Introduction

A Legal 500 firm’s journey from EDR to true XDR security

A leading London-based Legal 500 law firm partnered with Nomios to strengthen its cybersecurity posture and protect highly sensitive client data. Facing limited visibility and delayed response capabilities from a traditional managed EDR service, the firm sought a more advanced, integrated approach. By implementing 24/7 Managed XDR with automation and deep cloud and on-premise integrations, Nomios helped the organisation move from baseline protection to a proactive, intelligence-driven security strategy built for the demands of the legal sector.

The challenge

The law firm manages vast volumes of sensitive client data in a highly regulated sector. To stay ahead of increasingly sophisticated cyber threats, the firm had a desire to modernise its approach to security monitoring.

The existing managed EDR solution only delivered a baseline level of protection. It lacked integrations outside of the endpoint, advanced detection capabilities and automated response actions. The result was gaps in visibility and response actions requiring human intervention. Limited insights, delayed alerts, and poor communication from the incumbent provider made compliance more difficult and operations less efficient. To close these gaps, the firm needed a trusted partner with true XDR capabilities and hands-on expertise.]

The decision

After evaluating several providers, the law firm selected Nomios for their industry expertise and partnership-led approach. Nomios offered more than just tools, they provided 24x7 Managed XDR services, strategic guidance, and continuous optimisation. With deep knowledge of the legal sector, proven engineering excellence, and advanced automation via Palo Alto Cortex XSOAR, Nomios stood out as a long-term security ally.

Nomios stood out because they didn't just offer a product; they provided a true security partnership, ensuring our systems are continuously improving and evolving to meet new threats. - Head of Technology & Security, Legal 500 law firm

The solution

Nomios implemented a multi-layered security strategy, centered around SentinelOne XDR and Palo Alto Cortex XSOAR. The service delivers real-time monitoring, automated response and deep integrations across on-premises and cloud environments. Custom detections aligned to the MITRE ATT&CK framework enhances visibility, whilst automation and alert enrichment streamline operations. Regular testing and tuning ensure the company’s defences remain robust against both simulated and real-world threats.

The impact

Key security capabilities delivered

With Nomios’ Managed XDR service in place, the firm significantly strengthened its ability to detect, investigate, and respond to threats across its entire environment. The new approach delivered greater visibility, faster containment, and continuous optimisation.

24/7 SOC monitoring: Always-on monitoring through a dedicated 24/7 SOC
Automated threat containment: Automated response actions to contain threats at speed
Unified environment visibility: Integrated insights across cloud and on-premise environments
Continuous optimisation & tuning: Regular tuning and strategy updates to stay ahead of emerging threats
MITRE-aligned detections: Consistent, high-quality detections powered by aligned MITRE-based rules

The partnership

By working with Nomios, the law firm has raised it's security maturity and improved operational resilience, moving from reaction protection to a proactive, intelligence-driven security posture. The law firm views Nomios as a long-term partner in building a resilient, adaptable security foundation. Ongoing optimisations include expanding automation, developing custom SOC rules to address emerging threats, and aligning security strategy to business objectives. Key outcomes include: