Security Operations Centre (SOC): Build, Buy or Hybrid?

A Security Operations Centre (SOC) is a centralised function — combining people, processes, and technology — responsible for continuously monitoring an organisation's IT environment to detect, analyse, and respond to cybersecurity incidents. The SOC ingests data from SIEM platforms, EDR solutions, firewalls, identity systems, cloud workloads, and threat intelligence feeds, using this consolidated view to identify threats that automated tools alone might miss. SOC analysts triage alerts, investigate suspicious activity, escalate confirmed incidents, and execute or coordinate response actions such as isolating compromised endpoints, blocking malicious IPs, or resetting compromised credentials.

The SOC also plays a proactive role through threat hunting — the practice of searching for indicators of compromise that have not triggered any automated alerts. Mature SOCs maintain runbooks for common incident types, conduct regular tabletop exercises, produce threat intelligence reports tailored to the organisation's industry, and continuously refine detection rules to reduce false positives and close detection gaps. For Australian organisations facing increasing regulatory scrutiny around security monitoring — particularly under SOCI and CPS 234 — having a functioning SOC capability is becoming a necessity rather than a luxury.

Building an in-house SOC gives the organisation complete control over its security monitoring capability. The team works exclusively for the organisation, develops deep institutional knowledge of the environment, and can tailor detection and response processes to the specific risk profile and business context. There is no reliance on a third party for access to sensitive data, and integration with internal IT and development teams is seamless. For organisations in highly regulated industries or with strict data sovereignty requirements, an in-house SOC may be the only viable option.

However, the costs are substantial. A 24/7 SOC requires a minimum of five to six full-time analysts to cover three shifts with redundancy for leave and attrition — and that is before counting a SOC manager, threat hunters, and detection engineers. In the Australian market, experienced SOC analysts command salaries of $90,000 to $150,000 depending on tier and location, and the cybersecurity skills shortage means roles often take months to fill. Add the cost of SIEM licensing, EDR, SOAR, threat intelligence subscriptions, and the physical or virtual infrastructure to run it all, and an in-house SOC can easily cost $1.5 million to $3 million per year for a mid-size operation.

The technology stack for a functional SOC typically includes a SIEM for log aggregation and correlation (Splunk, Microsoft Sentinel, or Wazuh), an EDR platform for endpoint visibility (CrowdStrike, SentinelOne, Defender for Endpoint), a SOAR tool for automating repetitive tasks and orchestrating response workflows (Palo Alto XSOAR, Splunk SOAR, Swimlane), threat intelligence feeds (MISP, Recorded Future, ASD threat feeds), a ticketing system for incident tracking (ServiceNow, Jira, TheHive), and network detection and response (NDR) tools for east-west traffic analysis (Darktrace, ExtraHop, Vectra AI). The challenge is not just purchasing these tools but integrating them into cohesive workflows and maintaining them over time.

Managed Security Service Providers (MSSPs) and Managed Detection and Response (MDR) vendors operate shared SOCs that monitor multiple client environments simultaneously. By amortising the cost of analysts, tooling, and infrastructure across many customers, MSSPs can deliver 24/7 monitoring at a fraction of the cost of an in-house operation — typically ranging from $5,000 to $30,000 per month depending on the number of endpoints, log sources, and service level. For Australian SMBs that need security monitoring but cannot justify the headcount and tooling investment, an MSSP is often the most pragmatic path.

The trade-offs are loss of direct control and potential gaps in contextual understanding. An MSSP analyst monitoring fifty client environments will never know your network as intimately as an in-house analyst. Alert fatigue across a large client base can lead to slower or less thorough investigations. Data handling and sovereignty must be carefully addressed in the service agreement — ensure that log data is stored within Australia and that the MSSP's own security posture is independently audited. When evaluating MSSPs, ask about analyst-to-client ratios, escalation procedures, SLA response times, and whether the service includes active response (isolating endpoints, blocking IPs) or is limited to alerting and recommendations.

The hybrid SOC model combines internal staff with MSSP services to balance cost, control, and coverage. In a typical hybrid arrangement, the organisation employs a small internal security team (perhaps two to three analysts and a SOC manager) who operate during business hours, handling alert triage, tuning detection rules, conducting threat hunts, and managing the SIEM environment. After hours, weekends, and public holidays, monitoring is handed off to an MSSP that provides Tier 1 triage and escalates confirmed incidents to the internal team via on-call procedures.

This model is increasingly popular among mid-market Australian organisations. It preserves the institutional knowledge and contextual understanding that only an internal team can provide, while eliminating the punishing cost of 24/7 shift coverage. The internal team can focus on high-value activities — detection engineering, threat hunting, incident response, and stakeholder reporting — rather than burning out on overnight alert monitoring. For resellers, the hybrid model is an attractive service offering: provide the MSSP after-hours component while helping clients build and mentor their internal capability.

True 24/7 monitoring is the single biggest cost driver and operational challenge in SOC design. Cyber attacks do not respect business hours — in fact, adversaries deliberately time their activities for nights, weekends, and holiday periods when monitoring is likely to be weakest. Achieving genuine round-the-clock coverage in-house requires a minimum of three shifts, each staffed by at least two analysts for quality and redundancy, plus additional headcount to cover annual leave, sick leave, and inevitable attrition. In the tight Australian cybersecurity labour market, maintaining this roster is a constant struggle.

Automation through SOAR platforms can reduce the human burden by handling routine, well-understood alert types automatically — for instance, automatically enriching alerts with threat intelligence, checking IP reputation, and closing known false positives without analyst intervention. This allows the SOC to do more with fewer people during off-peak hours, but it does not eliminate the need for human oversight entirely. Critical alerts still require experienced human judgement to assess context, make containment decisions, and communicate with stakeholders.

The effectiveness of a SOC depends more on the quality of its analysts than on its tools. A well-structured SOC team typically includes Tier 1 analysts who perform initial alert triage and basic investigation, Tier 2 analysts who handle escalated incidents and deeper forensic analysis, Tier 3 analysts or threat hunters who proactively search for undetected threats, detection engineers who write and maintain correlation rules and SIEM content, and a SOC manager who oversees operations, reports to leadership, and manages continuous improvement. In smaller SOCs, individuals may wear multiple hats, but the core functions must still be covered.

Relevant certifications for SOC analysts include CompTIA Security+, CompTIA CySA+, SANS GCIA and GCIH, and vendor-specific certifications such as Splunk Certified Power User or Microsoft SC-200 Security Operations Analyst. However, certifications are secondary to practical skills — the ability to read and interpret logs, query a SIEM effectively, understand network protocols, and think like an adversary. Many organisations invest in platforms like Hack The Box, TryHackMe, or CyberDefenders to provide ongoing skills development for their SOC teams.