Let’s find your next opportunity​

{{ job.job_posting_title }}
{{item.trim() }} {{item.trim() }} {{item.trim() }}
{{ job.job_posting_title }}

{{ job.is_cms_job ? (job.cities.split(';').length > 1 ? 'Various locations' : job.location_mappings[0]) : (job.location_mappings.length > 1 ? 'Various locations' : job.location_mappings[0]) }}

saved
viewed

Senior Mechanical Machine CAD Designer

Mississauga, Ontario, Canada

Overview

CANDU Energy Inc./AtkinsRéalis Nuclear Inc. is actively seeking qualified Senior Mechanical Machine CAD Designer to support engineering roles for nuclear projects in major areas, such as, new build in the province of Ontario, international new builds, refurbishment, and continuous plant operation support modifications for nuclear power plants.

Your role

This position requires working on fast paced technically complex projects in the nuclear industries. Typical duties and essential functions will include but not be limited to the preparation, design, modification, coordination, and/or review of the following:

  • Prepare electronic documents in AutoCAD, Microstation, Solid Edge, SolidWorks and other relevant CAD tools.
  • Create precise 3D models for design and visualization, using Model-Based Definition (MBD) to define all product specifications.
  • Follow client driven file management system for document storage.
  • Prepare engineering deliverables for both nuclear and conventional systems in accordance with AtkinsRéalis Nuclear Inc./Candu Energy Quality Assurance Programs and project requirements.
  • Apply relevant Codes & Standards and regulatory requirements and coordinate with design team to ensure compliance.
  • Interface with Engineering teams, throughout the lifecycle of the design project (i.e., from preliminary and conceptual engineering to detailed design, implementation and close-out) to provide practical and effective solutions as per requirements.
  • Must be "Team" oriented with a demonstrated ability to work well with other and promote a positive work environment.
Nuclear Design & Drafting

Location

Mississauga, Ontario, Canada

Job Type

Full time

Ref

R-149152

Salary range

-

About you

  • College diploma or equivalent work experience with a minimum of 9 years in mechanical design and drafting.
  • Individuals are expected to have advanced knowledge of 2D and 3D CAD applications. Such as AutoCAD or MicroStation and SolidWorks.
  • Familiar with machine design, GD&T (including ASME Y14.5 standards, symbol interpretation, and tolerance analysis), and welding principles (MIG, TIG, arc welding, and welding symbol representation).
  • Good understanding of mechanical design principles. Understanding manufacturing processes (machining, welding, and additive manufacturing) and their influence on design decisions.
  • Revise existing drawings/3D models (relative to the discipline) from detailed verbal or written instructions, and/or marked up drawings.
  • Prepare drawings/3D models (relative to the discipline) of high complexity. As requested, implement any necessary design changes, calculations and materials selection – with minimal assistance from more senior staff.
  • Ensure CAD file configuration management and storage are as per procedure.
  • ASME Code knowledge considered an asset.
  • Ability to take marked up engineering drawings and incorporate changes into drawing and modelling files.
  • Recognized as a technical leader, providing mentoring and technical leadership and supporting larger or more complex projects through subject‑matter expertise.
  • Develops and maintains CAD procedures and standards to support quality and consistency.
  • Plans and organizes work, contributes to estimates and schedules, and proactively supports on‑time, on‑budget deliver.
  • Excellent interpersonal skills with the ability to work with staff in a team environment as well as independently.
  • Perform other related duties as required.
Why choose AtkinsRéalis?

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.

Reward & 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.

video thumbnail

Make it brilliant, a career with AtkinsRéalis

Our supportive, collaborative culture inspires us as a global community every day.

Watch this short film and imagine what you could achieve here, too.

About AtkinsRéalis

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.

Related jobs

Civil Engineering Intern - Fall 2026
Cities & development Engineering Part time
Civil Engineering Intern - Fall 2026

Houston, Texas, United States of America

Planner / Sr. Planner / Associate Director
Project, programme & cost management Architecture & Planning Full time
Planner / Sr. Planner / Associate Director

Various locations

Engineer II
Full time
Engineer II

Mumbai, Mahārāshtra, India

BIM Manager
Cities & development Architecture & Planning Full time
BIM Manager

Various locations

BIM Coordinator
Cities & development Engineering Full time
BIM Coordinator

Various locations

Senior HV Electrical Engineer
Cities & development Engineering Full time
Senior HV Electrical Engineer

Dublin, Dublin, Ireland

Associate Director - Planning
Project, programme & cost management Risk Management & Project Controls Full time
Associate Director - Planning

Manchester, United Kingdom

Aquatic Invasive Non-Native Species Scientist
Environment & geoscience Sciences Full time
Aquatic Invasive Non-Native Species Scientist

Various locations

Project Manager - Water Infrastructure
Project, programme & cost management Project & Programme Management Full time
Project Manager - Water Infrastructure

Glasgow, United Kingdom

Intermediate Mechanical/Process Engineer
Nuclear Engineering Full time
Intermediate Mechanical/Process Engineer

Various locations

Technicien(ne) en conception d’infrastructures urbaines – niveau avancé
Transportation Design & Drafting Full time
Technicien(ne) en conception d’infrastructures urbaines – niveau avancé

Rimouski, Quebec, Canada

Senior Mechanical Machine CAD Designer
Nuclear Design & Drafting Full time
Senior Mechanical Machine CAD Designer

Mississauga, Ontario, Canada

Related blogs

Picture of Bhajan, smiling towards the camera

From Aberdeen to Air Quality and Carbon: Bhajan on building a dual role in Environment

Meet Bhajan, an environmental consultant stepping across air quality and carbon, and discover how he’s driving real sustainability impact.

Card link for From Aberdeen to Air Quality and Carbon: Bhajan on building a dual role in Environment

Building generation capacity for the grid we have now

Discover how Bennett Mountain is strengthening Idaho’s grid with 162MW of fast-start capacity designed to respond when people need it most.

Card link for Building generation capacity for the grid we have now

From contaminated land to large-scale groundwater programmes: Erin on 20 years in environmental engineering

After close to two decades in the environmental space, Erin has built a career defined by curiosity, range, and a deep-rooted drive to protect the planet. Based in Calgary, Alberta, Canada, Erin is a senior project manager and environmental engineer whose work now spans large hydrogeological and groundwater programmes, a long way from the contaminated sites where she started out.

Card link for From contaminated land to large-scale groundwater programmes: Erin on 20 years in environmental engineering

From fieldwork to leadership in Northern Canada: Alana’s career in environmental remediation

I’m the Team Lead for Northern BC and the Yukon at AtkinsRéalis, and a Senior Project Manager in environmental site remediation. I help tackle complex environmental challenges, and find smarter, more sustainable ways to give new life to contaminated sites.

Card link for From fieldwork to leadership in Northern Canada: Alana’s career in environmental remediation

Saeed : Designing the tools that keep nuclear work safe

Saeed is a Tooling Engineer at Candu Energy Inc., an AtkinsRéalis company, contributing to some of the largest and most technically demanding nuclear refurbishment projects.

Card link for Saeed : Designing the tools that keep nuclear work safe

What makes early careers at AtkinsRéalis different? Peter’s story reveals it.

Explore how Peter’s graduate journey at AtkinsRéalis was shaped by real‑world responsibility, supportive teams, and leadership access, setting the foundation for early career success.

Card link for What makes early careers at AtkinsRéalis different? Peter’s story reveals it.

My first 60 days at AtkinsRéalis – Gahee’s journey into people, culture, and change

From warm welcomes to meaningful impact, Gahee Jeong reflects on her first 60 days at AtkinsRéalis while navigating global HR practices, local leadership, and growth from day one.

Card link for My first 60 days at AtkinsRéalis – Gahee’s journey into people, culture, and change

From day one to driving impact: Haresh on his early journey at AtkinsRéalis

Meet Haresh, driving direction, strengthening delivery, and building global alignment from the very start.

Card link for From day one to driving impact: Haresh on his early journey at AtkinsRéalis
A portrait picture of Bethan on her graduation day

Starting my nuclear engineering journey: Early experiences shaping my career

Meet Bethan and read how she’s building her career as a Graduate Electrical Engineer working on major nuclear projects at AtkinsRéalis.

Card link for Starting my nuclear engineering journey: Early experiences shaping my career
A smiling picture of Remya

Remya on nuclear design, multidisciplinary problem‑solving, and what drives her work

Meet Remya, an EC&I engineer leading nuclear design across global markets and read how variety, flexibility, and multidisciplinary work have shaped her career at AtkinsRéalis .

Card link for Remya on nuclear design, multidisciplinary problem‑solving, and what drives her work
Headshot of Ejike

Ejike on joining as a graduate, leading nuclear projects in Bristol, and why no two days are the same

Meet Ejike, an EC&I engineer who joined AtkinsRéalis as a graduate and now leads complex nuclear projects.

Card link for Ejike on joining as a graduate, leading nuclear projects in Bristol, and why no two days are the same

Spains Hall Estate: What happens when you let beavers solve a flooding problem

Discover how environmental science and natural processes combined to manage flooding in Essex.

Card link for Spains Hall Estate: What happens when you let beavers solve a flooding problem