The Office of Homeland Security (OHS) was developed as a result of legislation passed in 2003. This new agency incorporated critical emergency response entities that were previously part of other agencies.
Public Safety Communications (PSC), which included all County 9-1-1, emergency dispatch and radio system support, had been part of the Office of Information Technology and Communications (OITC). The Office of Emergency Management (OEM) was a division of the Fire/EMS Department. OEM and PSC were combined under the leadership of the DCAO for Public Safety/Director of Homeland Security, forming the Office of Homeland Security. The legislation and resulting changes to the Charter, spelled out the separate and distinct missions assigned to OEM and PSC.