Senior Security Engineer
  • England,London,City of London
  • Full Time, Permanent
  • Salary negotiable
Job Description:
Full job descriptionRole OverviewWe’re looking for a Security Engineer to support the operation, optimisation, and continuous improvement of enterprise security platforms across a complex client environment. You’ll work closely with SOC analysts, engineers, and client teams to ensure tooling is effective, resilient, and aligned to evolving threats.
Key Responsibilities*Maintain and optimise security platforms including SIEM (Microsoft Sentinel), Defender stack, vulnerability management, DLP, and cloud security tools
*Ensure platforms are integrated, performing effectively, and aligned to client requirements
*Support incident response by resolving platform issues, enabling telemetry, and making technical changes where required
*Deploy and tune detection rules, improving alert quality and reducing false positives
*Support automation initiatives (e.g. SOAR, LogicApps) to drive operational efficiency
*Collaborate with SOC providers and internal teams on platform performance, log ingestion, and ongoing improvements
*Maintain clear documentation and operate within change control and compliance frameworks
Skills & Experience*Strong hands-on experience with Microsoft Sentinel, Defender, and security tooling in a SOC or managed services environment
*Experience across SIEM, EDR/XDR, vulnerability scanning, and cloud security
*Knowledge of detection engineering, log pipelines, and threat frameworks (e.g. MITRE ATT&CK)
*Scripting/automation skills (PowerShell, Python, or similar)
*Solid understanding of networking, Azure, and security architecture
*Experience working in regulated environments is advantageous
Personal Attributes*Analytical problem solver with strong technical depth
*Collaborative and able to work across technical and non-technical teams
*Proactive, detail-oriented, and accountable for platform health
*Strong communicator with a client-focused mindset
Additional Requirements*Eligible for UK security clearance (SC/NPPV)
*Relevant certifications (e.g. AZ-500, SC-200, Security+) desirable
Job number 3862554

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Claranet Limited
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