At Amentum, we'll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow.  With more than 55,000 people in 40+ countries, working at Amentum offers 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 Amentum’s 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, 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 Amentum. 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 Amentum – Drive the UK’s Most Critical Infrastructure Programme

Amentum, in partnership with our client, is delivering the Non-Nuclear Engineering Partnership (NNEP) – a major programme covering all non-nuclear built environment assets.

We’re looking for a commercially driven Quantity Surveyor to help lead cost and contract management across high-security, nationally significant projects. This role spans the full project lifecycle – from tender to close-out – supporting delivery teams with planning, reporting, and change control, while ensuring data integrity. Your expertise will shape outcomes that matter. Apply now and help deliver critical infrastructure with lasting impact.

Key Tasks

•    High-Impact Projects: You’ll work on secure, long-term projects that genuinely shape the UK’s future infrastructure landscape.
•    Full Lifecycle Exposure: From early procurement strategy through to contract negotiation, administration, and final account closure, your commercial expertise will be central.
•    Collaborative Leadership: Partner with Project Managers, Controls teams, and Operational leads—shaping commercial outcomes and mentoring others along the way.
•    Dynamic Environment: Operate at the forefront of NEC contract management and strategic subcontractor engagement in a fast-paced, technically complex environment.
•    Guide and coach operational teams on contracts, procurement, risk and profitability.
•    Shape and manage subcontract strategy using NEC suite contracts.
•    Work closely with Project Controls to ensure accurate cost forecasting and performance reporting.
•    Drive commercial clarity and resolve issues before they escalate.
•    Support strategic decision-making with business development and delivery teams.

Qualifications and Experience

•    Degree in Quantity Surveying, Law, Engineering, Finance or Commerce (preferred).
•    Solid NEC3/4 experience and contract law know-how.
•    Proven success in commercial roles with leading infrastructure or construction contractors.
•    Strong communication and stakeholder management skills.
•    Eligible for UK security clearance.

Our values stand on a foundation of safety, integrity, inclusion and diversity. We put people at the heart of our business and we truly believe that by supporting one another through our culture of caring, we all succeed. We value positive mental health and a sense of belonging for all employees. Find out more about life at Amentum.

We aim to embed inclusion and diversity in everything we do. We know that if we are inclusive, we’re more connected, and if we are diverse, 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 centred on inclusion and diversity – ACE, Careers, Enlace, Harambee, OneWorld, Prism, Vetnet, and Women’s – find out more about our employee networks here.

Amentum partners 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 let us know

Your application experience is important to us and we’re keen to adapt to make every interaction even better. We welcome feedback on our recruitment process and if you need more from us before deciding to join Amentum then please let us know.

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 Labor Laws Posters.