Lead Civil Engineer in London

At Assystem, our mission is to accelerate the global energy transition by driving innovation in low-carbon energy. With 8000 Switchers across 12 countries, we leverage 55+ years of expertise in highly regulated industries to deliver engineering and digital solutions for complex infrastructure projects. As one of the top three nuclear engineering companies in the world, we are committed to a sustainable and reliable energy future for all.

This is a full-time, site-based senior leadership role located in Leiston, Suffolk, supporting delivery on the Sizewell C Main Development Site. You will provide leadership across a defined section of the Site Delivery footprint, with accountability for capital works delivery and delegated Principal Contractor responsibilities.

The role involves leading senior site management teams and coordinating multi-disciplinary delivery across major civil works, networks, buildings, and enabling works:

• Lead delivery of complex site scope under delegated Principal Contractor responsibility
• Manage Senior Managers across enabling works, major civils, networks, and buildings
• Coordinate matrix teams including safety, quality, commercial, and supply chain
• Define and manage cross-programme interfaces with civils, conventional and nuclear programmes
• Drive delivery to safety, schedule, cost, quality, and technical requirements
• Monitor progress, manage risk, and control change across delivery scope
• Ensure programme schedules and deliverables are developed and maintained
• Apply continuous improvement and embed lessons learned as standard practice
• Maintain compliance with CDM regulations, statutory legislation, and site strategies

Nuclear experience is not essential, but is of course welcome. If you have worked within a highly regulated environment, your skills and leadership approach are highly transferable and of strong interest to us.

We also recognise that the perfect candidate rarely exists. If you feel you meet around 80% of the criteria and are motivated to develop further, we would strongly encourage you to apply:

• Degree in Civil Engineering, Structural Engineering, or Construction Management
• Chartered Engineer or equivalent senior professional membership preferred
• Proven experience managing projects through full lifecycle delivery
• Strong background in heavy civil engineering or regulated infrastructure
• Experience delivering large-scale EPCM or principal contractor scope
• Demonstrated control of cost, schedule, risk, and change
• Strong understanding of nuclear or equivalent high-integrity quality regimes
• Experience managing NEC or FIDIC-based contracts

This is a rare opportunity to take on a senior, site-based leadership role on one of the UK's most important infrastructure projects. You will shape delivery at scale, influence outcomes that matter nationally, and work alongside experienced professionals who value accountability and collaboration.

Benefits include:

• Hybrid Working Opportunity
• Flexible working hours
• Market Leading Pension scheme (8% company contribution / 4% personal contribution)
• 25 days' paid annual leave + bank holidays + option to buy or sell days
• Professional fees reimbursed
• Employee referral scheme
• Competitive Sick Pay – Support when you need it
• Income Protection & 3x Salary Death-in-Service Cover
• Free Digital Gym Access – Expert-led fitness classes 24/7
• Employee Support Line – Mental health, financial & legal help

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people's ability to dare are the only things that matter! Bring your unique contributions and help us shape the future.