Organizational structures for incident management (ICS and EOCs) are modular, meaning that they are each building blocks that are put in place as needed based on an incident’s size, complexity and hazards.

The ICS Commander and EOC Director are responsible for the establishment and expansion of the modular organization based on the specific requirements for their incident.

As incident complexity increases, the organizational structure expands and management responsibilities are further divided.

The number of management, supervisory, and support positions expand as needed to meet the needs of the incident.