Posted 2 months ago
Reactor Physicist
@ AtkinsRéalis
Mississauga, Ontario
Overview
AtkinsRéalis is hiring a Reactor Physicist for its Reactor Core Physics Department to support the design of new nuclear power plants and the operation and refurbishment of existing CANDU plants. The role performs reactor core calculations, runs and modifies reactor physics codes, and documents analyses. The posting states a hybrid working culture and a formal QA environment.
Responsibilities:
- Perform and supervise finite-core, kinetics, fuel-cycle and Monte Carlo calculations
- Develop and modify FORTRAN codes for reactor physics applications
- Document analyses in technical notes and present results
- Estimate schedules and assign work to meet deadlines
Requirements summary:
- Honours degree in Physics or Nuclear Engineering
- Minimum 5 years of relevant experience
- Experience with WIMS, DRAGON, RFSP or MCNP
- Strong FORTRAN programming and Linux/Windows skills
- Full commitment to a formal QA environment
Tools & skills
Source and dates
Employer career site / ATS feed · workday
- Employer posting date
- 2026-09-10
- First seen by our source
- 2026-10-08
- Source record updated
- 2026-10-19
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Seniority | Mid level |
| Department | Engineering |
| Experience | 5+ years |
| Hours per week | 40 (estimated) |
| Work setting | Office |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
| Languages | English |
| Education | Bachelor’s degree (required) |
| Fields of study | Physics, Nuclear Engineering |
| Perks mentioned | Flexible hours, Paid training |
Summary and details written by AI from the posting; the employer’s posting is the authority.
AtkinsRéalis
Saved company profile
Historical company information from a saved The Jobs API profile (LinkedIn/Crunchbase fields). It is not live-verified; figures may have changed. Missing values remain unknown.
Full company description
We are a world-class engineering services and nuclear organization. We connect people, data and technology to transform the world’s infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. ---
- LinkedIn followers
- 522,517
- People associated on LinkedIn
- 46,698
- Reported office locations
- 455 René-Lévesque Blvd W, Montreal, QC H2Z 1Z3, CA
- Business categories
- Construction
- Innovation Management
- Mining
- Infrastructure
- Transportation
- Energy
- Civil Engineering
- Other recorded names
- AtkinsRéalis
- Profile identifies a recruitment agency
- No
- Reported total investment
- 1,128,343,771
Currency and observation date were not supplied; this is not a current valuation or a funding round.
We are a world-class engineering services and nuclear organization. We connect people, data and technology to transform the world’s infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. ---
| Field | Value |
|---|---|
| Industry | Engineering Services |
| Company size | 10,001+ employees |
| Headquarters | Montreal, QC |
| Organization type | Public Company |
| Open jobs on Jobsy | 123 |
| View page |
Job Description
Candu Energy Inc. is looking for a Reactor Physicist to be a part of our Reactor Core Physics Department supporting the design of new nuclear power plants and the operation and refurbishment of existing CANDU nuclear power plants.
Your role:
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
Document analyses in technical notes and reports, and present results at meetings
Estimate, monitor schedules and assign work to meet completion date, perform varied work assignments effectively and respond quickly to changing project needs
Propose/develop approaches to be used on reactor physics tasks
Develop analysis basis plans
About you:
A Relevant honours degree from a university of recognized standing in Physics or Nuclear Engineering or equivalent;
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 and/or MCNP
Experience with DONJON and KENO codes is very desirable
Must be conversant with computer environments; proficiency in both Linux and WINDOWS environments is a strong asset
Proficiency in computer programming, especially FORTRAN, is 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 show initiative while working in a team environment
Ability to work to budget and schedule
Full commitment to working in a formal QA environment.
Reward & benefits
Explore the rewards and benefits that help you thrive – at every stage of your life and your career at AtkinsRéalis in Canada. Enjoy competitive compensation, employee recognition, and a brilliant range of flexible benefits you can tailor to your health, wellbeing, financial and lifestyle needs.
Make the most diverse opportunities for training and professional development to grow your skills and expertise. And take advantage of our hybrid working culture and generous time-off policies to balance a fulfilling career with your personal life. Be rewarded. Find out more.
About AtkinsRéalis
We're AtkinsRéalis, a world-class engineering services and nuclear organization. We connect people, data and technology to transform the world's infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. We're committed to leading our clients across our various end markets to engineer a better future for our planet and its people.
Additional information
AtkinsRéalis cares about your privacy. AtkinsRéalis and other subsidiary or affiliated companies of AtkinsRéalis (referred to throughout as “AtkinsRéalis”) are committed to protecting your privacy. Please consult our Privacy Notice on our Careers site to know more about how we collect, use, and transfer your Personal Data.
By submitting your personal information to AtkinsRéalis, you confirm that you have read and accept our Privacy Notice.
Appropriate accommodation will be provided upon request throughout the recruitment and hiring process as required by Company policy and the Accessibility for Ontarians with Disabilities Act (AODA).
Successful applicants will be notified about AtkinsRéalis’ accommodation policies at the time the employment offer is extended, and the information will be shared with new personnel during the onboarding process.
Worker Type
EmployeeJob Type
RegularAt 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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