Amos Diggory worked in the Department of Regulation and Control of Magical Creatures. This department was situated in the British Ministry of Magic. Amos had visited Hogwarts School of Witchcraft and Wizardry several times on Ministry business and knew Hagrid quite well. He was also a highly skilled wizard and well respected in the Ministry as was seen in Harry Potter and the Goblet of Fire when he led the Aurors to the newly cast Dark Mark.