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Posted 2 months ago

Reactor Physicist

@ AtkinsRéalis

Mississauga, Ontario

Full-time5+ years experience
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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

SeniorityMid level
DepartmentEngineering
Experience5+ years
Hours per week40 (estimated)
Work settingOffice
PositionMostly sitting
Physical demandsphysical low · computer high
LanguagesEnglish
EducationBachelor’s degree (required)
Fields of studyPhysics, Nuclear Engineering
Perks mentionedFlexible 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. ---

FieldValue
IndustryEngineering Services
Company size10,001+ employees
HeadquartersMontreal, QC
Organization typePublic Company
Open jobs on Jobsy123
LinkedInView page
Job description

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.

Find out more.

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

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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