Baseline & Change Engineer

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.

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: Nuclear Power Programmes has been formed with the vision to support positive change and help shape the future of Nuclear Power. Operational throughout the UK and across continental Europe, we are seeking to expand our team on a variety of nuclear projects, which range in technologies and that find themselves at different stages of their development. To do this, we are seeking to continuously employ talented individuals to join our diverse team that are excited about nuclear projects and are committed to Net Zero, and Energy Security.

About the Role: Join the Sizewell C (SZC) Project Controls team and help deliver one of the UK’s most significant infrastructure programmes. As a Baseline & Change Engineer, you’ll play a key supporting role in ensuring that all project changes are effectively captured, assessed, and governed. Working alongside the Baseline & Change Manager within the Programme Management Office (PMO), you’ll support the coordination and implementation of change control processes that ensure the project is delivered safely, on time, and within budget. This is an excellent opportunity for someone with early to mid‑level experience in project controls, PMO, or commercial management to develop their career on a major programme.

Key Responsibilities:

• Support the effective application of the change management process
• Assist in developing and maintaining change strategies and governance frameworks
• Support the facilitation of programme change committees
• Support the management of the programme baseline (scope, cost, schedule)
• Coordinate inputs across cost, schedule, and risk
• Ensure all changes are tracked, integrated, and communicated effectively
• Assist in producing monthly Baseline & Change reports
• Validate and maintain high‑quality change data and reporting outputs
• Ensure alignment of change activity with governance cycles
• Support Project Managers and Change Owners in applying change control procedures
• Work with delivery teams and PMO functions to ensure effective change implementation
• Provide guidance to improve understanding and compliance with governance standards
• Review and challenge change submissions
• Ensure all impacts (cost, schedule, risk) are properly assessed
• Support robust decision‑making through high‑quality data and documentation
• Assist in preparing materials for change committee meetings
• Support governance forums to operate efficiently with accurate information
• Ensure approved changes are correctly implemented across project systems
• Maintain consistency and integrity of programme‑wide data
• Provide guidance and training on change processes and tools
• Support continuous improvement of change capability across the programme

Here’s What You’ll Need:

• Degree (or equivalent experience) in a relevant discipline
• Experience in: Project Controls, PMO Programme or Commercial environments
• Understanding of: Change control processes, Governance frameworks, WBS / CBS structures
• Strong organisational and analytical skills
• Ability to manage multiple priorities in a fast‑paced environment
• Effective communication and stakeholder engagement skills

Desirable Experience:

• Knowledge of project controls tools and systems
• Experience working on large infrastructure or complex programmes
• Understanding of: Contract frameworks (e.g. NEC), Early warning processes and contractor/client workflows
• Exposure to change control within a structured baseline environment

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. 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.