We run both a SIEM and a SOAR. What does each one do, and how do they work together?
Short answer
A SIEM ingests and correlates logs from across the estate to generate alerts — it is your detection and search layer. A SOAR sits downstream and automates the response: it runs playbooks, enriches alerts via integrations, and handles case management so analysts spend less time on repetitive steps.
SIEM and SOAR are often mentioned in the same breath because they sit next to each other in the SOC pipeline, but they solve different problems. Confusing them is a common junior mistake, so interviewers ask this to check that you understand where detection ends and response begins.
SIEM: detection and visibility
A Security Information and Event Management platform ingests logs and telemetry from many sources — firewalls, endpoints, identity providers, cloud, applications — normalizes them into a common schema, and lets you search and correlate across all of them. Its core jobs are aggregation, correlation, alerting, and retention for compliance and investigation. When a rule matches (for example, many failed logins followed by a success), the SIEM raises an alert.
SOAR: orchestration and automation
A Security Orchestration, Automation and Response platform picks up where the SIEM leaves off. It connects to your other tools through integrations and runs playbooks — codified, repeatable response steps. A playbook might automatically enrich an alert with threat-intel lookups, geolocate an IP, query the EDR for related processes, open a case, and even contain a host, all without an analyst typing commands.
How they work together
The SIEM says "something happened"; the SOAR helps you decide and act fast. Together they shrink mean time to respond by removing repetitive manual steps and ensuring every alert is handled consistently.
Why this matters
Interviewers want to hear that detection and response are distinct stages. Knowing this shows you understand the SOC workflow end to end, and that automation augments analysts rather than replacing their judgment on high-stakes decisions.
Likely follow-ups
- Give an example of a SOAR playbook you would automate first.
- What kinds of decisions should never be fully automated?
- How does SOAR help with mean time to respond (MTTR)?