Company Description
⚡️💡 About Assystem
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.
🤝 Why Join the Community of Switchers?
When you join Assystem, you’re joining one of the top three largest nuclear engineering companies globally. Collaborate with a team that combines world-class engineering expertise with digital innovation to solve the challenges of energy transition. Be part of a mission to create a more sustainable future and enjoy opportunities to develop your skills and progress your career in exciting, high-impact projects.
Job Description
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
Qualifications
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
Additional Information
🌟 Why Apply?
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