Posted 2 months ago
Senior Reactor Physicist
@ AtkinsRéalis
Mississauga, Ontario
Overview
AtkinsRéalis is hiring a Senior Reactor Physicist for its Reactor Core Physics group to support design of new CANDU plants and the operation and safety of existing domestic and international CANDU plants. The role is full-time, with a hybrid working culture and generous time-off policies, and the posting lists competitive compensation and flexible benefits.
Responsibilities:
- Perform, supervise and review reactor physics calculations
- Develop and modify FORTRAN codes for specific applications
- Document analyses in technical notes and reports
- Advise clients on reactor physics issues and solutions
- Supervise junior staff and lead a multidisciplinary analysis team
Requirements summary:
- Master's degree or equivalent in nuclear engineering
- 10 to 15 years of relevant experience
- Extensive experience with WIMS, DRAGON, RFSP and MCNP
- Proficiency in Linux and Windows, and FORTRAN programming
- Excellent oral and written communication skills
- Full commitment to a formal QA environment
Tools & skills
Source and dates
Employer career site / ATS feed · workday
- Employer posting date
- 2026-09-09
- First seen by our source
- 2026-10-08
- Source record updated
- 2026-10-18
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Seniority | Senior |
| Department | Engineering |
| Experience | 10+ years |
| Manages people | Yes |
| Hours per week | 40 (estimated) |
| Work setting | Office |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
| Languages | English |
| Education | Master’s degree (required) |
| Fields of study | 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
Overview
Candu Energy Inc. is looking for a Senior Reactor Physicist to be a part of our team in the Reactor Core Physics 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.
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 analysis in technical notes and reports, and present results at meetings Interface with other groups/projects as required
- Review technical documents Supervise junior staff
- Estimate, monitor schedules and assign work to meet completion dates Interface with clients and projects to assess reactor physics related issues confronting their projects/stations and advising on potential solutions
- Prepare and/or review work proposals for internal and external clients
- Perform varied work assignments effectively and respond quickly to changing project needs
- Establish required resources for client work
- Propose/develop approaches to be used on reactor physics tasks
- Develop analysis basis plans
- Lead work and liaise with a multidisciplinary analysis team including project management
About you:
- Master’s degree or equivalent in Nuclear Engineering from a university of recognized standing
- A minimum of 10 to 15 years of relevant experience or combination of experience and advanced education
- Extensive experience with reactor physics codes WIMS, DRAGON, RFSP and MCNP Experience with DONJON and KENO computer codes.
- 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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