Principal I&C Engineer

Principal Instrumentation & Controls Engineer Permanent | Hybrid Working (Project-dependent) About Assystem At Assystem , our mission is to accelerate the global energy transition. With more than 8,000 Switchers worldwide, we combine deep engineering expertise and project management capability with advanced digital solutions to help our clients deliver safe, sustainable, and innovative infrastructure. As one of the world’s largest nuclear engineering organisations, Assystem is a key partner in some of the most complex and high-profile energy projects across new build, decommissioning, and infrastructure modernisation. Why Join the Community of Switchers? By joining Assystem, you’ll become part of an international network of experts working to shape the energy landscape of tomorrow. In Canada, you’ll have the opportunity to contribute to pioneering nuclear new build programmes and play a vital role in achieving the country’s clean energy ambitions. The Role We are seeking an experienced Principal I&C Engineer to support nuclear new build and energy infrastructure projects across Canada. Based in Toronto , you will provide technical leadership and multidisciplinary input during the pre-FEED and development phases , ensuring the successful delivery of major client programmes. You will lead the development and implementation of I&C systems across nuclear new build and modernisation projects, ensuring safety-critical system performance and regulatory compliance. While your primary base will be Toronto, the role may require hybrid work or on-site presence at different client locations , depending on project deployment. Key Responsibilities Lead engineering input into new build and infrastructure development projects. Provide multidisciplinary oversight across civil, mechanical, electrical, and systems engineering packages. Ensure compliance with CNSC, NRC, and IAEA regulatory frameworks. Design and review instrumentation, control logic, and safety system architectures. Specify and integrate control equipment (PLC, DCS, SCADA, and field instrumentation). Support cybersecurity, redundancy, and diversity requirements for nuclear I&C systems. Ensure compliance with IEC, IEEE, and CNSC standards. Collaborate with electrical and mechanical engineers to achieve fully integrated designs. Provide electrical input into feasibility studies and plant layouts. Support feasibility studies, site assessments, and technology evaluations. Coordinate with internal teams and client stakeholders to ensure seamless project integration. Prepare and review technical documentation to high regulatory standards. About You Essential: P.Eng (or equivalent) with eligibility to work in Canada. Proven extensive experience within the nuclear or energy sector . Proven track record delivering pre-FEED and design-phase projects . Strong understanding of regulatory frameworks and safety culture. Demonstrated ability to lead multidisciplinary teams and interface with clients. Desirable: Experience working with major Canadian nuclear operators. Strong stakeholder management and communication skills. Previous international or large-scale infrastructure project experience. Experience with safety-class I&C systems and software lifecycle processes. Familiarity with digital control systems used in CANDU or AP1000 technologies. Proven ability to lead multi-vendor I&C design coordination. What We Offer At Assystem, you’ll have the chance to work on high-impact projects that contribute directly to Canada’s net-zero future . We offer a collaborative, inclusive environment , global career development opportunities, and the satisfaction of being part of a mission-driven engineering community transforming the world’s energy systems. Join us, and become a Switcher.