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Senior Microsoft Security Specialist

Job in City, Vale of Glamorgan, Wales, UK
Listing for: Synapri
Full Time position
Listed on 2026-01-27
Job specializations:
  • IT/Tech
    Cybersecurity, Security Manager, Cloud Computing, Systems Engineer
Salary/Wage Range or Industry Benchmark: 70000 - 90000 GBP Yearly GBP 70000.00 90000.00 YEAR
Job Description & How to Apply Below
Location: City

Synapri are supporting a globally recognised leader in technology services and digital transformation with hiring a Senior Security SME to take ownership of advanced security engineering, escalated incident response, and threat hunting across a Microsoft-centric SIEM and XDR environment.

This is a hands-on L3 role focused on Microsoft Sentinel and the Microsoft Defender XDR suite, acting as a technical authority within the SOC and supporting the ongoing expansion of security tooling and controls.

Responsibilities:

  • Engineering and optimising Microsoft Sentinel, including log onboarding, connectors, parsers, and data normalisation
  • Monitoring and optimising Sentinel and Defender licensing and ingestion costs
  • Designing automated response and SOAR workflows using Sentinel playbooks
  • Leading complex incident investigations and advanced threat response
  • Proactive threat hunting using KQL and developing custom detections aligned to MITRE ATT&CK
  • Producing clear incident reports, dashboards, and technical documentation

Experience required:

  • Strong hands-on experience in cybersecurity operations
  • Deep expertise in Microsoft Sentinel and Microsoft Defender XDR
  • Advanced KQL skills and SIEM data integration experience
  • Knowledge of Azure and Microsoft 365 security services
  • Scripting experience with Power Shell and/or Python

This is an excellent opportunity for a senior security professional to make real impact in a modern, evolving Microsoft security environments.

Please apply for more details!

Position Requirements
10+ Years work experience
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