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AtkinsRéalis

Senior Mechanical Engineer

Mississauga, ON, Canada

Full-time

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Job details

Job type: Full-time
Apply by: Dec 31, 2026
Experience: Typically 8-12 years of experience in mechanical design, tooling, equipment, automation, field engineering, or nuclear projects.
Posting language: English
Posted: Oct 8, 2026

Original job description

Job Description

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.

The successful candidate will lead complex engineering assignments, support tooling and field execution activities, mentor junior staff, and interface with clients, suppliers, and site personnel to ensure safe, reliable, and efficient project delivery.

Your role within the team

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.

Why choose AtkinsRéalis as an employer?

Opportunity to work on major nuclear refurbishment, retube, field services, and new-build projects.
Exposure to both engineering design and field implementation activities.
Career growth through leadership, mentoring, and technical specialization opportunities.
Competitive compensation, flexible benefits, employee share plan, and defined contribution pension plan.
Strong commitment to safety, quality, innovation, and professional development.
Collaborative environment that values technical excellence and work-life balance.

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.

Are you up for the challenge? Apply today and join our team to help engineer a Better Future for our Planet and its People.

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.

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More about this job

Responsibilities

The Senior Mechanical Engineer will lead the design and field execution of complex mechanical systems for nuclear projects, including refurbishment and new-builds. They will provide technical leadership, mentor junior staff, and coordinate with multidisciplinary teams to ensure safe and efficient project delivery.

Requirements

Candidates must hold a Bachelor's degree in Mechanical or Mechatronics Engineering and be a registered Professional Engineer (P.Eng.) in Ontario. The role requires 8-12 years of experience in mechanical design or nuclear projects, along with proficiency in 3D CAD software and strong technical leadership skills.

Skills

Mechanical design
Nuclear engineering
Tooling design
Field service
Project leadership
Machine design
Structural integrity
Hydraulics
Pneumatics
CAD software
Technical specifications
Commissioning
Troubleshooting
Mentoring
Stakeholder management
ASME standards

Benefits

Competitive compensation
Flexible benefits
Employee share plan

Visa sponsorship

Not detected in the job text

Keywords

Mechanical Engineering
Nuclear Projects
Refurbishment
Retube
Field Services
Tooling
Design Engineering
Commissioning
SolidWorks
Solid Edge
Creo
Inventor
ASME
CSA
P.Eng.
Machine Design
Structural Integrity
Hydraulics
Pneumatics
Project Delivery
Technical Leadership
Manufacturing
Outage Execution
Nuclear Security Clearance
Mechanical Systems

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