acquired the British consultancy Atkins in 2017 and adopted the combined name in 2023. It designs and manages infrastructure programmes across transport, water, buildings, energy and defence, and holds a substantial nuclear business through Candu Energy that services and builds heavy water reactors. Headquartered in Montreal and listed in Toronto, the group employs tens of thousands of engineers, planners and consultants across Canada, the United Kingdom, the Middle East and Asia Pacific.

Job Description

Are you looking for a company that works on major engineering projects all over the world? Do you want to make a difference by improving the daily lives of communities worldwide? Are you seeking to join an inclusive and diverse team that you can truly count on? You’ve come to the right place!

Come join us in reshaping the future with AtkinsRéalis. AtkinsRéalis is dedicated in engineering a better future for our planet and its people.

Our Reactor Core Physics Department at AtkinsRéalis/ Candu Energy is engaged in design and analysis work to support the design of new CANDU Nuclear Power Plants as well as supporting the operation and safety of the existing domestic and international CANDU plants. The Senior Reactor Physicist will work under specialist staff to assist in the development of advanced codes and methods and to perform technical analysis using up-to-date reactor physics codes, such as WIMS, DRAGON, RFSP and MCNP.

Location - Mississauga, ON

Your role within the team:

  • Perform and/or supervise the following calculations: Finite-reactor-core calculations, Kinetics calculations, Advanced-fuel-cycle calculations, Monte Carlo calculations.

  • Prepare inputs, run reactor physics computer codes

  • Develop, adapt and modify FORTRAN computer codes as required for specific applications (e.g., to implement new methods or perform new types of calculations)

  • Develop methodologies and perform reactor physics analyses to support design and commercial activities and document analyses in technical notes and reports, present results at meetings

  • Estimate, monitor schedules and assign work to meet completion dates Perform varied work assignments effectively and respond quickly to changing project needs

  • Propose/develop approaches to be used on reactor physics tasks as well as develop analysis basis plans

Why choose AtkinsRéalis as an employer?

Because we offer:

  • The opportunity to work on various major projects for internal and external clients.

  • An exciting environment where work-life balance is important.

  • A wide array of learning and development opportunities.

  • Competitive pay, flexible benefits, an employee share plan, and a defined contribution pension plan.

  • A work environment focused on health and safety.

The ideal candidate:

  • Masters degree or higher from a university of recognized standing in Physics or Nuclear Engineering or equivalent;

  • Experience with CANDU reactor physics

  • A minimum of 5 years of relevant experience (experience obtained in advanced degree programs will be considered for applicability against this requirement)

  • Experience with reactor physics codes such as WIMS, DRAGON, RFSP , DONJON and/or MCNP

  • Experience with nuclear data library creation

  • Experience with few energy group constants and uncertainty assessment

  • Proficiency in both Linux and WINDOWS environments is a strong asset as well as computer programming, especially FORTRAN, C++ are very desirable Excellent oral and written communication skills are required

  • Ability to work well under pressure and be flexible, i.e., must be able to perform varied work assignments effectively and respond quickly to changing project needs

  • Strong problem solving skills are essential, ability to work to budget and schedule and a full commitment to working in a formal QA environment.

Worker Type

Employee

Job Type

Regular

At AtkinsRéalis, we seek to hire individuals with diverse characteristics, backgrounds and perspectives. We strongly believe that world-class talent makes no distinctions based on gender, ethnic or national origin, sexual identity and orientation, age, religion or disability, but enriches itself through these differences.

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