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AtkinsRéalis

Senior Plant Controls Systems Engineer

Mississauga, ON, Canada

Job type: Full-time
Apply by: Oct 29, 2026
Experience: Minimum 12 years of experience in nuclear power generation or related industries
Posting language: English
Posted: Sep 29, 2026

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Applications open in a new tab.

Original job description

Overview

The Computer Systems Engineering department is responsible for digital instrumentation and control equipment for projects involving control, monitoring, and operator displays in the nuclear island for our existing customers and new builds. The department is responsible for digital system design, equipment selection and procurement, and all software activities.

Your role

Acts as project technical lead, has prime technical and commercial interface with the client and internal engineering and commercial groups on projects of substantial scale and complexity.
Participate in conceptual design of safety/control systems to define system requirements, computer system architecture/design, product /tool technologies and evaluate system performance and reliability.
Evaluate computer vendor products and prepare procedures/guides for implementing such products into computer software design, development and V&V processes.
Manage assigned work effectively, including prioritizing, executing, managing schedule and budget and reporting to meet project goals
Preparation of system/software change request for modifications to existing systems/software
Prepare requirements and develop tools for test/development systems as needed for production of safety critical software
Execute software engineering tasks including software requirements specification, software design description, coding, verification, testing and documentation
Asist in planning activities associated with design, verification and testing of computerized safety/control systems
Develop software and scripts using a variety of programming languages/toolsets/environments including, but not limited to IEC61131-3 languages, C C++ Visual Studio, Labview, XML.
Test script development using in-house developed scripting languages for software/system V&V testing
Update and/or prepare computer engineering design documents including SRS/SDD and software manuals
Interface with various engineering disciplines, suppliers, and other divisions within the company

About You

Honours degree in a relevant field of engineering from a university of recognized standing. Professional Engineering license preferred.
Minimum 12 years of experience in nuclear power generation or related industries
Experience with industry and/or international I&C/software standards is considered an asset
Strong background in computer hardware is considered an asset.
Demonstrate good technical skills and problem-solving capabilities and be able to seek practical solutions to engineering problems.
Demonstrate good interpersonal skills and the ability to work in a multidisciplinary team environment.
Excellent written and oral communication skills.

Rewards & 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 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 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.

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More about this job

Responsibilities

Lead the technical and client interface for complex projects involving nuclear plant control systems, and contribute to the design, selection, and evaluation of safety and control system technologies. Manage project work and develop, verify, test, and document safety-critical software, tools, and system changes while coordinating with multidisciplinary teams and suppliers.

Requirements

Requires an honours degree in a relevant engineering field and at least 12 years of experience in nuclear power generation or a related industry; a Professional Engineering license is preferred. Candidates should have strong technical and problem-solving abilities, communication and teamwork skills, and familiarity with industry standards, software engineering, and preferably computer hardware.

Skills

Nuclear Instrumentation and Control Systems
Digital System Design
Computer System Architecture
Safety-Critical Software
Software Design Description
Software Verification and Validation
Software Testing
IEC 61131-3
C
C++
Visual Studio
LabVIEW
XML
Project Technical Leadership
Client and Supplier Coordination

Benefits

Competitive Compensation
Employee Recognition
Flexible Benefits
Training and Professional Development
Hybrid Working
Generous Time-Off Policies

Visa sponsorship

Not detected in the job text

Keywords

Nuclear Power Generation
Instrumentation and Control
Safety-Critical Systems
Digital System Design
Computer System Architecture
Equipment Selection and Procurement
Software Design Description
Software Verification and Validation
Software Testing
Software Documentation
IEC 61131-3
C
C++
Visual Studio
LabVIEW
XML
Test Script Development
Computer Hardware
Industry Standards
Project Technical Leadership
Project Scheduling
Budget Management
Client Interface
Supplier Coordination
System Reliability

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