Professional Experience

• 2013 – present: Rachleff Professor, Department of Computer and Information Science, UPenn.
• 2001 – 2005: Associate Dean, School of Engineering and Applied Science
• 1987 – present: Professor, Department of Computer and Information Science (CIS), UPenn..
• 1990 – 1994: Department Chair, CIS, UPenn.
• 1979 –1986: Associate Professor, Department of CIS, UPenn
• 1986 – present: Graduate Group, Department of Bioengineering, UPenn.
• 1985 – 1990: Graduate Group, Department of Mechanical Engineering and Applied Mechanics, UPenn.
• 1974 – 1979: Assistant Professor, Department of CIS, UPenn.
• 1973 – 1974: Lecturer, Department of Computer Science, University of Toronto.