Posted last month
Principal Engineer - Mechanical
@ Candu Energy Inc.
Mississauga, Ontario
Overview
AtkinsRéalis is hiring a Principal Engineer (Mechanical) to lead mechanical engineering work on nuclear power plants within a matrix organization. The role prepares and reviews design basis documents, oversees piping and mechanical systems design packages, and supervises junior engineers. Candidates need a Professional Engineer licence in Ontario, at least 15 years of relevant experience, and a required security clearance.
Responsibilities:
- Prepare and review nuclear and conventional system design basis documents
- Oversee mechanical and piping SSC design packages from conceptual design to close out
- Train, mentor and guide junior engineering staff
- Report engineering progress and staffing needs to management
- Interface directly with customer engineering representatives
Requirements summary:
- Mechanical engineering degree and 15+ years relevant experience (10+ in nuclear)
- Professional Engineer licence in Ontario
- Working knowledge of CSA N285.0, ASME Section III Div. 1 and ASME B31.1
- Experience with CNSC and TSSA interfaces
- Excellent written and oral communication skills
Tools & skills
Source and dates
Employer career site / ATS feed · workday
- Employer posting date
- 2026-10-07
- First seen by our source
- 2026-10-08
- Source record updated
- 2026-11-05
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Seniority | Lead |
| Department | Engineering |
| Experience | 15+ years |
| Manages people | Yes |
| Hours per week | 40 (estimated) |
| Work setting | Office, Plant or factory |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
| Languages | English |
| Licences & certifications | Professional Engineer (Ontario), ASME Section III Div. 1 Appendix XXIII Specialized Professional Engineer |
| Education | Bachelor’s degree (required) |
| Fields of study | Mechanical Engineering |
| Security clearance | Other clearance |
| Perks mentioned | Flexible hours, Wellness, Paid training |
Summary and details written by AI from the posting; the employer’s posting is the authority.
Candu Energy Inc.
| Field | Value |
|---|---|
| Open jobs on Jobsy | 226 |
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.
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.
Additional information
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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
EmployeeJob Type
RegularAt 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.
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