Site Delivery Lead - Civils

Overview

At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in science, security, and sustainability. If you're passionate about making a real impact and want to be part of a community that values ethical excellence, this is the place where your ambition can thrive.

Here, we believe that success comes from continuously pushing boundaries and working together to deliver on our promises. We embrace challenges with confidence and are dedicated to creating a secure and vibrant future for all.

We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive and diverse team who always strive to do the right thing for our people, clients and communities. People are our greatest asset, and we offer a competitive package to retain and attract the best talent.

In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family-friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships. Work-life balance and flexibility is a key focus area for us. We’re happy to discuss hybrid, part-time and flexible working hours, patterns and locations to suit you and our business.

Lead delivery of a major section of the Sizewell C programme—one of the UK’s largest infrastructure and nuclear new‑build projects. This role supports safe, timely, and efficient delivery of capital works across the Main Development Site, contributing directly to the UK’s Net Zero ambitions.

Reporting to the Site Delivery Director, you will provide leadership across a multi‑discipline area of the site, acting with delegated Principal Contractor responsibility. You’ll oversee Senior Managers and matrix teams delivering Enabling Works, Major Civils, Networks and Buildings, ensuring compliance, performance, and integration across programmes and alliances.

• Lead cross‑programme planning with Civil Works, Nuclear Island, Conventional Island and alliance partners.
• Ensure resource planning, recruitment, and SQEP compliance.
• Direct teams to deliver against the Programme Execution Plan.
• Maintain strong stakeholder communication and execution of site strategies.
• Drive safety, quality, schedule, cost control and earned value management.
• Manage risks, issues, interfaces and programme changes.
• Ensure schedule integrity, delivery of the List of Deliverables, and continuous improvement.
• Fulfil delegated Principal Contractor obligations under CDM.
• Support lessons learned, knowledge capture, and best‑for‑project decision-making.
• Manage NEC/FIDIC contracts and commercial performance.
• Build effective relationships across all project teams.

• Proven delivery leadership within complex, highly regulated environments—ideally nuclear.
• Strong background in heavy civils, reinforced concrete, formwork systems, and major structures.
• Experience with EPCM delivery, contract strategies, procurement and commercial close‑out.
• Robust project controls capability (risk, schedule, change, EV).
• Experience working under ONR/EA/nuclear site licence regimes and safety culture principles.
• Competent with estimating, scheduling, risk tools and major construction contract management.
• Effective communicator with strong influencing, organisational and analytical skills.
• Understanding of EPR design highly desirable.

• Degree in Civil/Structural Engineering or Construction Management.
• Chartered Engineer (ICE/IStruct
  
  E/CIOB) preferred.
• Project management accreditation (APM, PRINCE2) beneficial.
• Full lifecycle project management experience and knowledge of nuclear‑grade quality standards.

Our values stand on a foundation of safety, integrity, inclusion and diversity. We put people at the heart of our business, and we genuinely believe that we…