A Security Operations Centre (SOC) is a centralised team — supported by technology and processes — that monitors, detects, analyses, and responds to cyber security incidents around the clock. Think of it as a 24/7 security command centre watching over your digital assets. But does every business need one?
What a SOC Does
Continuous monitoring: The SOC monitors security events from across your environment — firewalls, endpoints, servers, cloud services, applications, and network devices. They watch for suspicious patterns, anomalies, and indicators of compromise in real time.
Threat detection: Using a combination of SIEM (Security Information and Event Management) tools, threat intelligence feeds, and analyst expertise, the SOC identifies potential security incidents from the noise of millions of daily log events.
Incident response: When a genuine threat is detected, the SOC coordinates the response — isolating affected systems, containing the threat, preserving evidence, and coordinating with other teams for remediation.
Threat intelligence: The SOC maintains awareness of the current threat landscape — new vulnerabilities, emerging attack techniques, and industry-specific threats. This intelligence informs detection rules and defensive priorities.
SOC Models
In-house SOC: Built and staffed entirely within your organisation. Provides maximum control and deep knowledge of your environment. However, it is expensive — 24/7 coverage requires 8-12 analysts minimum, plus SIEM licensing, threat intelligence subscriptions, and ongoing training. Realistic only for large enterprises with substantial security budgets.
Managed SOC (MSSP/MDR): A third-party provider delivers SOC capabilities as a service. Managed Detection and Response (MDR) providers deploy their tools on your infrastructure and monitor from their SOC. Cost-effective for SMEs — you get 24/7 monitoring without building a team. The trade-off is less customisation and potential response delays.
Hybrid SOC: Combine in-house security staff for day-to-day operations with an MSSP for 24/7 monitoring, after-hours coverage, and specialised threat hunting. Balances control with cost efficiency. This is often the best fit for mid-sized organisations.
Virtual SOC: Part-time analysts with automated tools — no dedicated physical facility. Uses cloud-based SIEM and automated response playbooks. Suitable for smaller organisations as a stepping stone to more mature models.
When You Need SOC Capabilities
You need some form of SOC capability if you: process sensitive customer data (personal information, payment data, health records), have compliance requirements that mandate monitoring (PCI DSS, ISO 27001, SOC 2), operate internet-facing services that are targets for attack, have experienced security incidents and want to improve detection, or serve clients who require evidence of security monitoring.
Starting Small: SOC for SMEs
You do not need to build a full SOC to get SOC-like benefits. Start with these affordable steps: deploy a cloud SIEM or log management solution, enable logging across all critical systems, set up automated alerts for high-priority security events, subscribe to an MDR service for professional monitoring, and designate an internal security champion to manage alerts and coordinate with the MDR provider. This gives you detection capability without a full-time SOC team.
Key Metrics
Measure SOC effectiveness with: Mean Time to Detect (MTTD) — how quickly threats are identified; Mean Time to Respond (MTTR) — how quickly they are contained; false positive rate — how many alerts are non-issues; and incidents by category — understanding your threat profile. These metrics guide investment decisions and operational improvements.
Choosing an MDR Provider
Evaluate based on: detection capabilities and technology stack, industry experience, response SLAs, integration with your existing tools, compliance support, threat intelligence sources, and reporting quality. Request references from similar-sized organisations in your industry. Start with a proof of concept to evaluate their effectiveness before committing long-term.
