Keeper of Keys and Grounds

The Hogwarts gamekeeper (also known as the Hogwarts groundskeeper) is a Wizard employed by Hogwarts School of Witchcraft and Wizardry to tend to and look after the grounds of the school, as well as the security of Hogwarts Castle.

Duties
The Hogwarts gamekeeper had many duties, including:
 * Looking after the school's keys.
 * Escorting first year students on the boats to the castle.
 * Tending to the gardens at Hogwarts.
 * Performing special tasks for the Headmaster and Professors at the school.
 * Looking after magical beasts on the school grounds.
 * Tending to matters in the Forbidden Forest.
 * Bringing the twelve Christmas trees into the Great Hall during December.

Known Hogwarts Gamekeepers

 * Ogg - 1949 or earlier until 1957 or later
 * Rubeus Hagrid - 1990 or earlier until 1998 or later.

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (film)
 * Harry Potter and the Philosopher's Stone (video game)
 * Harry Potter and the Chamber of Secrets
 * Harry Potter and the Chamber of Secrets (film)
 * Harry Potter and the Chamber of Secrets (video game)
 * Harry Potter and the Prisoner of Azkaban
 * Harry Potter and the Prisoner of Azkaban (film)
 * Harry Potter and the Prisoner of Azkaban (video game)
 * Harry Potter and the Goblet of Fire
 * Harry Potter and the Goblet of Fire (film)
 * Harry Potter and the Order of the Phoenix
 * Harry Potter and the Order of the Phoenix (film)
 * Harry Potter and the Order of the Phoenix (video game)
 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Half-Blood Prince (film)
 * Harry Potter and the Deathly Hallows
 * Harry Potter and the Deathly Hallows (film)