United Kingdom






Military-Friendly Employer

Amentum is a global leader in engineering, project and programme management and solutions integration.

Founded on programme, project and engineering experience, combined with deep-seated specialist capabilities, Amentum has become a recognised delivery partner across major UK Government and commercial programmes.

We work with our clients, partners and communities to safely and cost-effectively deliver the right solutions. We’ve earned our customers’ trust to successfully manage and execute the most complex programmes of scale and provide them with solutions they need for an unpredictable world.

Delivering a Safer, Smarter, Cleaner world.

Why Choose Amentum


Decommissioning & Waste Mangement




Our Unique Capabilities

Amentum has demonstrable expertise delivering complex programme and project management for UK Government major projects and infrastructure.

Feature Project: Management & Operation of Sellafield Ltd, UK | Amentum

We safely operate facilities of national significance, injecting innovation that increases efficiency and effectiveness.

We understand the need to view projects wholistically – build, secure, operate, and integrate.

Feature Project: Construction of Low-Level Waste Vaults at Dounreay | Amentum

Amentum UK possesses an innate knowledge of the UK’s national nuclear landscape, having been involved in the design and delivery of much of the UK Government’s nuclear waste strategy.

Feature Project: Decommissioning Plutonium Contaminated Material Facilities at the LLWR, UK | Amentum

Amentum leverages industry-leading expertise, processes, and technology to ensure the availability and reliability of our government and commercial clients’ vital equipment. Our innovative technology solutions, repeatable processes, and expertise ensure operational readiness and extend the life of facilities and equipment.

Feature Project: Management & Operations of LLW Repository Ltd (LLWR), UK | Amentum

As majority partner responsible for the management and operation of the Low Level Waste Repository (LLWR) in the UK, Amentum resolved an urgent need to expand waste disposal capacity, avoiding delays to UK’s decommissioning activity.

Sourcing an alternative LLWR site would have been a lengthy process with an expected cost of over £2 billion.

Amentum’s strategy involved fostering a collaborative approach with the customer and regulator, ultimately delivering upgrades to existing facilities and construction of an additional vault to extend the facilities operational life by 100 years.

In addition Amentum provided an additional 10 waste disposal and treatment routes, which avoided a further £455m in disposal costs.

Feature Project: Management & Operations of LLW Repository Ltd (LLWR), UK | Amentum

Amentum has successfully decontaminated and decommissioned large scale, contaminated facilities. Our collaborative approach focuses on safe and accelerated delivery schedules based on lessons learned and continuous improvement. We are able to challenge existing processes to deliver improvements for our customers.

Feature Project: Management & Operations of LLW Repository Ltd (LLWR), UK | Amentum

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We specialize in the design, construction, commissioning, and operations of innovative solutions for the world’s most complex challenges. We’re positioned to deliver hydrogen technology through a series of demonstration projects to achieve a secure, resilient, and clean energy source by 2030. We’re eager to partner with you to build a clean, resilient, secure energy future.

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