Senior Mechanical/Process Engineer
LocationCA.ON.Mississauga.2251 Speakman Drive
Work modehybrid
Typefull-time
SenioritySenior
Experience15+ yrs
Company size10,000+ people
PostedJun 16, 2026 · 3mo ago
Verified live22h ago
At a glanceSummarised by Seekless from the posting.
Degree in Mechanical or Chemical Engineering from an accredited University
Minimum of 15 years of relevant experience
Minimum 10 years in the nuclear industry as a Senior Design Engineer working on modifications to nuclear systems or components
Qualified Specialized Professional Engineer to ASME Section III, Div.1, Appendix XXIII or qualified for certification
Registered Professional Engineer in the Province of Ontario, and member in good standing
Experienced in Refurbishment, Modifications and technologies enhancement of existing Mechanical and Piping Systems Structures and Components (SSCs) in operating stations from Conceptual Design to Available For Service (AFS) and Close Out following established Client Engineering Change Control (ECC) processes and procedures
Experience in plant islanding/lay-up engineering
Mechanical, Process and Piping Systems integration/design and analysis for SSCs (e.g. Turbine Auxiliary Systems, Moisture Separators/Reheaters, Water Treatment Plant, Main Condenser, HVAC, Station Drainage, Cranes, Compressed Air Systems, Water Systems, Chillers, etc.)
Experience interfacing with CNSC and TSSA including preparing correspondence letters, TSSA registration and re-conciliation packages, code classifications and memos
Working knowledge of nuclear codes and standards, including CSA N285.0, CSA N289, ASME Section III Division 1 and ASME B31.1
Working knowledge of major nuclear operator’s ECC process
Excellent written and oral communication skills
Results driven individual with strong interpersonal skills
Knowledge of pressure boundary work including pressure vessel design, analysis, code classification, code class boundary, non-destructive examination and design registration
Knowledge of dimensioning and tolerancing ASME Y14.5 standard
Presentation skills and public speaking abilities
Knowledge of seismic and environmental qualification methods and processes
Skills
ASME Section III Division 1
ASME B31.1
CSA N285.0
CSA N289
ASME Y14.5
CNSC
TSSA
Benefits
Competitive compensation
Employee recognition
Flexible benefits
Health insurance
Wellness
Financial
Lifestyle
Training
Professional development
Hybrid work
Generous time off
Job Description
Overview
AtkinsRéalis is looking to hire a Senior Mechanical/Process 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.
•
Prepare and review Engineering Change packages following major nuclear operator’s ECC process.
•
Mentor and provide technical guidance to junior engineers.
•
Perform calculations and assessment as required.
•
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 are met.
About you
•
Degree in Mechanical or Chemical Engineering from an accredited University with a minimum of 15 years of relevant experience (minimum 10 years in the nuclear industry as a Senior Design Engineer working on modifications to nuclear systems or components).
•
Qualified Specialized Professional Engineer to ASME Section III, Div.1, Appendix XXIII or qualified for certification.
•
Registered Professional Engineer in the Province of Ontario, and member in good standing.
•
Experienced in Refurbishment, Modifications and technologies enhancement of existing Mechanical and Piping Systems Structures and Components (SSCs) in operating stations from Conceptual Design to Available For Service (AFS) and Close Out following established Client Engineering Change Control (ECC) processes and procedures.
•
Experience in plant islanding/lay-up engineering. Mechanical, Process and Piping Systems integration/design and analysis for SSCs (e.g. Turbine Auxiliary Systems, Moisture Separators/Reheaters, Water Treatment Plant, Main Condenser, HVAC, Station Drainage, Cranes, Compressed Air Systems, Water Systems, Chillers, etc.).
•
Experience interfacing with CNSC and TSSA including preparing correspondence letters, TSSA registration and re-conciliation packages, code classifications and memos.
•
Working knowledge of nuclear codes and standards, including CSA N285.0, CSA N289, ASME Section III Division 1 and ASME B31.1.
•
Working knowledge of major nuclear operator’s ECC process.
•
Excellent written and oral communication skills.
•
Results driven individual with strong interpersonal skills.
Nice to have
Additional, preferred qualifications:
•
Knowledge of pressure boundary work including pressure vessel design, analysis, code classification, code class boundary, non-destructive examination and design registration is an asset.
•
Knowledge of dimensioning and tolerancing ASME Y14.5 standard is an asset.
•
Presentation skills and public speaking abilities is an asset.
•
Knowledge of seismic and environmental qualification methods and processes is an asset.
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.*