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 ATTandCK 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 PowerShell 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 det