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Senior Process Systems Engineer

Job in Mississauga, Ontario, Canada
Listing for: AtkinsRéalis
Full Time position
Listed on 2026-02-28
Job specializations:
  • Engineering
    Systems Engineer, Electrical Engineering, Mechanical Engineer, Engineering Design & Technologists
Job Description & How to Apply Below
Overview  Atkins

Réalis 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 for more than 60 years. We are proud to be the steward of Canadian CANDU nuclear technology.

Your role   Provide design solutions and assessments for new, updated and modified process systems, structures and components.
Perform thermal hydraulic evaluations on complex systems.
Performing design/analysis of hydraulic and electro-mechanical systems.
Provide technical guidance, mentorship, and leadership to engineers at lower grade levels and/or other technical employees.
Provide leadership to team on assigned tasks, ensure adherence to project delivery requirements and schedule.
Prepare and/or review design documents for Nuclear Power Plants; e.g., Design Calculation, Design Requirements, Assessments, Technical Specifications, Drawings, Bill of Materials, and System Code Classification.
Prepare and/or review Engineering Quotation Request and Tender Technical Evaluations.
Support Engineering Management with timely updates on engineering progress.
Prepare and/or review Engineering packages.
Ensure adherence to company quality program.
Ensure applicable code, standards and regulatory requirements are met.
Provide support for the preparation of Engineering proposals.
Perform walkdowns, attend site visits and meetings as required.
Interface with internal and external stake holders as required.
About You   Engineering degree from an accredited University in Mechanical Engineering, Chemical Engineering, Nuclear Engineering or Engineering Science.
Registered as a Professional Engineer in Ontario.
A minimum of 12 years of experience in process-system design/analysis, preferably providing design solutions for CANDU nuclear power plants or BWR/PWR markets.
Experience performing heat balance and thermal hydraulic evaluations.
Experience in process system design and layout.
Experience performing work to nuclear power plants procedures and practices and qualifications for nuclear power plants engineering activities is an asset.
Knowledge of analytical tools used for mechanical and process design; e.g., ANSYS, Mathcad, Flomaster, NUCIRC, CATHENA or similar.
Working knowledge of/experience using nuclear Codes and Standards, including CSA N285.0 and ASME Section III.
Working knowledge of/experience with the CSA B51 standard, ASME B31.1 codes and other nuclear-power-plant applicable standards or regulatory guides related to permanent plant components, pressure boundary equipment, and/or reactor systems.
Must have excellent technical and practical skills to resolve engineering issues or technical problems.
Must have excellent communication and technical writing skills.
Site experience in construction, or commissioning of plant mechanical systems for nuclear or other heavy industries is an asset.
Rewards & benefits  Explore the rewards and benefits that help you thrive – at every stage of your life and your career at Atkins

Réalis 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 Atkins

Réalis  We re Atkins

Réalis, 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  Atkins

Réalis cares about your privacy. Atkins

Réalis and other subsidiary or affiliated companies of Atkins

Réalis (referred to throughout as "Atkins

Réalis") 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 Atkins

Réalis, 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 Atkins

Réalis  accommodation policies at the time the employment offer is extended, and the information will be shared with new personnel during the onboarding process.

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Position Requirements
10+ Years work experience
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