Ele era um professor de Transfiguração . De Câmara dos Segredos , Tom Riddle diz a Harry:
'Only the Transfiguration teacher, Dumbledore, seemed to think Hagrid was innocent. He persuaded Dippet to keep Hagrid and train him as gamekeeper. Yes, I think Dumbledore might have guessed. Dumbledore never seemed to like me as much as the other teachers did...' (CHAPTER SEVENTEEN, The Heir of Slytherin)