Senior Mechanical Engineer

Mississauga, Ontario, Canada

Overview

The Senior Mechanical Engineer will support refurbishment, retube, field services, and new‑build nuclear projects. This role combines design engineering expertise with field execution support, providing technical leadership throughout the full lifecycle of tooling, equipment, and mechanical systems from concept development through deployment, commissioning, maintenance, and field operations.

Your role

• Lead conceptual, preliminary, and detailed mechanical design activities for Retube Tooling, specialized equipment, and field service systems.
• Execute and oversee engineering work packages supporting refurbishment, retube, maintenance, outage, and new‑build projects.
• Provide technical leadership for design, procurement, fabrication, assembly, testing, commissioning, deployment, and field implementation activities.
• Support field execution teams by resolving technical issues, developing corrective actions, and providing engineering guidance during equipment installation, operation, maintenance, and troubleshooting.
• Prepare and review engineering deliverables including design requirements, design descriptions, technical specifications, calculations, drawings, test procedures, commissioning plans, operating instructions, and design change packages.
• Perform and verify engineering analyses related to machine design, structural integrity, mechanisms, materials, hydraulics, pneumatics, lifting systems, and pressure‑retaining components.
• Coordinate and lead multidisciplinary teams consisting of engineers, technologists, designers, manufacturing personnel, suppliers, and field staff.
• Interface directly with clients, vendors, contractors, and station personnel to define requirements and resolve technical challenges.
• Mentor and provide technical oversight to junior engineers, designers, and technologists.
• Travel periodically to customer sites and nuclear generating stations to support installation, commissioning, outage execution, inspections, and troubleshooting activities.

About You

• Bachelor’s degree in Mechanical Engineering, Mechatronics Engineering, or equivalent.
• Registered Professional Engineer (P.Eng.) in Ontario, or eligible for registration.
• Typically 8‑12 years of experience in mechanical design, tooling, equipment, automation, field engineering, or nuclear projects.
• Strong understanding of machine design, mechanics of materials, manufacturing methods, and mechanical system integration.
• Experience leading engineering tasks and coordinating multidisciplinary teams.
• Experience supporting field execution, commissioning, maintenance, outage, or refurbishment activities is an asset.
• Familiarity with nuclear industry codes and standards including ASME and CSA requirements is an asset.
• Experience with 3D CAD software such as SolidWorks, Solid Edge, Creo, or Inventor.
• Excellent communication, problem‑solving, and technical leadership skills.

• Excellent problem‑solving, communication, leadership, and stakeholder management skills.
• Ability to obtain and maintain nuclear security clearance and access authorization.

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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.

Why choose AtkinsRéalis?

Wherever you are in your career – and whoever you are – AtkinsRéalis is for you. Here, support and collaboration are a vibrant part of a culture that lets you choose where – and how far – your career can go. Take on projects that push boundaries and drive sustainable impact, surrounded by colleagues who believe there’s no limit to how brilliant you can be. It’s time to join a like‑minded team where you’ll be rewarded, supported, and free to be your kind of brilliant.

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.