An incident management system includes a check-in computer system and a portable data terminal. The check-in computer system is utilized to read information from a plurality of pre-existing identification (ID) cards and utilize at least a portion of the information to create an incident-specific credential for each person responding to an incident. The portable data terminal is configured to read the incident-specific credentials and communicate with the check-in computer system to provide current assignments of personnel responding to an incident such that the personnel can be tracked.