CBRN training — the four-level curriculum
CBRN (Chemical, Biological, Radiological, and Nuclear) defence training is structured across four levels, each with a defined audience, learning outcome, and competency standard. Level 1 — Awareness — is designed for any personnel who may be first on scene at a CBRN incident: they learn to recognise indicators, avoid self-contamination, establish a safe perimeter, and trigger the correct response chain. This level is appropriate for frontline security personnel, facility managers, reception and access-control staff, and event management teams operating in environments assessed as at risk.
Level 2 — Basic — builds operational first-response capability: contamination detection equipment, initial sampling protocols, PPE donning and doffing, and basic decontamination procedures. Level 3 — Advanced — is for personnel who lead or coordinate CBRN response: incident command, detailed detection methodology, technical decontamination, and liaison with specialist emergency services. Level 4 — Specialised — covers full technical specialist capability including advanced analytical equipment, complex decontamination operations, and the investigation and evidence-collection procedures that may follow a CBRN incident.
Training at every level is delivered by instructors with operational CBRN experience, not classroom-only trainers. Scenario-based exercises form the majority of contact time at Levels 2, 3, and 4. Competency is assessed against a defined standard and documented; graduates receive written certification that is valid for the regulatory and insurance contexts in which it may be required. Refresher cadence depends on the level and the operating environment and is specified at programme outset.

