A multinational defence organisation is strengthening the detection engineering side of its security operations centre. This is not alert triage: you build the content the analysts depend on, measure whether it works, and close the gaps you find. What you would be doing Designing, building and maintaining detection rules, alerts and analytics across SIEM, EDR and XDR, network detection and cloud security tooling. Writing detection logic in the languages that suit it — Sigma, SPL, KQL. Building detections around adversary behaviour and mapping them to the MITRE ATT&CK framework, with advanced persistent threats in mind. Turning threat intelligence and purple team findings into working automated detections. Running a proper detection lifecycle — design, development, testing, deployment, monitoring, improvement, review — and improving the quality metrics behind it. Assessing detection coverage across on-premise and cloud estates, and doing the gap analysis that says where to invest next. Reviewing newly ingested log sources against the common information model, auditing field extractions and event mappings, and chasing data owners when something does not line up. Supporting incident handlers and threat hunters when an investigation is live. What you would bring Real detection engineering experience, and the version control and code review habits that make it repeatable. Hands-on work with a major SIEM and with endpoint and network detection tooling. Fluency in at least one detection language, and enough scripting to automate the rest. Familiarity with adversary tradecraft and with the ATT&CK framework as a working tool rather than a poster. Professional English, and the ability to explain a detection decision to people who did not write it. The assignment is on-site near Mons.
Threat Detection Specialist — MITRE ATT&CK Coverage for NATO with security clearance • Wallonia, Belgium
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