Top suppliers
Top suppliers to DESNZ
Top-five suppliers hold 62% of contract value — a concentrated market.
Procurement categories
What DESNZ buys
Common Procurement Vocabulary (CPV) breakdown of contracts awarded over the reporting period.
7941000079340000713100007911000009110000731100005011000072220000753100009071000066170000795100007999000072210000981100002411000075210000722600007241000072250000Recent contracts
Latest DESNZ contracts awarded
The most recently published award notices on Find a Tender and Contracts Finder.
Evaluation of Electricity Transmission Network Infrastructure Bill Discount Scheme and Community Funds Guidance.
Verian Group UK Ltd · 2026-07-27
£640K
ICF Legal Services Contract Award Notice
TLT LLP · 2026-07-10
£800K
Contract Award Notice - Landfill Gas to Electricity, Cost Commission
WSP UK LIMITED · 2026-06-19
£60K
Amiqus Resolution Ltd - RTW Identity Checks
Amiqus Resolution Ltd · 2026-05-22
£72K
PS26123 - RAF 003/2627 - Green home loan scheme and Solar research
Verian Group UK Ltd · 2026-05-18
£118K
DESNZ- Commercial Contingent Labour Support
Investigo Limited · 2026-05-12
£71K
AWARDED CONTRACT NOTICE: SMIP ICT Testing and Migration Services
METHODS BUSINESS AND DIGITAL TECHNOLOGY LIMITED · 2026-05-11
£1.9M
AWARDED - Smart Metering Implementation Programme (SMIP) - ICT Technical Architecture and Security
AVELLA SECURITY LIMITED · 2026-05-11
£2.6M
Evaluation for HALEU Programme
RSK Environment · 2026-05-01
£1.4M
Evaluation for HALEU Programme
RSK Environment · 2026-04-20
£1.4M
DDaT25435 - Penetration Testing
Security Software Solutions · 2026-04-17
£10K
DESNZ Leading Together leadership change programe
Forward Institute, · 2026-04-02
£12K
CSP25292 - Emergency Response, Capabilities and Operations (ERCO) Training and Exercising Contract
JOLTS Consulting Limited · 2026-04-02
£1.5M
Evaluation for GIGa HALEU Programme
RSK Environment · 2026-04-01
£1.4M
Awarded Contract: Provision of Regulatory Design Services to the Smart Metering Implementation Programme
Yellow Wood Energy Consulting Ltd · 2026-03-27
£1.9M
Project SWAN Development Agreement
SWAN Heat Network Limited · 2026-03-27
£100K
CSP25449 - Executive Search Agency Recruitment GBE 2025
FWB Park Brown Limited · 2026-03-18
£150K
Support for Deep Water Wind Industry, Market and Technology Insight and Expertise
Buro Happold Limited · 2026-03-11
£165K
PS25193 - Electrification of Heat Programme Evaluation
ICF Consulting Services Ltd · 2026-03-03
£999K
Industrial Electrification Investment Decision Research - AWARDED CONTRACT
RICARDO LIMITED · 2026-03-02
£100K
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Open opportunities
Open DESNZ tenders
Tenders currently inviting bids. SMEs can respond via the official tender portal.
Hydrogen Heating Programme - Data on existing gas installations within domestic and non-domestic buildings
Early Market Engagement Event - Forest and Climate Leaders' Partnership (FCLP) Secretariat Operational Delivery Partner
Scheme Design Consultancy Call Off - Energy Efficiency Voucher Scheme
£3.0M
Early Market Engagement Event - Green Grids Initiative (GGI) Secretariat
Expression of Interest - PUMPWATCH OPEN DATA SCHEME FOR ROAD FUEL PRICES AGGREGATOR - MARKET ENGAGEMENT
Green Finance Toolkit Early Market Engagement Event
Energy Efficiency Voucher (EEV) Prior Information Notice (PIN)
Procurement of the delivery of cash entitlements and administration of the National Concessionary Fuel Scheme
£8.0M
Climate Ambition Support Alliance (CASA)
ICF Legal Service 2025
Legal Service
£800K
IEA TCP Alternate Delegates - Preliminary Market Engagement
ECO4 Fraud and Error Assurance
£594K
Climate Change Pull Facility (CIPF) - Evaluation Partner
£2.0M
Climate Innovation Pull Facility (CIPF) - Facility Manager
Hydrogen Storage Business Model - Procurement for Hydrogen Storage Rights and associated remarketing services
Market Engagement Event
Services to Provide Ongoing Analysis and News Reporting on Oil Markets 2024-2026
Decarbonising gas markets: How could the EU Gas Package impact the UK?
Market engagement event
Pipeline
Contracts expiring in the next 12 months
When these contracts end, DESNZ typically re-tenders. SMEs preparing bids 3-6 months ahead win disproportionately often.
Smart data schemes in energy
Expires: 2026-08-12
£236K
BE24137 - Provision of Building Energy Performance Specialist Services to the Smart Metering Implementation Programme
Expires: 2026-08-13
£428K
DDaT24188 - Jira, Confluence and Checklist (UK Cloud) Licenses
Expires: 2026-08-18
£36K
con_9278 - ARMS for HNTAS Data Pilots
Expires: 2026-08-25
£22K
con_9230 - ARMS for HNTAS Data Pilots
Expires: 2026-08-25
£30K
con_9229 - ARMS for HNTAS Data Pilots
Expires: 2026-08-25
£29K
con_9230 - ARMS for HNTAS Data Pilots
Expires: 2026-08-25
£29K
con_9228 - ARMS for HNTAS Data Pilots
Expires: 2026-08-25
£29K
DESNZ- Commercial Contingent Labour Support
Expires: 2026-08-28
£71K
PS23421 Greenhouse Gas Removal - Technical Consultancy
Expires: 2026-08-28
£4.0M
PS26123 - RAF 003/2627 - Green home loan scheme and Solar research
Expires: 2026-08-31
£118K
DESNZ Leading Together leadership change programe
Expires: 2026-09-01
£12K
Warm Home Discount - Contact Centre - Contract Award Notice
Expires: 2026-10-13
£5.5M
PS24233 - CCA Future Schemes
Expires: 2026-10-30
£400K
Contract Award Notice - Landfill Gas to Electricity, Cost Commission
Expires: 2026-11-06
£60K
DDaT24382 - Managed Support Services - Solution Development
Expires: 2026-11-07
£224K
con_8954 - HNTAS Interim Technical Support
Expires: 2026-11-16
£781K
BE24192 - The Contribution of Demand Side Response (DSR) to Decarbonisation Targets
Expires: 2026-12-11
£393K
BE24194 - Smart Metering Programme Evaluation (IPE)
Expires: 2026-12-22
£879K
Sizewell C Legal Services
Expires: 2027-01-05
£7.5M
Sizewell C Legal Services
Expires: 2027-01-05
£7.5M
Legal services for the DESNZ GBN Sponsorship and Policy team
Expires: 2027-01-19
£15.0M
Energy & Net Zero Professional Services Framework
Expires: 2027-01-31
£250.0M
RM6313: Demand Management & Renewables DPS - Technical Assistance Facility 2
Expires: 2027-02-01
£26.6M
Devops Resource for Radiological Response and Emergency Management System (RREMS)
Expires: 2027-02-02
£289K
PS23414 - Greenhouse Gas Removal - Legal Services
Expires: 2027-02-02
£6.0M
CSP25449 - Executive Search Agency Recruitment GBE 2025
Expires: 2027-02-24
£150K
PS25193 - Electrification of Heat Programme Evaluation
Expires: 2027-03-31
£999K
Project SWAN Development Agreement
Expires: 2027-03-31
£100K
PS25220 - RAF014/2526 - Evaluation of the Retrofit Devolution Program
Expires: 2027-03-31
£280K
CSP25292 - Emergency Response, Capabilities and Operations (ERCO) Training and Exercising Contract
Expires: 2027-03-31
£1.5M
Contract Award Notice Home Energy Model (HEM) Lot 2
Expires: 2027-04-13
£807K
Contract Award Notice - Home Energy Model - Lot 3
Expires: 2027-04-13
£1.2M
UK MEMBERSHIP OF THE GLOBAL CCS INSTITUTE
Expires: 2027-04-21
£346K
Automox Licence for the Radiological Response and Emergency management system (RREMS)
Expires: 2027-04-24
£1K
HNES Evaluation
Expires: 2027-04-30
£455K
Fuel Finder Services
Expires: 2027-05-02
£1.1M
Contract Award Notice - Home Energy Model (HEM) Lot 4
Expires: 2027-05-05
£1.6M
Contract Award Notice Home Energy Model (HEM) Lot 6
Expires: 2027-05-05
£270K
Contract Award - Home Energy Model (HEM) Lot 1
Expires: 2027-05-07
£1.9M
Financial experts on due diligence for hydrogen projects assessment and negotiation
Expires: 2027-05-12
£8.0M
Contract Award - Home Energy Model (HEM) - Lot 5
Expires: 2027-05-31
£1.4M
GSS25025 - Recruitment Campaign
Expires: 2027-06-04
£70K
External Advisor on Valuations
Expires: 2027-06-11
£450K
PS24030 - Energy and Net Zero Behavioural Science Framework RAF067.2324 - RFP
Expires: 2027-06-21
£1.8M
Provision of Professional Services for GBE Investments
Expires: 2027-06-24
£1.5M
Development of a Model of the GB Electricity Distribution System
Expires: 2027-06-24
£302K
Contract Award Notice for the Administration of the Biomass Supplier List
Expires: 2027-06-30
Greenhouse Gas Removals (GGR) Standards and Methodologies
Expires: 2027-06-30
£4.4M
Financial experts on due diligence for hydrogen projects assessment and negotiation (Secondary Supplier)
Expires: 2027-07-22
£8.0M
Market analysis
Bidding into DESNZ — what to expect
Supplier concentration and timing patterns that shape SME bid strategy.
62%
Top-5 supplier share
28d
Avg response window
27d
Median response window
13mo
Avg contract duration
Frequently asked
Common questions about selling to DESNZ
How much does DESNZ spend on procurement?
DESNZ awarded 189 contracts totalling £483.1M between 2023-08-01 and 2026-08-01, working with 153 unique suppliers. Average contract value is £2.6M.
Who are DESNZ's top suppliers?
The largest suppliers to DESNZ by total award value are PricewaterhouseCoopers LLP, Manning Gottlieb OMD, a trading division of OMD Group Ltd, Homefire Group Limited. The top five suppliers together hold 62% of contract value.
What does DESNZ buy from suppliers?
DESNZ's procurement is concentrated in business and management consultancy services, advertising and marketing services, consultative engineering and construction services, alongside specialist categories. See the full CPV breakdown below.
How can my business bid for DESNZ contracts?
DESNZ publishes open tenders on Find a Tender and Contracts Finder. ENKII matches your business against live tenders, identifies certifications you'll need, and surfaces frameworks worth applying to. Free Readiness Score in 3 minutes.
What's the typical response window for DESNZ tenders?
DESNZ typically gives suppliers a median of 27 days to respond (average 28 days). Standard contract duration is around 13 months.
Continue reading
Related ENKII resources
GUIDE
PQQ & Selection Questionnaire — Procurement Act 2023
How UK central-government departments evaluate suppliers at the pre-qualification stage.
GUIDE
Cyber Essentials — for government contracts
Most central-government contracts handling personal data require this certification.
SECTOR
UK Government IT Services
G-Cloud, DOS, Crown Commercial frameworks. Software + consultancy is DESNZ's largest spend area.
INDEX
All UK public-sector buyers
Browse procurement profiles for every UK government department and major buyer.
Sources & methodology
How this profile is compiled
Analysed by ENKII · Updated 2026-08-01
This profile aggregates public-record procurement data published by the UK Government under the Open Government Licence v3.0. ENKII fetches, deduplicates, and aggregates source records; we don't edit the underlying facts.
Source portals
- · Find a Tender (find-tender.service.gov.uk)
- · Contracts Finder
- · Spend Network
Source records remain subject to Open Government Licence v3.0 attribution. ENKII doesn't warrant accuracy beyond the source portals' own publication.