Principal Mechanical Engineer - Nuclear

Building on our past. Ready for the future
Worley is a global professional services company of energy, chemicals and resources experts. We partner with customers to deliver projects and create value over the life of their assets. We’re bridging two worlds, moving towards more sustainable energy sources, while helping to provide the energy, chemicals and resources needed now.

Purpose: 
Worley is seeking Principal Mechanical Design Engineer based in Markham, Ontario with experience in Nuclear Power Plant Industries. In Worley Canada East, you will report to Manager of Mechanical and Piping Engineering Department and you will work in Nuclear Section under Nuclear Director of Engineering. You will work with Design Team Leads on various project and will work well with the rest of the project team and customer while upholding Worley’s standards for safety and technical excellence.

You will be part of a growing team that is embedded in the transformation of Ontario’s Nuclear fleet, working on critical projects, some of the most ambitious clean energy programs in the world. Why join Worley’s Nuclear team:

• The scale of impact — supporting cornerstone projects that power millions of homes with zero-emission energy.
• The engineering culture — technically rigorous, quality-driven, and execution-focused.
• The people — high-performing, collaborative teams who care deeply about what they do.
• The opportunity to grow — not just personally, but to help shape the next generation of nuclear professionals.

If you’re looking for more than a job — if you want to help build the future of energy — we’re hiring across all disciplines. Come work where it matters.  

Responsibilities:

• Principal level mechanical engineering design and analysis for nuclear projects, ensuring compliance with industry standards and regulatory requirements.
• Direct and oversee mechanical design efforts on nuclear projects, with emphasis on refurbishment and upgrade scopes, ensuring optimal performance and safety.
• Prepare, review, and approve detailed technical specifications, calculations, drawings, and engineering documentation.
• Apply Engineering Change Control processes to manage design modifications with full regulatory traceability.
• Conduct complex engineering calculations and simulations to validate design solutions.
• Perform advanced pressure boundary stress analyses using ANSYS and piping stress analyses by AutoPIPE.
• Interpret and implement requirements under ASME Section III and CSA N285 standards in pressure boundary analysis with nuclear nature and ASME Sec VIII and CSA B51 in nonnuclear pressure boundaries.
• Familiar with other applicable Codes and standards related to the Canadian Nuclear Power Plants.
• Application of CSA N299 and CSA N286 in preparation of engineering documents. 
• Collaborate with multidisciplinary teams to ensure design integration, schedule alignment, and regulatory approvals.
• Provide guidance, mentorship, and technical oversight to junior engineers and design teams.
• Participate in regulatory audits, client meetings, and quality assurance activities.
• Participate in risk assessments, design reviews, and constructability evaluations.

What you will bring:
Technical and Industry Experience: 

• Extensive mechanical design engineering experience in nuclear projects, including refurbishment work for OPG and Bruce Power, with deep knowledge of nuclear industry regulations and best practices.
• Deep proficiency in pressure boundary assessments and finite element analysis.
• Hands-on capability with ANSYS and AutoPIPE and other engineering software for complex mechanical evaluations.
• Proven success implementing ASME Codes and CSA Standards within nuclear and nonnuclear system designs.
• Strong leadership, communication, and problem-solving skills in high-stakes, regulated environments.
• Commitment to design excellence, safety compliance, and client satisfaction.
• Advanced understanding of nuclear safety principles, quality assurance, and regulatory compliance.
• Ability to lead complex engineering projects and provide innovative solutions to technical challenges.
• Experience in stakeholder engagement, project management, and regulatory interactions.
• Demonstrated experience on Bruce Power and//or OPG refurbishment projects.
• Bruce Power and/or OPG active Security Clearance.
• Expertise in Engineering Change Control, technical documentation, and regulatory standards.
• Minimum 15 years of mechanical design experience in nuclear industries and refurbishment projects.

Education – Qualifications, Accreditation, Training:

• Bachelor’s degree in mechanical engineering is required.
• Master’s Degree preferred, especially with coursework in Finite Element Analysis (FEA) and related training.
• Completion of official training programs in ASME Section III and CSA N285 is considered a strong asset.

Required:

• Valid Professional Engineering (P.Eng.) license in Ontario.

Please note: No agency representation or submissions will be recognized for this vacancy.

Worley is committed to providing a fair and equitable hiring process for all applicants. As part of this commitment, Worley will ensure that persons with disabilities are provided reasonable accommodations for the hiring process. If you require any accommodations or assistance, please contact us at:  [email protected]

Moving forward together
Whatever your ambition, there’s a path for you here. And there’s no barrier to your potential career success. Join us to broaden your horizons, explore diverse opportunities, and be part of delivering sustainable change.

Ready to join us? Apply now to submit your CV.