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Reactor Engineer Jobs in Ontario (NOW HIRING)

Mirion Technologies

Applications Engineer

Cambridge, ON · On-site

Review reactor core layouts, sensor placement requirements, and interface specifications to ... Engineering Collaboration: * Work closely with design engineering, manufacturing, and quality teams ...

Mirion Technologies

Mechanical Engineer

Cambridge, ON · On-site

The Mechanical Engineer will be responsible for the design, analysis, and creation of documentation ... These instruments are critical for monitoring and controlling reactor core conditions--neutron flux ...

CSMC

$150 - $200/hr

This role provides leadership across reactor physics, thermal‑hydraulics, systems engineering, safety analysis, and regulatory readiness, while supporting early CNSC engagement and licensing ...

CSMC

Nuclear Thermal-Hydraulics Engineer

Waterloo, ON · On-site

Perform thermal-hydraulic and system-level analyses for reactor designs. * Develop models using ... D. in Nuclear Engineering, Mechanical Engineering, or related discipline. * 2+ years of relevant ...

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Showing results 1-20

All JobsReactor Engineer JobsReactor Engineer Jobs in Ontario

Reactor Engineer information

See Ontario salary details

$29K

$89.6K

$177.5K

How much do reactor engineer jobs pay per year?

As of Aug 11, 2026, the average yearly pay for reactor engineer in Ontario is $89,643.00, according to ZipRecruiter salary data. Most workers in this role earn between $52,000.00 and $121,000.00 per year, depending on experience, location, and employer.

What is a reactor engineer?

Reactor Engineers are professionals who design, operate, and maintain nuclear reactors. They are responsible for ensuring the safe and efficient functioning of reactors used for power generation, research, or medical purposes. Their work involves monitoring reactor systems, conducting safety assessments, and developing procedures to prevent accidents. Reactor Engineers also analyze reactor performance data and collaborate with other engineers and scientists to optimize reactor operations.

What are some common challenges faced by reactor engineers during routine operations and how are they addressed?

Reactor Engineers often encounter challenges such as maintaining reactor stability, troubleshooting instrumentation issues, and ensuring compliance with strict safety protocols. These challenges are typically managed through continuous monitoring, collaboration with multidisciplinary teams (including safety, operations, and maintenance personnel), and adherence to established procedures. Proactive communication and regular training enable Reactor Engineers to respond effectively to unexpected events and maintain optimal reactor performance.

What are the key skills and qualifications needed to thrive as a reactor engineer, and why are they important?

To thrive as a Reactor Engineer, you need a solid background in nuclear engineering, reactor physics, and safety protocols, typically supported by a degree in nuclear engineering or a related field. Familiarity with simulation software, reactor monitoring systems, and safety certification such as Fundamentals of Engineering (FE) or Professional Engineering (PE) is often required. Strong analytical thinking, attention to detail, and effective communication skills help you solve complex technical problems and work within multidisciplinary teams. These skills ensure the safe, efficient, and regulatory-compliant operation of nuclear reactors, which is critical for both safety and energy production.

What is the difference between Reactor Engineer vs Nuclear Engineer?

AspectReactor EngineerNuclear Engineer
CredentialsBachelor's in Nuclear Engineering or related field; often requires licensing or certificationBachelor's or higher in Nuclear Engineering; may also require licensing
Work EnvironmentDesign, operate, and maintain nuclear reactors, often in power plants or research facilitiesResearch, develop, and improve nuclear systems, including reactors and radiation safety
Industry UsagePrimarily in power generation, naval propulsion, and research reactorsResearch institutions, government agencies, and industry R&D

Reactor Engineers focus on the operation and safety of nuclear reactors, ensuring they run efficiently and safely. Nuclear Engineers have a broader scope, including research, development, and design of nuclear systems. Both roles require similar educational backgrounds and certifications, but Reactor Engineers are more hands-on with reactor operation, while Nuclear Engineers often work on innovation and system improvements.

What are popular job titles related to Reactor Engineer jobs in Ontario? For Reactor Engineer jobs in Ontario, the most frequently searched job titles are:
What job categories do people searching Reactor Engineer jobs in Ontario look for? The top searched job categories for Reactor Engineer jobs in Ontario are:
Reactor Engineer jobs near you
Infographic showing various Reactor Engineer job openings in Ontario as of August 2026, with employment types broken down into 82% Full Time, 13% Part Time, and 5% Contract. Highlights an 86% Physical, 5% Hybrid, and 9% Remote job distribution, with an average salary of $89,643 per year, or $43.1 per hour.

Engineering Manager, Reactor Engineering

SNC-Lavalin

Mississauga, ON • On-site

Full-time

Re-posted 12 days ago

Job description

Job DescriptionOverview

AtkinsRealis is one of Canada's largest private sector nuclear engineering groups. We have been providing a wide range of services to the nuclear industry in Canada and around the world since for more than 60 years.We are proud to be the steward of Canadian CANDU nuclear technology.

Your role
  • Reporting to the Director of Engineering Services, the Engineering Manager, Reactor Engineering is responsible for the execution and technical leadership of engineering services in support of domestic and international operating CANDU reactors.
  • The Engineering Manager works closely with the Director of Engineering Services, Project Managers and Project Directors, Engineering Excellence Management, Engineering Managers from other mandates, and external clients and stakeholders to ensure the safe, high-quality, and well-coordinated delivery of engineering services.
  • They will manage a team of approximately 25 people.
  • Be accountable for the technical delivery and overall quality of assigned engineering scopes in the electrical, instrumentation and controls discipline.
  • Provide technical direction and oversight to ensure deliverables meet contract requirements, client expectations, applicable nuclear codes and standards, and the company quality assurance program.
  • Ensure engineering activities are planned and executed in accordance with approved QA programs, procedures, and regulatory requirements.
  • Coordinating the design interface between the NSP and BOP portions of the NPP.
  • Identify, assess, and manage technical issues and risks within assigned scope, escalating as appropriate.
  • Review and approve engineering documents and drawings in accordance with delegated authority.
  • Assign and prioritize work based on individual qualifications, experience, and competency to support safe and efficient execution.
  • Set and manage team priorities to align engineering objectives with overall project goals.
  • Establish and promote a working culture that enables Engineering Services to achieve its vision by reinforcing nuclear safety, quality, knowledge sharing, innovation, and respect across multidisciplinary teams.
  • Provide performance feedback, observations, and coaching to support a continuous learning culture.
  • Support the Director of Engineering Services in defining engineering scope, deliverables, future resource needs, and technical inputs for proposals and anticipated work.
  • Support effective technical integration across disciplines and interfaces by working collaboratively with Engineering Services, Engineering Excellence, and other project mandates.
  • Identify emerging technical demands and capability gaps based on project execution, client direction, and industry trends, and raise these to Engineering Services leadership.
  • Develop and maintain strong technical relationships with client side counterparts to support current delivery and informed discussion of future needs.
  • Develop, implement, and maintain tools, processes, and standard practices to improve engineering efficiency, effectiveness, consistency, and quality.
  • Identify opportunities for innovation in engineering analysis methods, design approaches, workflows, and digital tools.
  • Escalate significant technical, regulatory, or delivery risks to the Director of Engineering Services and the Project Manager/Project Director, as required.
About you
  • Bachelor's degree in Mechanical or Structural Engineering or related discipline and registration as a Professional Engineer (P.Eng.) in Ontario.
  • 10+ years of experience in Reactor Engineering and at least 3-5 years of experience leading engineering scopes and technical teams on complex projects.
  • 5+ years nuclear and/or CANDU technology experience is an asset.
  • Proven ability to mentor and develop engineers and designers.
  • Ability to work effectively and balance conflicting priorities.
  • Willingness to travel to project or client sites as required.
Rewards & benefits

Explore the rewards and benefits that help you thrive - at every stage of your life and your career at AtkinsRealis 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 of 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 AtkinsRealis

We're AtkinsRealis, 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

AtkinsRealis cares about your privacy. AtkinsRealis and other subsidiary or affiliated companies of AtkinsRealis (referred to throughout as "AtkinsRealis") are committed to protecting your privacy. Please consult ourPrivacy Noticeon our Careers site to know more about how we collect, use, and transfer your Personal Data.

By submitting your personal information to AtkinsRealis, 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 AtkinsRealis' accommodation policies at the time the employment offer is extended, and the information will be shared with new personnel during the onboarding process.

Worker TypeEmployeeJob TypeRegular

At AtkinsRealis, 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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