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
Reporting directly to the Sizewell C Site Delivery Director, the Site Delivery Lead holds delegated accountability for the end to end delivery of a defined section of the Main Development Site.
This is a senior leadership position operating just below Director level, with responsibility for leading Senior Managers and Area Delivery teams, and carrying delegated Principal Contractor duties across enabling works, major civils, networks and buildings. The role holds significant safety, commercial and programme accountability within a technically complex, highly regulated nuclear construction environment.
The Site Delivery Lead ensures safe, compliant and predictable execution of scope from concept through to handover, aligning construction strategy with programme objectives, contractual obligations and statutory legislation.
Key Responsibilities
Provide senior leadership across a defined Site Delivery portfolio within the Main Development Site
Hold delegated Principal Contractor responsibility in line with CDM legislation and project strategy
Lead, develop and performance manage Senior Managers and matrix delivery teams
Drive safe, on time and on budget delivery in accordance with the Programme Execution Plan
Maintain full oversight of cost, risk, schedule and change control using robust performance management tools
Define and manage cross programme interfaces with Civil Works, Nuclear Island, Conventional Island and MEH alliances
Ensure contractual obligations and List of Deliverables are fulfilled across assigned scope
Manage commercial exposure including variations, compensation events and associated negotiations
Monitor progress against milestones and provide clear reporting to the Site Delivery Director
Embed nuclear safety culture and ensure quality is assured through a graded approach
Apply continuous improvement and knowledge capture as business as usual across the delivery organisation
Provide strategic workforce planning and ensure sustained SQEP compliance across the Area Delivery team
Lead performance assurance reviews across contractors and delivery partners, driving corrective action where required
Qualifications
Nuclear experience is not essential, but is of course welcome. If you have worked within a highly regulated environment, your skills and 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 percent of the criteria and are motivated to develop further, we would strongly encourage you to apply.
Degree in Civil or Structural Engineering or Construction Management, or equivalent
Chartered Engineer or Fellow status with a recognised professional body preferred
Demonstrable experience of managing projects through the full lifecycle from concept to handover
Strong understanding of nuclear quality requirements and application of a graded approach
Proven leadership within large scale infrastructure or nuclear new build environments
Extensive experience delivering reinforced concrete and high integrity civil structures
Strong commercial awareness with deep familiarity of NEC and FIDIC contract forms
Demonstrable experience holding delegated Principal Contractor responsibilities on major infrastructure projects
Proficient in cost control, risk management, scheduling and earned value techniques
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