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 diversity, and 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. We also give back to our communities through our Collectively program which incorporates matched-funding, paid volunteering time and charitable donations.
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.
In both client facing and internal roles we are delivering major programme and project management capabilities throughout the project lifecycle. We are driving to deliver safe, high quality and to time solutions by thinking innovatively and working collaboratively.
Amentum are recruiting for a Cost Manager reporting directly to the Cost Lead, you'll support the delivery of accurate and timely project information relating to performance against the project baseline and be responsible for administering effective cost control, as part of the programme’s integrated delivery team.
You'll drive the cost performance reporting for the Programme including EV analysis associated with key commitments and expenditures, the role will encompass responsibility for the collation and analysis of Programme Cost Information in accordance with the Cost Management Policy and Procedures, supporting adherence to timely and accurate submissions from the Project Teams. Close liaison with the Commercial and Finance teams to ensure accurate accruals and contract cost performance is captured appropriately and effective analysis is undertaken against the baseline. Key responsibilities will be:
1. Supporting the Cost Lead with the implementation of appropriate cost systems, procedures and working templates.
2. Support to Project teams to ensure timely and accurate cost information submission on a regular basis, to include reporting and comparison to the baseline.
3. Tracking of actual costs against appropriate cost control structures.
4. Support the Cost Lead in executing cost re-baseline exercises, forecast and budget updates as appropriate.
5. Undertake analyses of the Project Cost information to support Programme objectives incl. earned value, trend analysis.
6. Work closely with the finance and commercial teams to ensure accurate accruals and contract costs are included within the overall EAC and performance reports.
7. Analysis of Change Requests ensuring cost data is correctly identified/coded (CBS) and change requests are aligned with budgets.
8. Responsible for supporting the project teams in the use of the cost tools, acting as point of contact for basic user support/training.
Here's What You'll Need
9. Excellent Excel and Microsoft Office skills.
10. Ability to communicate cost and performance information to peers/managers.
11. Pro-active and able to thrive in a fast-past and dynamic environment.
12. Good attention to detail and skilled in interpreting and analysing cost data.
13. Comfortable with challenging assumptions and processes in order to constantly improve the delivery of performance data.
14. Working knowledge of cost management functions, including cost estimating, cost control, and cost analysis.
15. Experience of identifying, analysing, and solving problems.
16. Working knowledge of Cost management/forecasting tools (such as PRISM/ EcoSys/ Cobra).
17. Understanding of Earned Value Methodologies.
18. Experienced in working within Project Controls in a Major Programme 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. For greater online accessibility, please visit 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 the team.
Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at .