1. Albus Dumbledore - Headmaster, Professor of Transfiguration (later retired), and Professor of Defense Against the Dark Arts (also retired).
2. Minerva McGonagall - Deputy Headmistress and Professor of Transfiguration.
3. Severus Snape - Potions Master and Head of Slytherin House (later Headmaster).
4. Rubeus Hagrid - Care of Magical Creatures Professor and Groundskeeper.
5. Pomona Sprout - Herbology Professor and Head of Hufflepuff House.
6. Filius Flitwick - Charms Professor and Head of Ravenclaw House.
7. Horace Slughorn - Potions Master (after Professor Snape, before Professor Snape again) and Head of Slytherin House.
8. Quirinus Quirrell - Defense Against the Dark Arts Professor (later revealed as a host of Lord Voldemort).
9. Gilderoy Lockhart - Defense Against the Dark Arts Professor (exposed as a fraud).
10. Remus Lupin - Defense Against the Dark Arts Professor (former werewolf and close friend of Harry's father).
11. Alastor Moody (Barty Crouch Jr. disguised) - Defense Against the Dark Arts Professor (secretly working for Lord Voldemort).
12. Dolores Umbridge - Defense Against the Dark Arts Professor (sent by the Ministry of Magic to control Hogwarts).
13. Sybill Trelawney - Divination Professor (known for her eccentric predictions).
14. Septima Vector - Arithmancy Professor.
15. Bathsheda Babbling - Ancient Runes Professor.