We’re supporting a major organisation operating within a Critical National Infrastructure (CNI) environment to hire a Senior Cyber Security Analyst. This is a hands‑on, high‑impact role embedded within a mature Security Operations Centre, focused on protecting essential services.
The Opportunity
You’ll play a key role in real‑time threat detection and response, working across a complex enterprise environment. This position combines SOC operations, threat hunting, and continuous improvement, giving you the chance to influence detection capability and response maturity.
Monitoring & Triage
* Analyse and triage security alerts using SIEM platforms
* Correlate events and identify patterns across multiple data sources
* Assess severity, scope, and business impact
* Conduct detailed investigations across endpoint, network, identity, and log data
* Build evidence‑led timelines and document findings clearly
* Apply forensic principles (process activity, persistence, lateral movement)
* Manage incidents from detection through to escalation
* Support containment and mitigation activities where required
* Ensure high‑quality handover to incident response teams
* Develop and tune detection rules to improve accuracy
* Feed into post‑incident reviews and enhance SOC processes
* Contribute to documentation, playbooks, and operational standards
What We’re Looking For
* Strong experience within a SOC / CSOC environment
* Hands‑on expertise with SIEM tools (e.g. Microsoft Sentinel, Splunk, Elastic)
* Experience with query languages such as KQL / ES|QL / Kibana
* Solid understanding of threat detection, IOCs, and attacker TTPs
* Proven experience across the full incident lifecycle
* Clear and structured communication skills, especially under pressure
* Experience with Elastic
* Relevant certifications (e.g. GIAC, SANS or equivalent)
* Work within a highly secure, mission‑critical environment
* Be part of a team driving best practice and continuous improvement
* Gain exposure to complex, large‑scale security operations
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