What a Security Operations Centre Does

What is a SOC?

A Security Operations Centre (SOC) is a team — and the tools they use — dedicated to monitoring an organisation's IT environment for threats, investigating alerts, and responding to incidents. The defining characteristic is continuous monitoring: a SOC watches your environment around the clock, not just during business hours.

For most businesses, a SOC is the difference between detecting a breach in minutes and discovering it weeks later when the damage is done. The average dwell time for an attacker in an unmonitored environment — the time between initial compromise and detection — is measured in weeks, not hours.

What a SOC does day to day

The core SOC workflow is monitor, detect, investigate, respond:

• Monitor — collect logs and telemetry from endpoints, network devices, cloud services, and identity systems
• Detect — correlate events using SIEM rules and AI to identify suspicious patterns
• Investigate — triage alerts, determine whether they're genuine threats or false positives
• Respond — contain threats, isolate affected systems, and initiate recovery
• Report — document incidents and provide recommendations to prevent recurrence

How SIEM and EDR fit in

A SIEM (Security Information and Event Management) platform aggregates logs from across your environment and applies detection rules to identify threats. It's the SOC's primary visibility tool — without it, analysts are working blind.

EDR (Endpoint Detection and Response) sits on individual devices and provides deep visibility into what's happening at the endpoint level — process execution, file changes, network connections. Microsoft Defender for Business is an EDR included in Microsoft 365 Business Premium.

Together, SIEM and EDR give the SOC the data it needs to detect and respond to threats across your entire environment, from a phishing email that lands in a mailbox to lateral movement across your network.

What happens when a threat is detected

When the SOC detects a genuine threat, the response depends on the severity and the agreed scope of service. For a confirmed ransomware infection, that typically means isolating the affected device immediately, preserving forensic evidence, notifying the client, and initiating the recovery process.

For lower-severity alerts — a user signing in from an unusual location, for example — the SOC may investigate, determine it's legitimate travel, and close the alert without escalation. The value is in the triage: separating the genuine threats from the noise so your team isn't chasing false positives.

Managed SOC vs building your own

Building an in-house SOC requires significant investment in people, tools, and processes. A 24/7 SOC needs at minimum three to four analysts to cover shifts, plus a SIEM platform, EDR tooling, and ongoing training.

A managed SOC provides the same capability as a service, typically at a fraction of the cost. For Canberra businesses that aren't large enough to justify in-house security staff, a managed SOC is the practical path to 24/7 threat detection and response — without the recruitment, training, and retention challenges of building a security team from scratch.