A simple BungeeCord plug-in which allows your staff team to communicate with each other server-wide.
/staffchat <message><message>- The message that you want to alert to all staff on the network.
/staffchat toggle- This will allow you to join or to leave the staff channel (You will still receive the messages).
staffchat.use- This will allow player's to execute the staffchat command, and to see the messages.
You can download the plug-in here: https://www.spigotmc.org/resources/bungeestaffchat.7484/