What is detection engineering?

Detection engineering emerged as a distinct role around 2018 as SOC teams realized that detection content needed dedicated ownership. Detection engineers write SIEM correlation rules, EDR custom detections, threat hunting queries, and behavior analytics. The discipline borrows from software engineering: detections are versioned, tested, deployed in stages, and measured for precision and recall. Quality detection engineering produces the alerts the SOC actually wants.

Command Zero captures investigation insights as encoded questions, which detection engineers can use as the basis for new detection rules. A pattern surfaced in repeated Tier-3 investigations becomes a question available to all analysts and a candidate for a new SIEM detection. The Casebook is a corpus of attack patterns and investigation paths that detection engineers can mine for ideas. Command Zero does not produce detection content directly; it makes detection engineering more efficient by surfacing what investigation reveals.