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.

About the opportunity:

Join the Sizewell C megaproject, contributing to a major low‑carbon nuclear new build. This role sits within the Engineering & Technical function, overseeing technical requirements, design delivery, assurance, and coordination of ancillary civil works across the programme lifecycle.

You will define and validate technical requirements, lead technical assurance, manage design changes, and coordinate multi‑disciplinary interfaces. The role ensures compliance with engineering processes and supports delivery of fully coordinated civil designs across the Ancillary Works scope.

Key Responsibilities

Reporting to the E&T Programme Engineering Manager, the Ancillary Works Civil Technical & Engineering Manager is part of a Multi-Disciplinary Team lead team and is a representative of the SZC Technical Directorate team.

• Define and validate SZC technical requirements and specifications.

• Support Design Technical Assurance (including digital) to enable SZC acceptance.

• Ensure all design deliverables are fully coordinated, including within 3D environments.

• Provide technical input into Early Warnings, Compensation Events, TQs and supply chain communications.

• Integrate construction methodology and site logistics into design requirements.

• Manage technical interfaces (Site Establishment, Offsite Infrastructure, NI Programme, CIBOP, SZB).

• Ensure compliance with SZC engineering/design processes and CDM duties.

• Support delivery of design to contract schedules and the integrated work schedule (IWS).

• Perform surveillance, manage open points and risks, maintain risk registers.

Here's What You'll Need:

Essential

• Strong experience across concept to construction stage for heavy civils, ground engineering, drainage, utilities, earthworks, structures, and/or external works.

• Essential: Degree in Civil/Structural Engineering; Chartered or working towards.

• Skilled in design integration and managing multi‑disciplinary technical delivery.

• Knowledge of UK design standards and RIBA Plan of Work.

• Experience in high‑safety or regulated environments.

• Strong stakeholder communication.

Desirable

• Familiarity with EPR nuclear design and NEC contracts.

• Experience with engineering management systems and documentation workflows.

• Experience in major/complex projects, ideally nuclear (e.g., HPC).

Our Culture

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 all succeed by supporting one another through our culture of caring. We value positive mental health and a sense of belonging for all employees.

We aim to embed inclusion in everything we do. We know that if we are inclusive, we’re more connected, and we’re more creative. We accept people for who they are, regardless of age, disability, gender identity, gender expression, marital status, mental health, race, faith or belief, sexual orientation, socioeconomic background, and whether you’re pregnant or on family leave. This is reflected in our wide range of Global Employee Networks.

We partner with VERCIDA to help us attract and retain diverse talent. For greater online accessibility, please visit www.vercida.com to view and access our roles. As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.

If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact matt.jones1@global.amentum