The document provides an introduction to the Incident Command System (ICS) for federal workers. ICS is a standardized approach to incident management that is flexible, scalable and used for all hazard incidents in the US. It aims to coordinate response to any type of incident through clear management structures, common terminology, unified command and multi-agency collaboration. The key components of ICS include clear management functions, standardized position titles, an incident action plan and facilities to support response operations.