Brief your market

Who could bid the next time Defence Infrastructure Organisation tenders for engineering & architecture — from published contract awards, not directories. A tender that reaches more proven suppliers gets more bids; more bids is the evidence of value for money.

Construction (18)Engineering & Architecture (15)IT Services (2)Construction Materials & Structures (2)Software & IT Systems (1)Leather, Textile & Plastic Materials (1)Research & Development (1)

Ring 1

Proven with you

Suppliers already holding a published Defence Infrastructure Organisation award in this category.

MACE LIMITED3 awards · latest Aug 2022
Project Management and Supervisor activities in support of the Vehicle Storage and Support Programme Tranche 1
ARCADIS LLP2 awards · latest Sept 2022
SLA Wave 1 Stage 4-6 Imjin - Technical Support Services
Amentum Clean Energy Ltd1 award · latest May 2026
TECHNICAL SUPPORT PROVIDER (TSP): MUNITIONS (DM) GOSPORT - WATERFRONT MUNITIONS HANDLING FACILITY (WMHF) - BEDENHAM PIER
AECOM ltd1 award · latest Mar 2024
PRIDE2 Construction Management RIBA4-6
Miyamoto International Nepal Pvt Ltd1 award · latest Jun 2023
Structural Consultancy MTC
WESSEX ARCHAEOLOGY LIMITED1 award · latest Aug 2022
Post Site Analysis, Recording and Publishing of finds relating to the ABP on SPTA
Atkins Consulting Engineers Limited1 award · latest Mar 2021
Provision of Environmental Impact Assessment, Nyati, Kenya
WYG MANAGEMENT SERVICES LIMITED1 award · latest May 2020
DEO Assessment Studies Package 2, Lot 2
Wood Environment and Infrastructure Solutions Limited1 award · latest Apr 2019
GB-Sutton Coldfield: FATS Task for Groundwater Monitoring
RSK Environment Limited1 award · latest Feb 2019
GB-Sutton Coldfield: Kingsdown Rifle Range

Showing 10 of 12.

Ring 2

Proven with buyers like you

Suppliers who have won this category with other Defence buyers — ranked by how many different buyers they've won with. This is the shortlist that widens your field.

BAE Systems (Operations) Limited12 awards · 5 buyers · latest Apr 2021
JSENS/00154 - In-Service Support For The Ground Based Air Defence Battlefield Information System Application (GBAD BISA)
WYG Management Services Limited16 awards · 4 buyers · latest Jun 2020
Provision of Delivery Support
Atkins Limited9 awards · 4 buyers · latest Dec 2022
CIO Infrastructure Technical Resource - CAN
RSK Environment Limited4 awards · 4 buyers · latest Oct 2020
GB-Sutton Coldfield: Phase 2 LQA Leuchars
Qinetiq Ltd7 awards · 3 buyers · latest Aug 2022
Naval Strike Network C2 FY 22-23 Progress Operational Experimentation (704332451)
SA Group Ltd6 awards · 3 buyers · latest Oct 2024
HAS Partner of Choice Support
LA International Computer Consultants Limited5 awards · 3 buyers · latest Jul 2025
M365 Azure, Global Administration, Teams and Power Platform Delivery
C3IA Solutions Limited5 awards · 3 buyers · latest Jul 2025
Land System Reference Centre (LSRC) Technical Support
Ebeni Limited5 awards · 3 buyers · latest Oct 2024
SSvRIS SAC
Ridge and Partners LLP5 awards · 3 buyers · latest Oct 2025
Contract Award Notice for IPMO 2156; RIBA 1-2 services

Showing 10 of 570.

Ring 3

Proven in the field

Suppliers winning this category anywhere in UK public procurement (excluding those already listed above).

WSP Uk Limited422 awards · 136 buyers · latest Jun 2026
Homes England - Asbestos Demolition Surveys at Canning Place, Liverpool
Aecom limited240 awards · 110 buyers · latest Jul 2026
KGH - Project Manager & Cost Advisor Services for Rockingham Wing Ext
Aecom381 awards · 88 buyers · latest Oct 2025
PLACE975ET Green Light Fund Journey Time Module - call-off from ESPO 664_21 Lot 5
Pick Everard138 awards · 72 buyers · latest Jul 2026
Sumner Buildings MEP Engineer
WSP Uk Ltd221 awards · 69 buyers · latest Jul 2026
Wallingford Strategic Property Review
Ove Arup & Partners Limited123 awards · 64 buyers · latest Jul 2026
Barrow Multi-Modal Transport Study
Arcadis Consulting (UK) Limited 142 awards · 62 buyers · latest Jul 2026
Demolition of St Thomas' House - Professional Services
Mott Macdonald Limited148 awards · 60 buyers · latest Jul 2026
WALSALL TO STOURBRIDGE MASS RAPID TRANSIT STUDY
Mott Macdonald160 awards · 54 buyers · latest Mar 2026
Contract for Allington Sluice Drive System Replacement ECC Supervisor & ECoW Design Support
Baily Garner LLP 98 awards · 51 buyers · latest Jul 2026
Milton Keynes City Council - Project Manager and Quantity Surveyor Services

Showing 10 of 13,746.

The full list — for members

All 570 Defence suppliers in ring 2 (capped at 400, widest-proven first), copyable as a spreadsheet — so every proven supplier can hear about your next tender, not just the usual three.

Sources: published UK contract award notices in the rfp.quest corpus. “Proven” means a citable award — nothing here is inferred or scraped from directories. Award values are not summed because framework ceilings would inflate them.