Program Chair

• CogRob2002 The Second International Workshop on Cognitive Robotics Toulouse, France, April, 2002. (co-chair with Chitta Baral)
• DX'2001 The Twelfth International Workshop on Principles of Diagnosis Italy, March 2001. (co-chair with Daniele Theseider Dupre)
• 1999 AAAI Spring Symposium -- Hybrid Systems and AI: Modeling, Analysis and Control of Discrete + Continuous Systems, Stanford, USA, March 1999. (co-chair with Gautam Biswas.)

• ISWC'02: First International Semantic Web Conference (2002)
• WWW11: Eleventh International World Wide Web Conference (2002)
• AAAI: American National Conference on Artificial Intelligence (1994, 1998, 1999, 2000, 2002)
• KR: International Conference on Principles of Knowledge Representation and Reasoning (2002)
• DX: International Workshop on Principles of Diagnosis (1993, 1994, 1997, 1998, 2001)
• DX/QR: Joint International Workshop on Principles of Diagnosis and Qualitative Reasoning (1999)
• NMR: International Workshop on Nonmonotonic Reasoning (2000)
• Common Sense 2001: Fifth Symposium on Logical Formalizations of Commonsense Reasoning (2001)
• AAAI Spring Symposium on Answer Set Programming (2001)
• SWWS'01: Semantic Web Workshop (2001)
• HSCC'02: Hybrid Sysetms: Computation and Control (2002)

Journal Reviewing

• Artificial Intelligence
• Annals of Mathematics and Artificial Intelligence
• Computational Intelligence
• Journal of Logic Programming
• Journal of Artificial Intelligence Research
• Journal of Distributed and Parallel Databases

Conference and Workshop Reviewing

• Canadian Artificial Intelligence Conference (1994)
• European Conference on Artificial Intelligence (1998)
• IJCAI: International Joint Conference on Artificial Intelligence (1997, 1999, 2001)

University Service

• Science Graduate Student Representative, Women in Science Committee, reporting to the Dean of the Faculty of Arts and Science, University of Toronto (4 years).
• Graduate Student Representative, Graduate Committee, Department of Computer Science, University of Toronto, (4 years).