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About the project

A leading UK utility provider, responsible for critical national infrastructure, faced increasing cyber threats and needed to secure both IT and OT systems while ensuring uninterrupted services for millions of customers.


By collaborating with Telefónica Tech, the organisation adopted a Sentinel-first strategy with SIEM Management, Secure Microsoft, Digital Risk Protection and Managed Detection & Response. The result: stronger cyber resilience, real-time visibility, and a future-ready security platform to protect essential services nationwide.

Case study highlights

Smooth, secure migration to Sentinel

The transition to a co-managed Microsoft Sentinel model progressed seamlessly, strengthening the organisation’s security posture in real time without disrupting operations.

Faster threat detection and response

Automation-driven security responses accelerate threat containment, reduce manual intervention, and enable rapid, proactive incident management.

Proactive risk management and insights

Advanced threat intelligence and continuous improvement processes enable proactive threat hunting and actionable insights to mitigate evolving cyber risks.

Cyber resilience across IT and OT

Enhanced security across corporate IT and operational technology systems reduces exposure to advanced threats while ensuring critical national services remain uninterrupted.

Strategic security partnership for the future

Telefónica Tech is embedded in the utility’s security framework, providing ongoing support, governance, and scalability for future Cyber Security needs.

Discover the technologies that made this project possible

What they say about us

    Telefónica Tech’s security-first approach and expertise in SIEM Management have strengthened our cyber resilience, providing a future-proofed security operations model.

    CIO, One of the largest Water Utilities in the UK

Success Stories