Auror Office

"Level two, Department of Magical Law Enforcement, including the Improper Use of Magic Office, Auror Headquarters, and Wizengamot Administration Services."

- Location of Auror headquarters

The Auror Office, alternatively known as Auror Headquarters, served as the headquarters of the Aurors of Great Britain. The department was a main division of Department of Magical Law Enforcement. It specifically dealt with the capture of Dark Witches and Wizards. In other words, Aurors were essentially the wizarding equivalent of the Muggle police force/detectives, and their headquarters operated as their base of operations.

Location
"A lopsided sign on the nearest cubicle read: Auror Headquarters."

- Inside the Department of Magical Law Enforcement

Located on level two of the Ministry of Magic Headquarters, Mr Weasley took Harry Potter through the office before his disciplinary hearing.

Auror Headquarters consisted of a series of open cubicles, with each Auror being assigned a space to work. The cubicles were decorated with pictures of known Dark wizards, maps, clippings from the Daily Prophet, and other odds and ends. Kingsley Shacklebolt's cubicle was located at one end.

The description of the Auror Headquarters as "a cluttered open area divided into cubicles, which was buzzing with talk and laughter" impressed Harry, who was thinking about becoming an Auror once he left Hogwarts.

The job
Primarily speaking, an Auror's job was to hunt down and capture Dark Wizards. Once a criminal was apprehended, they were usually placed in custody while awaiting trail to answer for any crimes they committed. It was not uncommon for criminals to resist arrest, however; with some choosing to fight to the death rather than let themselves be captured, such as Death Eater Evan Rosier.

In times with a drop in dark magical activity for them to combat, however, Aurors have also been called upon to patrol hidden and protected magical creature habitats in an attempt to ward off or capture wizard poachers trying to steal magical creatures to extract valuable bits and bobs from them, with poachers being such a common occurrence that most Aurors in Great Britain had run-ins with them throughout their careers.

The Ministry of Magic would also enlist Aurors to guard high profile targets, such as the escort that saw Harry Potter safely to Platform 9¾ during the 1996-1997 school term, and the British Prime Minister had a bodyguard assigned to him from the Auror Office that posed as his secretary in order to protect him against the possibility that Lord Voldemort might take control of him to gain access to various Muggle resources at the highest level.