Cyber Security Engineer (Threat detection engineer) Rate- £500/day outside ir35 contract Location: Hybrid (mostly remote, should be fine to travel to Birmingham when required) Duration- 6 months with possible extensions Our client is a large MSSP, looking for a skilled Cyber Security Engineer (Threat detection) with strong experience in Microsoft Sentinel, KQL, and Microsoft Defender to support detection engineering, threat monitoring, and security optimization initiatives. Responsibilities Design and develop high-fidelity threat detection use cases in Microsoft Sentinel Write and optimize detection logic using Kusto Query Language (KQL) aligned to real-world attack techniques Create new detection rules based on threat intelligence and attack methodologies (MITRE ATTandamp;CK framework preferred) Support and execute the rollout of Microsoft Defender solutions, including: Managed Defender deployment Configuration of Attack Surface Reduction (ASR) rules Lead or contribute to the migration of detection rules from Sentinel to Defender, ensuring compatibility and effectiveness Required Skills andamp; Experience Hands-on experience with Microsoft Sentinel (SIEM) and Microsoft Defender (XDR) Strong proficiency in Kusto Query Language (KQL) Background working in a Security Operations Center (SOC) or similar environment Experience in threat detection, incident analysis, and rule tuning Solid understanding of attack techniques, threat vectors, and detection strategies Preferred Ski