Department of Aurors

The Department of Aurors serves as the headquarters of the American Aurors and operating under the jurisdiction of the Magical Congress of the United States of America and specifically tasked with the capture of dangerous criminals. As there are several Auror Divisions throughout the the United States, the Department of Aurors presumably function as a command center from where the highest-ranking officials oversee and coordinates the various Auror Divisions. It is not unthinkable that the Department of Auror Divisions might work, at least partially, per the direction of the Major Investigation Department in the event of "very major incidents" that demands more people to deal with it. The American Aurors are also militarized to a greater extent than their British counterparts, carrying ranks such as "Captain" and "Commander", which may give some insight into how these divisions goes about their work and how it differs from that of the British Auror Department.

Behind the scenes

 * Although not confirmed, based on the name, it is possible that the local branches of the Federal Bureau of Covert Vigilance and No-Maj Obliviation also houses the Auror Divisions in that area, since the "vigilance" has become a mantra of sorts used by Aurors. (Such as Alastor Moody's "Constant vigilance!" or MACUSA's "Always Stay Vigilant!")