Scientific Program Organization - A
- Organizing Committee, First Congress of PRIMA, the Pacific Rim Mathematical Association, Sydney, Australia (2009).
- Co-president, Second Canada-France Congress, Montréal (2008).
- Chair, Organizing Committee for the First Canada-China Congress, Tsinghua (1999).
- Chair, Organizing Committee for the Second Canada-China Congress, Vancouver (2001).
- MITACS Annual General Meetings: Toronto (2000),
Montréal (2001), Vancouver (2002).
- Chair of Scientific Committee for the PIMS Thematic Programmes: Variational Methods in Partial Differential Equations (2000), Asymptotic Geometric Analysis (2002), Partial Differential Equations and Applications (2009).
- AMS-CMS workshops on Partial Differential Equations:
AMS-CMS meeting (Vancouver, 1993), AMS meeting (Claremont,1993), CMS
(Victoria, 1997), CMS (Vancouver, 2000).
- Other: John Charles Fields Legacy Symposium, Toronto (2000), Pan-American Advanced Studies Institute, Santiago (2003), "Renaissance Banff Conference": Mathematical Connections in Art, Music, and Science, Banff (2005), PASI-2007 and Americas Conference in Differential Equations, Cartagena, Columbia (2007).