Principal Civil Engineer

Principal Civil Engineer 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. About Assystem 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. The Role We are seeking an experienced Principal Civil 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 civil and structural engineering activities supporting nuclear new build and infrastructure projects across Canada. This includes responsibility for site layout, foundations, seismic assessments, reinforced concrete and steel design, and integration with multidisciplinary design teams. 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. Develop and review civil design deliverables including calculations, drawings, and specifications. Oversee geotechnical assessments, grading, and drainage design. Ensure designs meet nuclear‑grade quality and seismic resilience standards. Support constructability reviews and interface with architectural and mechanical systems. Lead civil design assurance and regulatory compliance reviews. 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 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. Experience working with major Canadian nuclear operators. Strong stakeholder management and communication skills. Experience working with CANDU or AP1000 technology. Previous international or large‑scale infrastructure project experience. Civil design experience for nuclear, energy, or industrial facilities. Knowledge of CSA and ASCE standards applicable to nuclear design. Experience managing civil/structural teams in a regulated environment. 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. Senior Details Seniority level: Mid‑Senior level Employment type: Full‑time Job function: Engineering, Consulting, and Project Management Industries: Business Consulting and Services, Engineering Services, Services for Renewable Energy #J-18808-Ljbffr