The Threat Alert System (TAS) is a patent pending alert notification system designed to immediately notify law enforcement, first responders, employees and designees selected by the client, in the event of an active shooter or workplace violence incident within an organization. The TAS has no limitations and can communicate from single to multi level structures. TAS utilizes text, push and e-mail notifications, audible alarms and visible strobes to notify end users and first responders of the Threat.