Apply now

Posted 2 months ago

Senior Reactor Physicist

@ AtkinsRéalis

Mississauga, Ontario

Full-time10+ years experience
Apply now
SIGNALS

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

SenioritySenior
DepartmentEngineering
Experience10+ years
Manages peopleYes
Hours per week40 (estimated)
Work settingOffice
PositionMostly sitting
Physical demandsphysical low · computer high
LanguagesEnglish
EducationMaster’s degree (required)
Fields of studyNuclear 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

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.

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.

Similar jobs

  • Senior Reactor Physicist

    Mississauga, ON
    Full Time

    Candu Energy Inc.

    5+ YOECandidates need a master's degree or higher in physics or nuclear engineering, at least 5 years of relevant experience, and CANDU reactor physics experience. Strong problem-solving, communication and formal QA skills are required.

    WIMS, DRAGON, RFSP, DONJON, MCNP, FORTRAN

  • Junior Reactor Physicist

    Mississauga, ON
    Full Time

    AtkinsRéalis

    Candidates need a relevant honours degree in Physics or Nuclear Engineering, with reactor physics experience a strong asset. They must be proficient in FORTRAN programming, comfortable on Linux and Windows, and able to write technical reports and present to teams.

    FORTRAN, Linux, Windows

    Reactor Physicist

    Mississauga, ON
    Full Time

    AtkinsRéalis

    5+ YOECandidates need a relevant honours degree in Physics or Nuclear Engineering and at least 5 years of related experience. Experience with reactor physics codes such as WIMS, DRAGON, RFSP or MCNP, plus FORTRAN programming, is needed.

    WIMS, DRAGON, RFSP, MCNP, DONJON, KENO

  • Operational Technician

    Mississauga, ON
    Full Time

    Bora Pharmaceuticals Services Inc

    There are two openings , both of which are newly created positions and have been approved as part of the organization's staffing requirements; Support in other production areas as required; Experience and Skills

    Manufacturing Operator L1

    Mississauga, ON
    Full Time

    Bora Pharmaceuticals Services Inc

    There are three openings, all three of which are newly created positions and have been approved as part of the organization's staffing requirements; The Manufacturing Operator is responsible for executing manufacturing…

  • Warehouse associate- Day shift

    Mississauga, ON
    $19.50/hrContract

    Randstad Canada

    This role is an excellent opportunity to gain valuable experience and grow within a large-scale organization; - Able to clear criminal record check; - Excellent communication ability

    Fulfillment Associate

    Mississauga, ON
    $19.50/hrContract

    Randstad Canada

    Candidates need prior general warehousing experience, the ability to lift up to 50 lbs and stand for the full shift, and comfort using an RF scanner and pump truck. Occasional overtime must be acceptable.

    RF scanner, Pump truck

    Production Associate - night Shift

    Mississauga, ON
    $17.95/hrContract

    Randstad Canada

    - experience in manufacturing environment; • Work on production line as required; - Must have CSA-approved safety shoes/steel-toed boots

Locations & environments

Locations

All of CanadaRemote · Hybrid · On-site · Field

Pro tip: add remote jobs to widen your search.

Exclude locations

Workplace type

Company jobs in these results

These are this company’s jobs loaded in your current search. The company may have more openings.