The Headmaster/Headmistress
The Headmaster/Headmistress of Hogwarts is in charge of the whole school, they usually teach a class. (Vincent Majere*)
Deputy Headmaster/Headmistress
The deputy headmaster or headmistress takes up the headmaster's job if he is sick or on leave.
(James William Wilson)
Heads of Houses
The heads of houses have to regulate their house by choosing quidditch captains and prefects.
Head of Gryffindor (James William Wilson~)
Head of Hufflepuff (OPEN)
Head of Ravenclaw (OPEN)
Head of Slytherin (OPEN)
Teachers of Hogwarts
The hogwarts professors have to teach their subject well to the students. For more on how to teach, check the teachers guide. Not teaching adequately will result in the teacher being fired and replaced. A teacher gets 500 per month.
Care of Magical Creatures Professor (Thaorson Kam Elldir)
Herbology (Robert Andrew Dent/Jenifer Elizabeth Dent)
Charms -(Keera Mast)
Transfiguration Professor (William Winston McCoy)
Defense Against the Dark Arts Professor (James William Wilson)
Alchemy (Vincent Majere)
Divination (Rhea Belacqua)
Potions (Edgar Albert Doyle)
Dark Arts (Sandra Archer)
Substitute Professor 1 (Fleur Weasley~)
Substitute Professor 2 (Hyde Kazama~)
Substitute Professor 3 (Louis Parish~)
Substitute Professors (OPEN x1)
Nurses
Nurses have to heal the students of Hogwarts from the various injuries that happen to them. The nurses get 400 per month.
Hogwarts Nurse (Gackt Kazama~)
Hogwarts Nurse (Calista Ferdinand~)
Hogwarts Nurse (OPEN)
Others
Hogwarts Gamekeeper [300] (OPEN)
Hogwarts Librarian [300] (Abby Kari~)
by 
I'm roleplaying asking Vincent for the position, if thats okay?
