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In deliveryUnited KingdomServices£600,000,000

Owner's Engineer

Published
Published 22 April 2025
Deadline
Closed 9 July 2025

Overview

The OE will provide essential independent assurance to the Intelligent Customer and Intelligent Client for the Small Modular Reactor project. This will support the deployment of first-of-a-kind nuclear technology in the UK and facilitate GBE-N's goal of reaching a Final Investment Decision. In particular, the OE will act as a 'client friend' to the Intelligent Customer and Intelligent Client and provide competent resource to undertake specification, oversight, audit, review and advice for decisions relating to design, scope, budget, risk, delivery and contract compliance. It will also play the role of subject matter expert to deliver independent technical and delivery Line of Defence 2 assurance on major design and build contracts. The maximum total contract value is £300m. However, it is not possible to predict an exact outturn value at this stage due to the length of the contract and inherent uncertainties in scope, which drive variability in the volume of work instructed. In addition, progression through design stages and associated milestones or gates will determine the timing and extent of services required, potentially influencing the overall contract value over time. As envisaged in the tender notice, the duration of the OE contract will depend on matters agreed with the SMR Technology Partner. The current assumption remains that the OE contract will have a 14-year term, but a completion date will be set during the term of the contract in accordance with its terms and to reflect the term of the SMR Technology Partner contract.

Key details

Country
United Kingdom
Status
In delivery
Category
Services
Estimated value
£600,000,000
Procedure
Selective
SME suitable
Yes
Published
22 April 2025
Questions by
2 July 2025
Deadline
Closed
Classification (CPV)
Engineering servicesConstruction-related servicesTechnical testing, analysis and consultancy servicesSafety consultancy services

Award outcome

Awarded value
£600,000,000
Award date
9 February 2026
Contract period
26 March 2026 → 27 March 2040
Winners
  • AMENTUM CLEAN ENERGY LIMITED
  • CAVENDISH NUCLEAR LIMITED

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Notice history

Every published notice in this contracting process, newest first.

  1. Contract

    29 June 2026

    View notice ↗
  2. Contract

    30 April 2026

    View notice ↗
  3. Contract

    9 February 2026

    View notice ↗
  4. Tender Update

    2 July 2025

    View notice ↗
  5. Tender Update

    17 June 2025

    View notice ↗
  6. Tender Update

    4 June 2025

    View notice ↗
  7. Contract Notice

    3 June 2025

    View notice ↗
  8. Prior Information Notice

    12 May 2025

    View notice ↗
  9. Planning Update

    30 April 2025

    View notice ↗
  10. Planning Update

    28 April 2025

    View notice ↗
  11. Prior Information Notice

    22 April 2025

    View notice ↗
  12. Prior Information Notice

    22 April 2025

    View notice ↗

Contracting authority

  • GREAT BRITISH ENERGY - NUCLEAR

    Buyer

    London, United Kingdom

    GB-COH: 05027024

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Awarded: Owner's Engineer — won by AMENTUM CLEAN ENERGY LIMITED +1 — Skim