---
title: "GSG-Cyber Penetration Testing (GCASE)"
ocid: "ocds-b5fd17-d2a93f02-6669-486e-b9f3-3963fddcecbb"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-d2a93f02-6669-486e-b9f3-3963fddcecbb"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-d2a93f02-6669-486e-b9f3-3963fddcecbb.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-d2a93f02-6669-486e-b9f3-3963fddcecbb.json"
source: "Contracts Finder"
current_stage: "Award"
buyer: "CABINET OFFICE"
published: "2025-09-17"
---

# GSG-Cyber Penetration Testing (GCASE)

Buyer: CABINET OFFICE  
Current stage: Award  
OCID: ocds-b5fd17-d2a93f02-6669-486e-b9f3-3963fddcecbb

[View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-b5fd17-d2a93f02-6669-486e-b9f3-3963fddcecbb)  
[Download OCDS JSON](https://d3tenders.com/contract/ocds-b5fd17-d2a93f02-6669-486e-b9f3-3963fddcecbb.json)

## Summary

The procurement process involves the "GSG-Cyber Penetration Testing (GCASE)" tender managed by the Cabinet Office, headquartered in London, through a selective procurement method as a call-off from a framework agreement. This service-focused tender falls under the information systems and servers category and delivers across the United Kingdom. The contracting process is in the award update stage as of 17 September 2025, with key activities previously concluding on 31 March 2025. The successful supplier is Cyberis, an SME based in Tewkesbury, Gloucestershire. The contract, valued at £746,509.84, commenced on 6 October 2023 and is scheduled to complete by 31 March 2026.

This tender presents significant opportunities for businesses specialising in cyber security services, particularly those that can deliver comprehensive penetration testing aligned with governmental assurance programmes. SMEs have a favourable position to compete given the tender's suitability requirements. Businesses with expertise in information systems and server security will find this contract advantageous for growth, offering a stable three-year engagement with a reputable buyer, the Cabinet Office. Engaging in this contract not only aids business expansion but also enhances credibility and experience in delivering high-stakes public sector services.

## Notice

GBEST & GCASE are two cyber penetration tests offered by GSRT. They form part of the Government's overall assurance programme.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/ca26e576-0a8e-4d00-ac74-509da3122dca |
| Notice type | Award Notice |
| Procurement type | Framework |
| Procurement category | Services |
| Procurement method | Selective |
| Procurement method details | Call-off from a framework agreement |
| Tender suitability | SME |
| Awardee scale | SME |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 17 Sep 2025 |
| Submission deadline | 29 Sep 2023 |
| Future notice date | Not specified |
| Award date | 1 Oct 2023 |
| Contract period | 5 Oct 2023 - 31 Mar 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £746,509 |
| Lots value | Not specified |
| Awards value | £746,509 |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Not specified |
| Awards status | Active |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | CABINET OFFICE |
| Locality | LONDON |
| Post town | South West London |
| Postcode | SW1A 2AS |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | CYBERIS |

## CPV Codes

### Divisions

- 48 - Software package and information systems

### Codes

- 48800000 - Information systems and servers

## Release History

- 17 Sep 2025 at 14:52 - AwardUpdate - Award Notice - https://www.contractsfinder.service.gov.uk/Notice/ca26e576-0a8e-4d00-ac74-509da3122dca

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/ca26e576-0a8e-4d00-ac74-509da3122dca
  17th September 2025 - Awarded contract notice on Contracts Finder
- https://www.contractsfinder.service.gov.uk/Notice/Attachment/a707c1e4-ab8f-4b36-bff9-02274f263cdf

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-b5fd17-d2a93f02-6669-486e-b9f3-3963fddcecbb. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-d2a93f02-6669-486e-b9f3-3963fddcecbb.json.