· Ronald C. and Antonia V. Nielsen Professor of Computing and Information Science, Cornell University2010–
· Associate Professor, Cornell University2003–2010
· Director, Intelligent Information Systems Institute, Cornell University2001–2008
· Research Assistant, Cornell University1998–2000
· Researcher, Air Force Research Laboratory1993–1998
· PhD in Computer Science, University of Edinburgh1993–
· Teaching Assistant, University of Edinburgh1990–1992
· Research Analyst, Air Portugal1987–1989
· M.Sc. in Applied Mathematics, Technical University of Lisbon1987–
· Bachelor's degree, University of Lisbon1982–