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Managed Detection and Response Tender

Southern Water Services Ltd.

This public procurement record has 3 releases in its history.

TenderUpdate

12 Aug 2026 at 09:41

UK4 - Tender Notice
Tender

11 Aug 2026 at 11:30

UK4 - Tender Notice
Planning

15 Jan 2026 at 16:15

UK2 - Preliminary Market Engagement Notice
Summary of the contracting process

Southern Water Services Limited is procuring a single-supplier managed detection and response (MDR) service for its corporate IT and operational technology (OT) environments. The service must provide 24/7/365 monitoring, threat detection, triage, investigation, incident response for IT and OT, case management, reporting and assurance evidence. It must support regulatory and assurance obligations including the Cyber Assessment Framework, Network and Information Systems requirements and Drinking Water Inspectorate requirements. The provider is expected to integrate telemetry from Southern Water’s existing Nozomi Networks, Cisco Cyber Vision and CrowdStrike tools, proposing additional tooling where material gaps are identified. The work is for Southern Water’s clean-water sites and assets, with potential expansion to wastewater OT sites and assets.

The process has reached tender: Southern Water invited offers through an open competitive flexible procedure under the Procurement Act 2023. It is a single lot for one supplier. Responses combine a pre-qualification questionnaire with technical and commercial information; Southern Water may down-select bidders before full evaluation. Enquiries were due by 21 August 2026 at 16:00, and tenders by 21 September 2026 at 16:00, submitted electronically. The contract is planned to run from 4 January 2027 to 3 January 2030, with options for one-year extensions in each of the following two years, potentially ending on 3 January 2032. The estimated gross value is £10m. Evaluation is 70% technical quality and 30% commercial cost, with award expected by 27 November 2026.

This opportunity suits established cyber-security and managed security service providers able to operate a resilient 24/7/365 MDR capability across both enterprise IT and industrial OT environments. Relevant suppliers will need practical expertise in continuous monitoring, threat detection, investigation, incident response, case management, reporting and production of assurance evidence. Experience integrating telemetry from Nozomi Networks, Cisco Cyber Vision, CrowdStrike and comparable security platforms will be important, as will the ability to identify and address gaps without unnecessarily replacing the existing tooling estate. Strong knowledge of the Cyber Assessment Framework, Network and Information Systems requirements and Drinking Water Inspectorate expectations is relevant. Suppliers should also have the operational capacity to support clean-water assets and potentially wastewater OT sites.

How relevant is this notice?

Notice Information

Notice Title

Managed Detection and Response Tender

Notice Description

The objective of this tender is to select a single supplier to provide a combined Managed Detection and Response (MDR) service covering SWS' Corporate/IT and Operational Technology (OT) environments. SWS is seeking a 24/7/365 MDR service providing continuous monitoring, threat detection, triage, investigation, IT and OT incident response, case management, reporting and assurance evidence. The MDR Service must support SWS in meeting its regulatory and assurance obligations, including CAF, NIS and DWI requirements SWS operates an existing security tooling estate (e.g. Nozomi Networks, Cisco Cyber Vision and CrowdStrike). The MDR Service Provider will be expected to consume and integrate telemetry from these existing SWS tooling sources rather than replace them by default. Where a Tenderer identifies material gaps in the existing tooling estate, they should propose solutions to address those gaps as part of their proposed design and tender response. Estimated contract value for a 3-year contract with options to extend by 1-year and a further 1-year is PS8.5m

Lot Information

Lot 1

Options: Southern Water reserves the right to require the supplier to deliver some or all of the services in relation to Southern Water Wastewater operational technology ("OT") sites and assets, in addition to Clean Water sites and assets. Southern Water may exercise this right at any time during the contract term. Any services required for Wastewater OT sites and assets will be of the same type as some or all of the services provided by the supplier for Clean Water sites. Charges for any services required for Wastewater OT sites and assets will be determined using the cost model, tendered rates and charging basis as set out in the Commercial Response Schedule (PK-008).

Renewal: Southern Water may extend the term of the contract for an additional one year from the third anniversary of the contract start date, meaning the contract would expire four years after the contract start date. In addition, Southern Water may extend the term of the contract for an additional one year from the fourth anniversary of the contract start date, meaning the contract would expire five years after the contract start date.

Planning Information

Any interested parties should register their interest via Jaggaer and respond to the questions within the RFI. https://southernwater.bravosolution.co.uk

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-0606ff
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/076524-2026
Current Stage
Tender
All Stages
Planning, Tender

Procurement Classification

Notice Type
UK4 - Tender Notice
Procurement Type
Standard
Procurement Category
Services
Procurement Method
Open
Procurement Method Details
Competitive flexible procedure
Tender Suitability
Not specified
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

72 - IT services: consulting, software development, Internet and support

CPV Codes

72000000 - IT services: consulting, software development, Internet and support

72600000 - Computer support and consultancy services

Notice Value(s)

Tender Value
£10,000,000 £10M-£100M
Lots Value
£10,000,000 £10M-£100M
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
12 Aug 20261 months ago
Submission Deadline
21 Sep 20265 days to go
Future Notice Date
Not specified
Award Date
Not specified
Contract Period
4 Jan 2027 - 3 Jan 2030 3-4 years
Recurrence
Not specified

Notice Status

Tender Status
Active
Lots Status
Active
Awards Status
Not Specified
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
Southern Water Services Ltd.
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
WORTHING
Postcode
BN13 3NX
Postcode Area
Brighton
Country
England
Major Region (ITL 1)
TLJ South East (England)
Basic Region (ITL 2)
TLJ2 Surrey, East and West Sussex
Small Region (ITL 3)
TLJ27 West Sussex (South West)
Delivery Location
Not specified
Local Authority
Worthing
Electoral Ward
Northbrook
Westminster Constituency
Worthing West

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

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