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Added 12 mins ago
SO
Senior Software Engineer, Dentrix Ascend
Software of Excellence
Surrey, BC
- Full-time
Our Dentrix Ascend engineering team contributes to the development of Dentrix Ascend, our cloud-based practice management platform used by dental practices across the United States.…
Added 13 mins ago
WH
Digital Transformation Intern
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Toronto, ON
- Full-time
Added 13 mins ago
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Digital Transformation Intern
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Added 13 mins ago
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Sr, Mainframe Engineer, TD Securities
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Toronto, ON
- Full-time
…opportunities to all colleagues. Growth opportunities and skill development are defining features of the colleague experience at TD. Our compensation policies and practices have been…
Added 28 mins ago
EI
Thermal Design Engineer
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- Full-time
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Added 28 mins ago
4I
Senior Embedded Systems Electronics Engineer
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- $118,000 to $132,000 CAD / year
- Full-time
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Added 28 mins ago
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Added 28 mins ago
TU
Assistant Professor or Associate Professor in Computer Engineering
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Vancouver, BC
- Full-time
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Added 28 mins ago
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Senior Software Engineer
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- Full-time
Our Dentrix Ascend engineering team contributes to the development of Dentrix Ascend, our cloud-based practice management platform used by dental practices across the United States.…
Added 43 mins ago
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Lead Engineer - Payments Platform
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- Full-time
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Added 57 mins ago
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Structural Engineer
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Added 57 mins ago
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…Engineering Team in our Edmonton office. Reporting to the Consulting Engineer, the successful candidate will be accountable for creating exceptional client experiences by creating and…
Added 57 mins ago
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Senior Site Reliability Engineer – AEM
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Intermediate/Senior Civil/Structural Engineer
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- Full-time
Currently, Tetranex is seeking a full-time Intermediate/Senior Civil/Structural Engineer.
Added 57 mins ago
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Instrumentation and Control Engineer
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Added 57 mins ago
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Senior Java Software Engineer
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Added 58 mins ago
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Civil Design Engineer
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Added 1 hour ago
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Data Engineer 1
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Added 1 hour ago
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Software engineer
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North York, ON
- From $69.17 CAD / hour
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Added 1 hour ago
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Senior Product Manager, Digital Assets Squad
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- Full-time
Winning Through Individual and Collective Growth – You invest in your own development and actively contribute to the growth of every engineer around you.
Added 1 hour ago
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Senior Product Manager, Fund Management
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Added 1 hour ago
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Designer, Development (Service)
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Added 1 hour ago
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Product Development Engineer
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Bolton, ON
- Full-time
Our Development Engineering team is looking to hire an experienced Product Development Engineer. The successful candidate will lead the technical development of packaging products working…

AtkinsRéalis

Principal Engineer - Mechanical

Mississauga, ON, Canada

Full-time

Apply About employer

Applications open in a new tab.

Job details

Job type: Full-time
Apply by: Dec 31, 2026
Experience: Degree in Mechanical Engineering from an accredited University with a minimum of 15 years of relevant experience (minimum 10 years in the nuclear industry).
Posting language: English
Posted: Oct 8, 2026

Original job description

Job Description

Overview

AtkinsRéalis is looking to hire a Senior Mechanical Engineer. This position requires experienced individuals who are self-starter capable of working independently and leading/supervising junior engineers. The individuals will work in a fast-paced team environment performing engineering services for Nuclear Power Plants within a matrix organization.

Your role

Prepare and review design basis documents for both nuclear and conventional systems of the nuclear power station e.g. design specification, over-pressure protection reports and design reports, Drawings, BOMs, SCL, etc.
Oversee the preparation of Mechanical and Piping Structures, Systems, and Components (SSCs) Design Packages from Conceptual Design to Available For Service (AFS) and Close Out.
Train, mentor and provide technical guidance to junior staff.
Support Engineering Management with timely updates on engineering progress, performance and staffing needs.
Directly interface with Customer’s engineering representatives.
Ensure that applicable standards and regulatory requirements and met.

About you

Required qualifications:

Degree in Mechanical Engineering from an accredited University with a minimum of 15 years of relevant experience (minimum 10 years in the nuclear industry).
Registered Professional Engineer in the Province of Ontario, and member in good standing. o Working knowledge of pressure boundary codes and standards, including CSA N285.0, ASME Section III Division 1 and ASME B31.1.
Experience in power plant equipment, including but not limited to equipment in the Nuclear Island, Turbine Island, Balance of Plant, Auxiliary Systems (HVAC, Compressed Air Systems, Water Systems, Chillers, etc.).
Qualified Specialized Professional Engineer to ASME Section III, Div.1, Appendix XXIII or qualified for certification.
Experience interfacing with CNSC and TSSA including preparing correspondence letters, TSSA registration and re-conciliation packages, code classifications and memos.
Excellent written and oral communication skills.
Results-driven individual with strong interpersonal skills that thrives in a dynamic, project-delivery environment.

Additional, preferred qualifications:

Knowledge of dimensioning and tolerancing ASME Y14.5 standard is an asset.
Working knowledge of major nuclear operator’s Engineering Change Control process.
Presentation skills and public speaking abilities is an asset.
Knowledge of seismic and environmental qualification methods and processes is an asset.
Security Clearance is a condition of employment.

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.

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.

Apply About employer

More about this job

Responsibilities

Prepare and review design basis documents and oversee the development of mechanical and piping design packages from conceptual design to service. Provide technical guidance to junior staff while interfacing with customers and ensuring compliance with regulatory standards.

Requirements

Requires a degree in Mechanical Engineering and at least 15 years of relevant experience, with a minimum of 10 years in the nuclear industry. Must be a registered Professional Engineer in Ontario and possess deep knowledge of pressure boundary codes and standards.

Skills

Mechanical engineering
Nuclear power plant systems
Pressure boundary codes
CSA N285.0
ASME Section III
ASME B31.1
Design specification
Technical leadership
Project management
Regulatory compliance
CNSC interface
TSSA registration
Engineering change control
Mentoring
Communication skills
Interpersonal skills

Benefits

Competitive compensation
Employee recognition
Flexible benefits
Training and professional development
Hybrid working culture
Generous time-off policies

Visa sponsorship

Not detected in the job text

Keywords

Mechanical Engineering
Nuclear Power
Pressure Boundary
CSA N285.0
ASME Section III
ASME B31.1
Nuclear Island
Turbine Island
HVAC
Design Basis
Engineering Change Control
CNSC
TSSA
Professional Engineer
Seismic Qualification
Environmental Qualification
Project Delivery
Conceptual Design
BOM
SCL
Regulatory Compliance
Technical Mentoring
Mechanical Systems
Piping Systems
ASME Y14.5

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