Prior to joining the faculty of the University of Athens in 1988, he held teaching and research appointments at the State University of New York and Columbia University respectively (1973-78).
Sula thosaigh sé sa ndámh in Ollscoil na hAithne i 1988, bhí ceapacháin múinteoireachta agus taighde aige in Ollscoil Stáit Nua-Eabhrac agus Ollscoil Columbia faoi seach (1973-78).