The headlines, the numbers, and why this account moves now.
Everything on this tab is a dated observed fact from public record. Hover any claim to see the source. Full source index in the last tab.
Headline figures
Why this account moves now
Atos position today
Atos has been the NDA-group IT incumbent since 2012 under the £140m Shared Services Alliance covering 18,000 users, 30 locations and 19 service towers across the NDA group. Coverage extends across Sellafield Ltd and the wider NDA family. The Stack confirmed in January 2025 that Eviden 'continues to work with Sellafield' after the Atos group restructure, alongside the Darktrace £2.6m renewal.
What is scheduled next
Sellafield calls competition under Lots 4 & 5 of CCS TS4 (RM6190). Lot 4 covers ICT Hosted Infrastructure Management (£48.23m ex VAT). Lot 5 covers ICT Application Management for ~118 apps including SAP and Azure workloads (£41.51m ex VAT). Competition anticipated late May 2026. Contracts targeting April 2027. April 2032, extendable to April 2034.
Eight events between October 2024 and September 2026.
Past events and scheduled dates on one chronological axis. Every entry sourced. Colour groups the event type.
Eight people who shape the IAMS outcome.
Each person carries their role, their sourced prior-role facts, and. where publicly evidenced. the pattern that predicts how they buy. Where no pattern is evidenced, that is stated.
Recent public record. Public defence of Sellafield IT posture after 'Nuclear Leaks' allegations (BBC, 18 Dec 2023). Personally invested in the cyber narrative. Named accountable owner of the IAMS outcome.
Source · gov.uk
Named in the record. Confirmed as Chair in the Sellafield Annual Report and Accounts 2024-2025.
Source · Sellafield ARA 2024-2025
Recent public record. First IAMS-scale procurement decision on her watch. No prior-role technology-sourcing pattern in the public record from her published biography.
Source · Sellafield ARA 2024-2025
Recent public record. Named on Sellafield's published leadership page. Responsibility for digital services, cyber resilience and data. Named accountable owner for IAMS and SAP.
Prior role. Managing Director, Grays IT Limited. 20+ years IT leadership, transformation and modernisation.
Source · gov.uk
Recent public record. ONR (19 Nov 2025) credited the new CISO appointment as 'reinforcing strategic direction'.
Prior roles. Home Office. Head of Cyber Security Operations. Foreign Office. CISO. Successor to Richard Meal (Head of Information Security 10+ years, ex-RAF, stepped down 27 March 2024).
Source · thestack.technology
Recent public record. Joined March 2022 as Head of Retrievals Value Stream. 20+ years project/programme portfolio and transformation experience. Natural home for OT-safe retrievals-tooling conversations, separate from IAMS.
Source · politicshome.com
Named in the record. Listed on the Sellafield Ltd published leadership page.
Source · gov.uk
Recent public record. Advertised as open in January 2025 supporting strategic projects with security architecture requirements. The architecture backbone of the IAMS-era rebuild is still forming.
Source · thestack.technology
How money moves from programme envelopes to named vendors.
Every published contract we could evidence, sequenced by scale. Framed as reported facts, not commentary.
| Workstream | Vendor | Value / detail | Status | Source |
|---|---|---|---|---|
| IAMS successor · Lots 4 & 5 | Competition opens late May 2026 | £48.23m (Lot 4) + £41.51m (Lot 5) ex VAT · ~118 apps including SAP and Azure · contracts through 2034 | Scheduled | FTS 060974-2025 |
| IT / cyber long-standing | Atos (Eviden) | Continuous since 2012 NDA SSA (£140m). Sellafield-specific 2yr extension Oct 2020. WER-7148 SAM project services 2025. | Incumbent | thestack.technology |
| PICTS #1 Service Desk & EUS | Modification notice Jul 2025 | £13m modification issued 11 July 2025 under CCS TS2 RM3804 four-lot award (2021). | Live modification | FTS |
| PICTS #9 On-Site Networks | Re-competition Q1 2026/27 | Listed in Sellafield Q1 2026/27 Procurement Plan. | Re-competing | Procurement Plan |
| Cyber threat detection | Darktrace | £2.6m 2-year renewal signed 8 Jan 2025, 12 weeks after the ONR fine. Includes 10 days professional services / year. | Live · Jan 2027 | thestack.technology |
| Non-Nuclear Infrastructure | Morgan Sindall Infrastructure · Costain · HOCHTIEF (UK) | £2.9bn · 9-year (+6) arrangement for site-wide non-nuclear infrastructure works through 2040 · awarded 13 Oct 2025. | Live | gov.uk |
| DNWP framework | Amentum · AtkinsRéalis · Westinghouse ES UK · Altrad · Cavendish Nuclear · Shepley Engineers | £4.6bn / 15 years · awarded 31 Oct 2025 for high-hazard risk reduction across four lots. | Live | gov.uk |
| PPP Lot 1 · Integration | KBR | 20-year framework · 2019 · £7bn+ · through 2039. | Live | neccontract.com |
| PPP Lot 2 · Design & Engineering | Jacobs | 20-year framework · through 2039. | Live | neccontract.com |
| Design & Engineering long-term | Wood | £770m · 20-year design & engineering partner · 2019 · through 2039. | Live | BBC |
| PPP Mechanical & Pipework | Balfour Beatty Kilpatrick · Doosan Babcock | £112-£237m · March 2022. | Live | gov.uk |
Eleven public vendor positions across Sellafield's contract landscape.
Only vendors with a dated, sourced position on the estate. Framed by workstream so overlap with Atos scope is visible.
Four dated Westminster and regulatory events that shape the estate.
Each entry is a public forum record with named speakers, quotes where captured, and the source.
Every source cited across this account, in one place.
Each line is the fact it supports followed by the URL. Every claim on this account resolves to one of these.
- IAMS pipeline notice · £107.69m through 2034. Find a Tender 060974-2025, originally 30 September 2025, updated 2 March 2026. find-tender.service.gov.uk/Notice/060974-2025
- ONR eases cyber attention level. 19 November 2025. onr.org.uk/news/all-news/2025/11/onr-recognises-cyber-security-improvements-at-sellafield
- ONR fine £332,500. 2 October 2024. onr.org.uk/news/all-news/2024/10/sellafield-ltd-fined-332-500-for-cyber-security-shortfalls
- Euan Hutton confirmed permanent CEO. 1 November 2024. gov.uk/government/news/euan-hutton-permanently-appointed-as-sellafield-ceo
- Chris Train OBE Chair · Nicola O'Keeffe CFO. Sellafield Annual Report and Accounts 2024-2025. assets.publishing.service.gov.uk / Sellafield ARA 2024-2025
- Graeme Slater · CDIO. gov.uk people page. gov.uk/government/people/graeme-slater
- New CISO · Darktrace renewal · Eviden continuity. The Stack, 8 January 2025. thestack.technology/sellafield-darktrace-licences
- £2.9bn Non-Nuclear Infrastructure contracts. 13 October 2025. gov.uk/government/news/sellafield-ltd-awards-29bn-infrastructure-contracts
- £4.6bn DNWP framework. 31 October 2025. gov.uk/government/news/sellafield-ltd-awards-high-hazard-risk-reduction-framework-contract
- Retrievals milestone · 70 tonnes from MSSS. 30 October 2025. gov.uk/government/news/sellafields-most-complex-clean-up-job-reaches-major-milestone
- SIXEP Continuity Plant · 75% complete. 18 August 2026. gov.uk/government/news/latest-crane-lifts-mark-major-progress-on-sixep-continuity-plant
- PICTS #1 modification £13m. 11 July 2025. find-tender.service.gov.uk / ocds-h6vhtk-0558f2
- Sellafield Q1 2026/27 Procurement Plan. Cross-programme pipeline. Sellafield Q1 2026/27 Procurement Plan
- PPP framework · KBR · Jacobs. neccontract.com/projects/sellafield-programme-and-project-partners-ppp-framework-uk
- Wood £770m 20-year Design & Engineering. BBC News, 2019. bbc.com/news/uk-scotland-scotland-business-48213428
- PAC decommissioning oral evidence. 20 March 2025. committees.parliament.uk/publications/48128/documents/252127/default
- Hansard Adjournment Debate · Nuclear Industry: Cumbria. 14 October 2024. hansard.parliament.uk / 14 October 2024
- Sellafield Ltd published leadership page. gov.uk/government/organisations/sellafield-ltd