Principal Layout Integration Engineer

Join the Fusion and Modular Nuclear Business Unit! Reporting to the Layout Engineering Manager, the Principal Layout Integration Engineer will provide technical leadership across Fusion and Modular Nuclear programmes. The Principal Layout Integration Engineer will act as a recognised subject matter expert for plant layout integration, piping layout, building integration, modularisation and multidisciplinary coordination. The role will support project delivery, capability growth, business development and development of engineering best practice.

Whilst providing technical leadership and strategic direction, the Principal Layout Integration Engineer will remain actively involved in project delivery, supporting development of complex layouts, technical studies and resolution of challenging engineering issues.

• Lead plant layout development from concept through detailed design for complex facilities and plant areas.
• Act as technical lead for major buildings, systems or programme‑level integration activities.
• Lead development of equipment, piping, cable tray, access and maintenance arrangements.
• Lead piping routing studies and layout optimisation activities.
• Provide technical leadership across multiple projects and programmes.
• Lead requirements‑driven layout development and multidisciplinary integration activities.
• Define layout integration methodologies, standards and engineering approaches.
• Lead major optioneering, constructability, modularisation and plant integration studies.
• Lead complex multidisciplinary reviews and technical workshops.
• Provide technical assurance and review of layout deliverables.
• Lead resolution of complex layout, routing, requirements and integration challenges.
• Ensure layout solutions satisfy operational, safety, constructability and lifecycle requirements.
• Support bids, proposals and client engagement activities.
• Develop layout standards, procedures and best practice guidance.
• Mentor engineers and support capability development.
• Support recruitment, succession planning and capability growth.
• Author and review technical reports, engineering strategies and client‑facing documentation.

Join Assystem and become a key player in delivering critical nuclear projects that shape the future of energy. Embrace this opportunity to excel in a dynamic environment where your expertise and leadership will drive global innovation.

• Pension scheme (8% company contribution / 4% personal contribution)
• 25 days’ paid annual leave + bank holidays + option to buy or sell days
• Professional fees reimbursed
• Flexible working
• Employee referral scheme