David Callahan was born in New Zealand, and did his BA and MA (1st class honours) in English at the University of Auckland, where he won the Fowlds Memorial Prize for the Most Distinguished Student in the Arts Faculty. After living for several years in Australia working with handicapped teenagers and then in Spain as an EFL teacher, he completed a PhD in English at University College London in 1989. His doctoral dissertation dealt with 'The Response of the English Literary World to Spanish Literature, 1909-1939.'
He moved to Portugal in 1987, beginning at the University of Aveiro in that year. He became an Auxiliary Professor in 1992 and an Associate Professor in 1998. [Source: University of Aveiro staff page]