Incident Response Planning for Business Continuity
A cyber incident response team (CIRT) is your organisation’s first line of defence when a security incident occurs. Building an effective CIRT is one of the highest-impact investments a CISO can make — yet many organisations approach it reactively, assembling a team mid-incident rather than establishing one before they need it.
Defining Your CIRT Model
There is no one-size-fits-all CIRT structure. The right model depends on your organisation’s size, risk profile, budget, and regulatory environment. The three primary models are:
- Central CIRT — A dedicated team serving the entire organisation. Best for large enterprises with concentrated security budgets and complex environments.
- Distributed CIRT — Security personnel embedded within business units who coordinate during incidents. Better suited for complex multinationals with distinct regional or divisional operations.
- Coordinating CIRT — A small central team that coordinates the response of distributed technical resources. Common in organisations where operational technology, cloud, and traditional IT require specialist response capability.
Core CIRT Roles and Responsibilities
Incident Commander
The incident commander owns the overall response, makes key decisions, and is the single point of accountability. In most organisations this is the CISO or a designated deputy. The incident commander maintains situational awareness, coordinates between technical and business response tracks, and escalates to executive leadership when warranted.
Technical Lead
The technical lead directs forensic investigation, threat containment, and eradication activities. This role requires deep technical expertise across endpoint, network, cloud, and identity — and the ability to direct analysts under pressure.
Communications Lead
Internal and external communications during an incident can significantly affect outcomes — legally, reputationally, and operationally. The communications lead manages messaging to employees, customers, regulators, media, and other stakeholders, working closely with legal counsel.
Legal Counsel
Legal counsel advises on regulatory notification obligations, evidence preservation requirements, potential litigation exposure, and communications strategy. Having established legal relationships before an incident is essential — the middle of a breach is not the time to interview lawyers.
Building CIRT Capability
Skills and Training
Core skills needed within a CIRT include digital forensics, malware analysis, network traffic analysis, cloud security, identity and access management, and threat intelligence. Not every team member needs every skill — build a team with complementary capabilities and use retainers with specialist IR firms to fill gaps.
Tools and Technology
Effective CIRT tooling includes SIEM for detection and analysis, EDR for endpoint visibility and response, network detection and response (NDR), digital forensics platforms, a case management system for incident tracking, and secure out-of-band communications for use when primary channels may be compromised.
Playbooks
Document response procedures for your most likely incident types. At minimum, develop playbooks for ransomware, business email compromise, data exfiltration, insider threat, and DDoS. Good playbooks are specific enough to be actionable under pressure but flexible enough to accommodate the unexpected.
Measuring CIRT Effectiveness
Key metrics for CIRT performance include Mean Time to Detect (MTTD), Mean Time to Respond (MTTR), Mean Time to Contain (MTTC), the percentage of incidents detected internally versus externally, and exercise completion rates. Track these metrics over time to demonstrate programme maturity and identify areas for investment.
For detailed guidance on building and running an effective incident response capability, download the free book Incident Response for Business Continuity, co-authored with Binalyze.
About Author
