A community safety system (CSS) including a notification management entity (NME) comprising servers, the NME communicatively coupled to multiple user devices and one or more administrator devices (collectively, registered user devices). The CSS includes a plurality of registered users, wherein each registered user is associated with an organization, and a user category of a set of user categories. The NME may maintain a list of the registered users and associated information. The registered users may have user devices including a CSS application operating thereon. In some embodiments the CSS enables inter-organizational communication, allowing for members of a first organization to provide alerts that the NME can pass to a second organization when the registered user is physically located within a security zone associated with a second organization but not a member of the second organization.