Here is a (n incomplete) list of some of old the events that I have organized, or have taken part of.
Interdisciplinary Symposium on Complex Systems 2013
Logic Colloquium 2007
P=NP? Symposium
Logic Colloquium 2006
Goedel Centenary Celebration
2006 Prague-Vienna workshop on Proof Theory and Proof Complexity, Prague
Tf Lunch Seminar