System operational · UK tenders

Buyer profile

NATIONAL ENERGY SYSTEM OPERATOR LIMITED

otherUKJ11englandGB

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Total contracts

46

Known spend

£454m

25 disclosed

Average value

£18m

Per contract

Active suppliers

10

Last 5 years

Open0Awarded22Closed3

Top suppliers

Last 5 years
  1. 1

    Efficio Limited

    3 winslatest 09 Feb 2026CH 04010379

    £8m

  2. 2

    GOWLING WLG (UK) LLP

    2 winslatest 23 Apr 2026CH OC304378

    £18m

  3. 3

    DLA PIPER UK LLP

    2 winslatest 11 Aug 2026CH OC307847

    £17m

  4. 4

    TLT LLP

    2 winslatest 21 Jul 2026CH OC308658

    £11m

  5. 5

    PALANTIR TECHNOLOGIES UK, LTD.

    1 winlatest 06 Oct 2026CH 07042994

    £17m

  6. 6

    SHAKESPEARE MARTINEAU LLP

    1 winlatest 15 Jan 2026CH OC319029

    £17m

  7. 7

    DENTONS UK AND MIDDLE EAST LLP

    1 winlatest 15 Jan 2026CH OC322045

    £17m

  8. 8

    ADDLESHAW GODDARD LLP

    1 winlatest 15 Jan 2026CH OC318149

    £17m

  9. 9

    SOFTCAT PLC

    1 winlatest 01 Aug 2026

    £14m

  10. 10

    SALESFORCE UK LIMITED

    1 winlatest 26 Jun 2026CH 05094083

    £4m

What they buy

By CPV category
  • IT servicesCPV 72

    5 contracts · £3m

  • Business servicesCPV 79

    4 contracts · £10m

  • SoftwareCPV 48

    2 contracts · £12m

Companies House

NATIONAL ENERGY SYSTEM OPERATOR LIMITED · 11014226active

View on gov.uk ↗

Incorporated

Oct 2017

Last accounts filed

Mar 2025

Next accounts due

Dec 2026

Active officers

14

Active officers

  • FAVIER-TILSTON, Clairesecretary
  • MORRISSEY, Zoe Elisesecretary
  • CRACKETT, Johndirector
  • DUFFY, Clare Siobhandirector
  • FITZGERALD, Emma, Drdirector
  • GOLBY, Paul, Drdirector
  • LEGGE, Kayte Anne Evedirector
  • LINWOOD, John Frederickdirector

SIC codes

96090

Tender activity

Notices published per month — last 24 months

14 active months
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All contracts (46)

N
ocds-h6vhtk-077e85 · award

HPE CNI support & professional services

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

National Energy System Operator Limited (NESO) intends to award an interim contract to Hewlett-Packard Limited (HPE) for the provision of support, maintenance and associated Profes

£Up to £2,165,632
Posted · yesterdayView details →
N
ocds-h6vhtk-06ed0c · award

NESO interim capability

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

The National Energy System Operation (NESO) has awarded an interim capability agreement to Palantir Technologies UK Limited to continue licensing and support for its Connections and Skip Rate activities. This is a short‑term contract to keep those services running while a longer‑term solution is developed.

£Up to £16,799,683
Posted · 1w agoView details →
N
ocds-h6vhtk-06e1d8 · award

DSI phase 2

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

The Data Sharing Infrastructure (DSI) is a socio-technical solution that makes it easier for the energy sector to share data and models in a scalable, secure, and resilient way by

£Up to £540,000
Posted · 1w agoView details →
N
ocds-h6vhtk-05e220 · award

NESO coach services tender

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

NESO is seeking a single provider of a fully managed coach service, including electrical vehicles, drivers, maintenance, cleaning, and garaging, to operate employee shuttle buses b

£Up to £1,849,722
⏱ 1 May 2026
Posted · 1w agoView details →
N
18a92ffe-c452-40da-bf3b-a1b856b83d6d · Contract

Value added reseller services - microsoft azure

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
servicesNorth East,North West,Yorkshire and The Humber,East Midlands,West Midlands,East of England,London,South East,South West,Scotland,Wales

The National Energy System Operator (NESO) has a call‑off contract with Softcat to act as a value‑added reseller for Microsoft Azure services under Lot 3 of the Technology Products & Associated Services 2 (RM6098) framework.

££14,000,000
⏱ 1 Aug 2026
Posted · 2w agoView details →
N
ocds-h6vhtk-06ed06 · award

Maintenance and support for ECP and OPDE

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

Provision of ongoing maintenance and application operation support services for NESO's European Energy Communication Platform (ECP) and Operational Planning Data Environment (OPDE)

£Up to £1,318,515
Posted · 1mo agoView details →
N
ocds-h6vhtk-06ebf4 · planning

Strategic enterprise modelling capability solution

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

NESO is inviting suppliers to take part in pre-market engagement to help us understand market capability, appetite and enterprise solution options for Strategic Capability for end-

£On request
Posted · 1mo agoView details →
N
ocds-h6vhtk-06d3af · award

Lead legal services provider for project echo

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

The National Energy System Operator ("NESO") is running a mini-competition under the NESO Legal Framework Agreement to appoint a Lead Legal Services Provider to support Project Ech

£Up to £2,200,000
Posted · 2mo agoView details →
N
ocds-h6vhtk-052235 · tender

Technical consultancy framework

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

Technical Consultancy Framework shall be a multi-lot framework. Works shall be awarded in line Framework Call-Off Procedure. The framework shall consist of 5 lots covering numerous

£Up to £60,500,000
⏱ 26 Aug 2026
Posted · 2mo agoView details →
N
ocds-h6vhtk-06a755 · award

Salesforce platform licensing and support services

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

Provision of Salesforce Platform licensing, associated SaaS platform services, and support arrangements required to support NESO's customer-facing and operational activities, inclu

£Up to £4,008,005
Posted · 3mo agoView details →
N
d9354f63-c008-4463-a1d0-a4d45e37574c · Contract

Microsoft unified support (only available from microsoft)

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
servicesNorth East,North West,Yorkshire and The Humber,East Midlands,West Midlands,East of England,London,South East,South West,Scotland,Wales

National Energy System Operator (NESO) has awarded a call-off contract under the CCS G-Cloud 14 Framework (RM1557.14) for the provision of Microsoft Unified Support services. The c

££1,081,378
⏱ 21 May 2026
Posted · 3mo agoView details →
N
ocds-h6vhtk-068c12 · award

NESO surveyor agency RFP

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

NESO will engage a single surveyor to support multiple property acquisitions throughout the next 5 years (3+1+1) , including a corporate headquarters, an operational facility, and

£Up to £2,500,000
Posted · 3mo agoView details →
N
f863fd00-15bc-4186-b212-6fefa998406f · Contract

RM6098 technology services 3 project management tool

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
SME friendly

Provision of project management software licences and associated support services via further competition under the Crown Commercial Service RM6098 Technology Services 3 framework.

££660,000
⏱ 9 Apr 2026
Posted · 4mo agoView details →
N
ocds-h6vhtk-06af93 · award

Microsoft enterprise and on-premise infrastructure licensing agreement

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

NESO needs a Microsoft licensing partner to supply and manage their enterprise software licences (Microsoft 365, servers, and infrastructure software). They're switching away from their current arrangement and need a reseller to handle the supply, administration, and ongoing management of these licences to keep their business running smoothly and securely.

£Up to £11,836,235
Posted · 4mo agoView details →
N
ocds-h6vhtk-0552ed · award

Procurement services

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

Procurement Consultancy Services

£Up to £7,700,000
⏱ 4 Nov 2025
Posted · 4mo agoView details →
N
ocds-h6vhtk-06a36a · planning

NESO engineering support services

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

The contracting authority (NESO) is considering the potential establishment of an Engineering Services framework, likely with a single supplier, to support access to specialised an

£On request
Posted · 4mo agoView details →
N
ocds-h6vhtk-06a24a · planning

NESO facilities management services framework

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

The procurement relates to the establishment of a Facilities Management Services Framework across NESO estate within the UK. The framework may include the provision of hard and/ or

£On request
Posted · 4mo agoView details →
N
ocds-h6vhtk-06a249 · planning

NESO workplace fit-out, refurbishment and associated works (east england)

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

The procurement relates to office fit-out and refurbishment works across NESO estate locations within the UK. NESO currently intends to competitively procure the works via one of t

£On request
Posted · 4mo agoView details →
N
ocds-h6vhtk-06a248 · planning

NESO workplace fit-out, refurbishment and associated works (north england)

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

The procurement relates to office fit-out and refurbishment works across NESO estate locations within the UK. NESO currently intends to competitively procure the works via one of t

£On request
Posted · 4mo agoView details →
N
ocds-h6vhtk-06a247 · planning

NESO workplace fit-out, refurbishment and associated works (wales)

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
South East

The procurement relates to office fit-out and refurbishment works across NESO estate locations within the UK. NESO currently intends to competitively procure the works via one of t

£On request
Posted · 4mo agoView details →