• 1993- Professor, Dip. di Elettronica e Informatica, University of Padova
• 1991-1992 Associate Professor, Dip. di Elettronica e Informatica,  University of Padova
• 1990-1991 Associate Professor, Dip. di Scienze dell'Informazione, University of Rome 1
• 1989-2001 Associate Professor, Dept. of Computer Sciences, Purdue University
• 1984-89 Assistant Professor, Dept. of Computer Sciences, Purdue University
• 1979-83 Researcher, Istituto di Automatica, University of Rome
• 1977-79 Researcher, Department of Mathematics, University of Calabria
• 1975-77 Researcher, Istituto di Scienze dell'Informazione, University of Salerno
• 1972-75 Lecturer, Faculty of Architecture, University of Naples

Visiting Positions

Jan-Jul,1988 Visiting Professor, Istituto di Analisi dei Sistemi e Informatica National Research Council, Rome, Italy.

1982-1983 Visiting Scientist, Dept. of Computer Science, Carnegie-Mellon University , Pittsburgh, USA

Summer-78 Visiting Scientist, Dept. of Electrical, Computer and Systems Engineering, Rensselaer Polytechnic Institute , Troy, NY, USA