Detection Engineer

Duties

• Design, develop, and maintain detection rules, alerts, and analytics across SIEM, EDR/XDR, NDR, and Cloud Security Tools.
• Implement detection logic using relevant languages (Sigma, SPL and KQL).
• Develop detections aligned with adversary behaviours and MITRE ATT&CK framework, focusing on Advanced Persistent Threats (APTs) targeting NATO alliance.
• Develop detections from available threat intelligence, participate in purple teaming events within NCSC and evaluate recommendations from Threat Hunting Team.
• Maintain and improve a structured detection engineering lifecycle established in CSOC, including: Design, Development, Testing, Deployment, Monitoring, Improvement and Review phases.
• Support CSOC efforts in improving Detection-as-Code practices and version control for detection content.
• Review and improve existing detection quality metrics established in CSOC.
• Conduct detection coverage assessments across monitored on-premise and cloud-based NATO infrastructure, in order to perform gap analysis against Adversary TTPs relevant to NATO infrastructure.
• Support CSOC threat modelling efforts in order to determine where detection capabilities should be improved.
• Define priorities for new detections based on the NATO attack surface, known risks, current trends and available intelligence.
• Collaboration with other Sections within NCSC and Defend Branch.
• Support incident handling team (CSIRT) by developing new detections based on newly released reports about vulnerabilities affecting NATO enterprise and information gathered during CSIRT`s operations.
• Collaborate with Threat Hunting Team (CTIS) to operationalise their findings into automated detections where applicable.
• Support the design of detection strategies for new technologies, platforms, and network architectures which could be introduced to CSOC, through various NATO projects.
• Review newly-ingested log data to ensure it aligns with the Splunk Common Information Model (CIM); carry out periodic audits, verify field extractions and event-type mappings, and liaise with data-source owners to resolve any inconsistencies or gaps.
• Provide security analysis and investigative support during ongoing cybersecurity incidents.
• Perform other duties as required, including ad‑hoc projects, special investigations or support activities that fall outside the listed responsibilities, to ensure the overall effectiveness and resilience of the CSOC and NCSC.