Principal Civil Engineer

Assystem is an international company with one mission: accelerate the energy transition around the world. Drawing on more than 55 years' experience in highly regulated sectors subject to strict security and safety requirements, our 8,000 personnel in 12 countries provide our customers with engineering and project management services, as well as digital services and solutions to optimise the performance of complex infrastructure projects throughout their life cycle.

The Group is currently ranked second in the world for nuclear engineering. Our goal is to ensure a viable, efficient, and reliable energy future for all.

We are seeking experienced Principal and Senior Principal Civil Engineers to join our Fusion and Modular Nuclear team. This is a unique opportunity to strengthen our ever‑growing Civil, Structural and Architectural (CS&A) capability within Assystem, supporting the design and delivery of complex nuclear facilities for exciting SMR, AMR and Fusion developments in the UK and internationally.

In this role, you will help shape the future of nuclear infrastructure through integrated, innovative and resilient engineering solutions. Working within multidisciplinary teams, you will contribute to the development of major nuclear facilities from concept and optioneering through to detailed design, construction and commissioning. Your work will encompass site development and master planning, hazard assessment, safety case substantiation, advanced structural analysis, constructability, sustainability and operational performance.

You will provide technical leadership across a diverse portfolio of projects, working closely with clients, regulators, contractors and delivery partners to develop safe, efficient and cost‑effective engineering solutions. The role offers significant opportunity to influence major programmes and contribute to the growth of Assystem's nuclear capability.

We are seeking experienced Principal and Senior Principal Civil Engineers to join our Fusion and Modular Nuclear team. This is a unique opportunity to strengthen our ever‑growing Civil, Structural and Architectural (CS&A) capability within Assystem, supporting the design and delivery of complex nuclear facilities for exciting SMR, AMR and Fusion developments in the UK and internationally.

In this role, you will help shape the future of nuclear infrastructure through integrated, innovative and resilient engineering solutions. Working within multidisciplinary teams, you will contribute to the development of major nuclear facilities from concept and optioneering through to detailed design, construction and commissioning. Your work will encompass site development and master planning, hazard assessment, safety case substantiation, advanced structural analysis, constructability, sustainability and operational performance.

You will provide technical leadership across a diverse portfolio of projects, working closely with clients, regulators, contractors and delivery partners to develop safe, efficient and cost‑effective engineering solutions. The role offers significant opportunity to influence major programmes and contribute to the growth of Assystem's nuclear capability.

• Lead the analysis and design for both nuclear safety-related and conventional civil structures, including both above-ground and below-ground facilities
• Lead the development of engineering solutions for structures subjected to seismic, environmental and accidental loading conditions
• Oversee, review and approve technical deliverables, including engineering calculations, analysis reports, finite element models, specifications and drawings, in accordance with our quality assurance requirements
• Act as…