Overview

We are currently seeking a Specialist Engineer who specializes in the design of CANDU Reactivity Control Units (i.e., Reactivity Mechanisms), providing strategic technical leadership, defining engineering approaches, and serving as a primary technical interface with organizations inside and outside the company on complex, large‑scale refurbishment and recent build nuclear projects.

Your Role

- Acts as a recognized technical leader in the design of CANDU reactor components, systems, and structures across complex projects.
- Is recognized as a Subject Matter Expert for CANDU Reactivity Control Units and maintains effective technical liaison with internal and external organizations.
- Provide technical leadership and mentoring of junior, intermediate and senior engineers, influencing and aligning engineering practice across projects.
- Develops new engineering concepts and design modifications to meet functional, regulatory, and lifecycle requirements.
- Devises and champions new approaches to complex or novel problems within the engineering specialty.
- Leads the resolution of critical and high‑risk engineering issues, providing timely, and defensible engineering solutions/direction.
- Addresses complex engineering challenges involving conflicting requirements, non‑standard materials, and difficult coordination constraints, establishing technically sound resolutions.
- Evaluates and confirms the feasibility, robustness, and technical soundness of proposed engineering methods and approaches.
- Apply extensive knowledge of engineering precedents and related disciplines to establish technical judgement and direction.
- Provides guidance on applicable codes, standards,



and regulatory requirements related to the discipline.
- Performs critical reviews of design documents, calculations, drawings, and analysis reports, resolving complex or precedent‑setting technical issues.
- Review engineering assessments for the design and integrity of nuclear pressure boundary components.
- Review design documentation to ensure client requirements are met and initiate any corrective actions as necessary.
- Support technical and commercial interfaces with the client.
- To define work scope, plan activities, and coordinate engineering work for all design phases within major projects or across projects of considerable scope and complexity.
- Supports and guides the execution of technical engineering work packages to deliver within approved scope, budget, and schedule.
- Is responsible for reporting technical progress, risks and schedule status to technical and project management.
- Contributes to engineering budgets and provides technical input for defined work packages.
- Participates in development, interpretation, and advancement of engineering standards and contributes to technical forums within the area of specialty.
- Contributes technical input to operational and strategic planning processes, influencing engineering direction and resource deployment.




- Participate in the training and development of engineering staff.
- Operates with minimal technical supervision, receiving guidance primarily on overall objectives, and critical issues.

About You

- A Bachelor'S or Graduate degree in Mechanical Engineering (or related discipline such as Materials or Nuclear Engineering) from a university of recognized standing.
- Licensed as a Professional Engineer in the Province of Ontario.
- Minimum 15 years of related work experience with CANDU reactor design and/or ASME pressure vessel design.
- Experience in classical stress calculation. Knowledge of first principles related to solid mechanics such as relationship between stress and strain, material properties, fatigue, fracture mechanics, creep.
- Experienced in producing drawings (including dimensioning and tolerancing). Knowledge of GD&T;'is preferred.
- Knowledge of CANDU Reactivity Control Units design is preferred.
- Familiarity with AtkinsRéalis/Candu Energy Quality Assurance programs and processes and procedures.
- Familiarity with ASME Section III pressure boundary design and CSA N285.0.
- Ability to work as part of a multi-disciplinary team.
- Ability to work independently and demonstrate problem‑solving skills.
- Drive for continuous learning by own initiative.
- Excellent time management skills and ability to prioritize work within project constraints.
- Strong written and oral communication skills.

Rewards & Benefits

Explore the rewards and advantages 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 r

📌 Specialist Engineer (Mississauga)
🏢 AtkinsRéalis
📍 Mississauga