Amentum Secures Prime Positions on Multi-billion Pound Sellafield Decommissioning Framework

Strategic Insights -

Amentum, a leading provider of technical and engineering services, has won prime positions on a new multi-billion pound framework to deliver expert decommissioning solutions for the Sellafield nuclear site in the United Kingdom. Under the 15-year Decommissioning and Nuclear Waste Partnership (DNWP) framework, Amentum will carry out remediation work on disused facilities and retrieve hazardous waste from legacy ponds on the site in Cumbria, England.

Key Takeaways:

  • Amentum has secured positions on a new multi-billion pound framework to deliver expert decommissioning solutions for the Sellafield nuclear site in the UK.
  • The 15-year Decommissioning and Nuclear Waste Partnership (DNWP) framework will see Amentum carry out remediation work on disused facilities and retrieve hazardous waste from legacy ponds.
  • Amentum's share of the work could be worth up to an estimated value of £1.4 billion (approximately $1.9 billion USD).
  • Amentum's focus will be on waste-led decommissioning, including clearance of redundant buildings and preparatory decommissioning work on the UK's oldest nuclear reactor complexes and fuel handling facilities.
  • Amentum will deploy a full suite of technical offerings, including digital visualisation, geospatial data analysis, robotics, and AI-based tools, to optimise end-states integration and accelerate retrievals.
  • The DNWP framework covers operational nuclear facilities and those undergoing post-operational clean out, decommissioning, and demolition.
  • Amentum's specialist teams will also assist procurement and operational delivery of goods and services across the whole of the UK Ministry of Defence.
  • Amentum's experience in the UK includes delivery partner for Hinkley Point C, sole program and project management delivery partner at Sizewell C, and supports the country's existing nuclear power stations under a Lifetime Enterprise Agreement with EDF.
  • Amentum has a significant presence in the UK, with over 6,000 employees in the country.

Statistics:

  • Amentum's share of the work on the Sellafield decommissioning framework could be worth up to £1.4 billion (approximately $1.9 billion USD).
  • The DNWP framework covers operational nuclear facilities and those undergoing post-operational clean out, decommissioning, and demolition on the Sellafield site.
  • The 15-year framework will see Amentum carry out remediation work on disused facilities and retrieve hazardous waste from legacy ponds.
  • Amentum's experience in the UK includes delivery partner for Hinkley Point C, sole program and project management delivery partner at Sizewell C, and supports the country's existing nuclear power stations under a Lifetime Enterprise Agreement with EDF.
  • Amentum has over 6,000 employees in the UK and is a major supplier of engineering design, safety case, and project management services at Sellafield and other UK nuclear decommissioning sites.

Sources:

  • Amentum Holdings, Inc. press release: Amentum Wins Prime Positions on Multi-billion Pound Sellafield Decommissioning Framework (October 31, 2025)
  • Amentum website: [www.amentum.com](http://www.amentum.com)
  • Amentum LinkedIn page: [www.linkedin.com/company/amentum](http://www.linkedin.com/company/amentum)