IT Engineer - Microsoft Defender Security Operations3 months London - hybridInside IR35 - Umbrella only Role OverviewWe are seeking an accomplished IT Engineer with specialist expertise in the Microsoft Defender security ecosystem. The successful candidate will strengthen cyber defence across endpoints, identities, cloud services, and hybrid infrastructure.Key ResponsibilitiesSecurity operations and threat defenceManage and optimise Microsoft Defender across Endpoint, Identity, Cloud Apps, Office 365, and Cloud Security Posture Management.Monitor alerts and conduct threat investigations.Support incident response with containment and remediation.Conduct proactive threat hunting.Platform administration and governanceConfigure policy baselines and protection profiles.Maintain governance and compliance alignment.Lead version management and capability tuning.Maintain documentation for configurations and processes.Stakeholder engagement and improvementCollaborate with Infrastructure, Cloud, and Cyber Security teams.Provide security insights to projects.Produce reporting for stakeholders.Identify automation and workflow enhancements.Essential SkillsStrong experience with Microsoft Defender platforms.Incident investigation skills across endpoint, identity, and cloud.Understanding of Microsoft 365, Azure, and Zero Trust.Skilled in ASR rules, AV baselines, and KQL analytics.Desirable SkillsExperience with Microsoft Sentinel.Understanding of MITRE ATT and CK.Exposure to red team activi