Source: https://tendernation.io/suppliers/amentum-clean-energy Supplier profile # AMENTUM CLEAN ENERGY LIMITED Public sector contracts won, from published award notices Large business[Companies House 01120437](https://find-and-update.company-information.service.gov.uk/company/01120437) [ Follow competitor](/login "Sign in to follow competitors")[ Compete for this work](/register) Contracts won 147 since 16 Oct 2017 Total awarded £69,203,062 where values were published Buyers 35 public bodies Latest win 13 Oct 2026 ## Contracts ending soon Contracts ending in the next 18 months. Buyers usually re-tender before the end date, so these are openings for competitors. - [DNWP0053/LOT1A/CALDER F199 Demolition](https://tendernation.io/opportunities/01a13d18-76c0-715b-9bd2-800c5d170ccc/dnwp0053lot1acalder-f199-demolition)[Sellafield Ltd](https://tendernation.io/buyers/sellafield-ltd) £152,895 Ends 30 Oct 2026 - [Corrosion Testing Framework for STEP](https://tendernation.io/opportunities/01a13b92-6eb2-71cf-89be-e289aad1508d/corrosion-testing-framework-for-step)[UK Fusion Energy Ltd](https://tendernation.io/buyers/uk-fusion-energy-ltd) Value not counted: framework or estimated ceiling Ends 2 Nov 2026 - [(05 - SF&NM) GK25-13](https://tendernation.io/opportunities/01a13d1c-1c94-70d2-bf36-2b6713685831/05-sfnm-gk25-13)[Nuclear Decommissioning Authority](https://tendernation.io/buyers/nuclear-decommissioning-authority) £104,246 Ends 2 Nov 2026 - [GK25-12](https://tendernation.io/opportunities/01a13d21-e62f-71e3-a51a-da908a8a9209/gk25-12)[Nuclear Decommissioning Authority](https://tendernation.io/buyers/nuclear-decommissioning-authority) £94,689 Ends 20 Nov 2026 - [(04 - SF&NM) GK25-14](https://tendernation.io/opportunities/01a13cfc-387d-7197-8faa-52198662aca0/04-sfnm-gk25-14)[Nuclear Decommissioning Authority](https://tendernation.io/buyers/nuclear-decommissioning-authority) £148,237 Ends 24 Nov 2026 - [W2B5 4-point bend: A](https://tendernation.io/opportunities/01a13be6-e178-7343-9af3-30ab77d2f4fd/w2b5-4-point-bend-a)[UK Fusion Energy Ltd](https://tendernation.io/buyers/uk-fusion-energy-ltd) £33,173 Ends 27 Nov 2026 - [Prototype Fast Reactor Concrete Panels Methodology](https://tendernation.io/opportunities/01a13d1f-7bd9-7198-a67a-c966da7994c1/prototype-fast-reactor-concrete-panels-methodology)[NRS Dounreay](https://tendernation.io/buyers/nrs-dounreay) £93,798 Ends 4 Dec 2026 - [DNWP0039/LOT1A/Management Team FY26/27](https://tendernation.io/opportunities/01a13d1e-71d8-732f-8c81-5b8cbc8e1d6f/dnwp0039lot1amanagement-team-fy2627)[Sellafield Limited](https://tendernation.io/buyers/sellafield-limited) £4,084,270 Ends 31 Mar 2027 - [Pd Ag Functional Testing](https://tendernation.io/opportunities/01a13bdf-d052-71a5-bb72-6982de29dd3b/pd-ag-functional-testing)[UK Fusion Energy Ltd](https://tendernation.io/buyers/uk-fusion-energy-ltd) £195,000 Ends 31 Mar 2027 - [CSSF-001 - Support to international post closure criticality safety projects.](https://tendernation.io/opportunities/01a13d19-2d3c-72a7-9407-739c74ce24e1/cssf-001-support-to-international-post-closure-criticality-safety-projects)[Nuclear Waste Services](https://tendernation.io/buyers/nuclear-waste-services) £10,000 Ends 31 Mar 2027 ## Recent contract awards - [Corrosion Testing Framework for STEP](https://tendernation.io/opportunities/01a13b92-6eb2-71cf-89be-e289aad1508d/corrosion-testing-framework-for-step)[UK Fusion Energy Ltd](https://tendernation.io/buyers/uk-fusion-energy-ltd) Value not counted: framework or estimated ceiling 13 Oct 2026 - [Corrosion Testing Framework for STEP](https://tendernation.io/opportunities/01a13b92-6eb2-71cf-89be-e289aad1508d/corrosion-testing-framework-for-step)[UK Fusion Energy Ltd](https://tendernation.io/buyers/uk-fusion-energy-ltd) Value not counted: framework or estimated ceiling 13 Oct 2026 - [Corrosion Testing Framework for STEP](https://tendernation.io/opportunities/01a13b92-6eb2-71cf-89be-e289aad1508d/corrosion-testing-framework-for-step)[UK Fusion Energy Ltd](https://tendernation.io/buyers/uk-fusion-energy-ltd) Value not counted: framework or estimated ceiling 13 Oct 2026 - [DNWP0072/LOT1A/ THB Demolition Phases 1-5](https://tendernation.io/opportunities/01a13d23-6496-7342-8bbb-3351cbae56b0/dnwp0072lot1a-thb-demolition-phases-1-5)[Sellafield Limited](https://tendernation.io/buyers/sellafield-limited) £14,848,365 30 Sept 2026 - [DNWP0071/LOT1A/CALDER Ring Fence](https://tendernation.io/opportunities/01a13d24-1f00-73d7-88e0-7e4ce431bb5e/dnwp0071lot1acalder-ring-fence)[Sellafield Ltd](https://tendernation.io/buyers/sellafield-ltd) £478,697 14 Sept 2026 - [DNWP0040/LOT1A/ HEx-1 Laydown area excavation and pour](https://tendernation.io/opportunities/01a13d1d-b727-7253-870b-036f954ba0e7/dnwp0040lot1a-hex-1-laydown-area-excavation-and-pour)[Sellafield Ltd](https://tendernation.io/buyers/sellafield-ltd) £3,425,940 9 Sept 2026 - [DNWP0039/LOT1A/Management Team FY26/27](https://tendernation.io/opportunities/01a13d1e-71d8-732f-8c81-5b8cbc8e1d6f/dnwp0039lot1amanagement-team-fy2627)[Sellafield Limited](https://tendernation.io/buyers/sellafield-limited) £4,084,270 8 Sept 2026 - [UVDB Powered by Achilles QUDM for Goods, Works and Services](https://tendernation.io/opportunities/01a13bcb-b64e-713c-bee2-314cc6e09df2/uvdb-powered-by-achilles-qudm-for-goods-works-and-services)[Affinity Water Limited](https://tendernation.io/buyers/affinity-water-limited) Value not published 19 Aug 2026 - [W2B5 4-point bend: A](https://tendernation.io/opportunities/01a13be6-e178-7343-9af3-30ab77d2f4fd/w2b5-4-point-bend-a)[UK Fusion Energy Ltd](https://tendernation.io/buyers/uk-fusion-energy-ltd) £33,173 4 Aug 2026 - [Open Framework for Nuclear Technical Services](https://tendernation.io/opportunities/01a13bdd-bcf6-726c-8d20-21a4fd9a2ac4/open-framework-for-nuclear-technical-services)[United Kingdom National Nuclear Laboratory Limited](https://tendernation.io/buyers/united-kingdom-national-nuclear-laboratory-limited) Value not published 29 Jul 2026 - [Open Framework for Nuclear Technical Services](https://tendernation.io/opportunities/01a13bdd-bcf6-726c-8d20-21a4fd9a2ac4/open-framework-for-nuclear-technical-services)[United Kingdom National Nuclear Laboratory Limited](https://tendernation.io/buyers/united-kingdom-national-nuclear-laboratory-limited) Value not published 29 Jul 2026 - [Open Framework for Nuclear Technical Services](https://tendernation.io/opportunities/01a13bdd-bcf6-726c-8d20-21a4fd9a2ac4/open-framework-for-nuclear-technical-services)[United Kingdom National Nuclear Laboratory Limited](https://tendernation.io/buyers/united-kingdom-national-nuclear-laboratory-limited) Value not published 29 Jul 2026 - [Open Framework for Nuclear Technical Services](https://tendernation.io/opportunities/01a13bdd-bcf6-726c-8d20-21a4fd9a2ac4/open-framework-for-nuclear-technical-services)[United Kingdom National Nuclear Laboratory Limited](https://tendernation.io/buyers/united-kingdom-national-nuclear-laboratory-limited) Value not published 29 Jul 2026 - [Open Framework for Nuclear Technical Services](https://tendernation.io/opportunities/01a13bdd-bcf6-726c-8d20-21a4fd9a2ac4/open-framework-for-nuclear-technical-services)[United Kingdom National Nuclear Laboratory Limited](https://tendernation.io/buyers/united-kingdom-national-nuclear-laboratory-limited) Value not published 29 Jul 2026 - [Open Framework for Nuclear Technical Services](https://tendernation.io/opportunities/01a13bdd-bcf6-726c-8d20-21a4fd9a2ac4/open-framework-for-nuclear-technical-services)[United Kingdom National Nuclear Laboratory Limited](https://tendernation.io/buyers/united-kingdom-national-nuclear-laboratory-limited) Value not published 29 Jul 2026 ## Companies House Accounts overdue at Companies House StatusActive Incorporated28 Jun 1973 (53 yrs) AccountsFull IndustryConstruction of utility projects for electricity and telecommunications [View filing history](https://find-and-update.company-information.service.gov.uk/company/01120437)## Who they win from - [Radioactive Waste Management Limited55 wins](https://tendernation.io/buyers/radioactive-waste-management-limited) - [Nuclear Decommissioning Authority10 wins](https://tendernation.io/buyers/nuclear-decommissioning-authority) - [Nuclear Waste Services9 wins](https://tendernation.io/buyers/nuclear-waste-services) - [Sellafield Ltd8 wins](https://tendernation.io/buyers/sellafield-ltd) - [Sellafield Limited5 wins](https://tendernation.io/buyers/sellafield-limited) - [Nuclear Restoration Services Limited (Dounreay)5 wins](https://tendernation.io/buyers/nuclear-restoration-services-limited-dounreay) - [UK Atomic Energy Authority5 wins](https://tendernation.io/buyers/uk-atomic-energy-authority) - [Nuclear Waste Services Limited5 wins](https://tendernation.io/buyers/nuclear-waste-services-limited) ## How fast they pay suppliers 27 days on average (previously 26) 82% of invoices paid within 30 days · 5% after 60 days · 18% not paid within agreed terms [Report for 31 Mar 2025 (GOV.UK)](https://check-payment-practices.service.gov.uk/report/96973)## Bids named on award notices Bid for 7 contracts: won 6, lost 1. - [Lost: Department for Energy Security & Net Zero](https://tendernation.io/opportunities/01a13bcd-4dad-7030-98f4-56164433a45c)30 Sept 2026 Award notices have listed every bidder only since the Procurement Act (February 2025). ## Paid by (last 12 months) - [Nuclear Waste Services](https://tendernation.io/buyers/nuclear-waste-services)£6,675,722 - [Ministry of Defence](https://tendernation.io/buyers/ministry-of-defence)£2,639,429 - [Department for Environment, Food & Rural Affairs](https://tendernation.io/buyers/department-for-environment-food-rural-affairs)£25,138 From councils' published spending over £500. ## On government frameworks - [Digital and IT Professional Services (DIPS)](https://tendernation.io/frameworks/RM6249)RM6249 · ends 16 Nov 2027 - [Technology Services 4](https://tendernation.io/frameworks/RM6190)RM6190 · ends 11 Jun 2028 - [Cyber Security Services 3](https://tendernation.io/frameworks/RM3764.3)RM3764.3 · ends 13 Feb 2029 - [Construction Professional Services 2](https://tendernation.io/frameworks/RM6356)RM6356 · ends 16 Apr 2030 ## What they win - [Research & development](https://tendernation.io/sectors/research-development)75 - [Architecture, engineering & surveying](https://tendernation.io/sectors/architecture-engineering-surveying)22 - [Sewage, refuse, cleaning & environmental](https://tendernation.io/sectors/sewage-refuse-cleaning-environmental)11 - [Business services](https://tendernation.io/sectors/business-services)8 - [IT services](https://tendernation.io/sectors/it-services)7 - [Other community & personal services](https://tendernation.io/sectors/community-personal-services)5 Competing with AMENTUM CLEAN ENERGY LIMITED? 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