Senior Mechanical Designer

-; Oshawa; Hybrid; CAD 80,000 - 110,000; Full time

Job summary

A leading engineering services firm is seeking a Senior Mechanical Designer in Oshawa, Canada. This role involves supporting engineering for nuclear projects, including design and modification of piping systems. Candidates should have a diploma and at least 10 years of experience in mechanical design, proficiency in AutoCAD, and skills in 3D modeling. Offering competitive compensation and hybrid working culture to balance work and personal life.

Benefits

Competitive salary

Flexible benefits

Professional development opportunities

Qualifications

• Minimum 10 years in mechanical/piping design.
• Experience with site visits and inspections required.
• Excellent knowledge of AutoCAD and related software is necessary.

Responsibilities

• Prepare and modify piping/mechanical design packages.
• Coordinate 3D models to ensure integration.
• Develop designs for heating, ventilation, and other systems.

Skills

Piping design support

AutoCAD Plant 3D

Field support

Interpersonal skills

3D modeling

Mechanical equipment design

Education

College diploma or equivalent

Tools

AutoCAD

Smart Plant 3D

MicroStation

Navisworks Manage

SolidWorks

Job description

Job Description

Overview

CANDU Energy Inc./ AtkinsRéalis Nuclear Inc. is actively seeking a qualified Senior Mechanical 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 are not limited to the preparation, design, modification, coordination, and/or review of the following:

• Provide piping/mechanical design support for Engineering Change (EC) design packages.
• Prepare electronic documents in AutoCAD; sketching, three‑dimensional computer modeling, drawings and construction documents.
• 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.
• Coordinate 3D models between disciplines and construction teams to ensure seamless integration and minimize clashes.
• Revise existing drawings/3D models (relative to the discipline) from fairly detailed verbal or written instructions, and/or marked‑up drawings.
• Implement field change requests by updating models, drawings, and BOMs to reflect construction modifications.
• Develop mechanical equipment and piping layout designs, ensuring safe, accessible, and maintainable configurations.
• Assist in developing designs and technical specifications for systems such as heating, air conditioning, ventilation, boilers, plumbing, chilled water, building controls, along with other related systems.

About you

• College diploma or equivalent work experience with a minimum of 10 years in mechanical/piping design and drafting.
• Experience providing field support through site visits and inspections, ensuring adherence to design intent and quality requirements.
• Experience drafting site layouts and construction drawings for industrial sites, buildings and structures is required. Knowledge of new nuclear early site and facility design and drafting is an asset.
• Working knowledge of AutoCAD Plant 3D is a must.
• Working knowledge in AutoCAD, AutoCAD Raster Design, Smart Plant 3D/Smart, MicroStation, Navisworks Manage and SolidWorks.
• Ability to take marked‑up engineering drawings and incorporate changes into AutoCAD files.
• ASME Code knowledge considered an asset.
• Proficient in equipment and piping modeling; ability to interpret Process Flow Diagrams (PFD) and Piping & Instrumentation Diagrams (P&ID) for accurate design implementation.
• This role requires consistent on‑site presence and may involve supporting a shift work schedule based on operational needs.
• Excellent interpersonal skills with the ability to work with staff in a team environment as well as independently.

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.

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

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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.

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.