This list is not exhaustive. * indicates invitation to speak, links are provided where they still exist.
2010 International Congress of Mathematicians (Hyderabad, India)
2010 Workshop on Geometric Group Theory (Goa, India)
2010 Program on Geometry, Topology and Dynamics of Character Varieties (Inst. Math. Sci., Singapore)
2010 Groups and large-scale geometry (Clermont-Ferrand, France)
2010 Workshop within the Trimester Program "Teichmueller Space" (HIM, Bonn)
2009 New directions in geometric group theory (University of Queensland)
2009* XXIst Nevanlinna Colloquium (Kyoto University) :: plenary speaker at the invitation of Professor Kojima
2009* Topology and Computers (T. I. Tech.) :: plenary speaker at the invitation of Dr. Eiko Kin
2009* Chulalongkorn University :: speaker at the invitation of Professor Hemakul
2009 Dynamics and Geometry of Teichmueller space
2009* Geometry and Topology Seminar (University of Chicago, IL) :: seminar speaker at the invitation of Dr. David B. McReynolds
2008* Algebraic Topology, Braids and Mapping Class Groups (National Uni. of Singapore) :: plenary speaker at the invitation of Professors Jie Wu and Tan
2008* University of Tokyo Topology Seminar :: speaker at the invitation of Professor Toshitake Kohno
2007* All Japan Topology Symposium (Aizu University, Fukushima, Japan) :: plenary speaker at the invitation of Professor Iwase
2007 Teichmueller Theory and Kleinian Groups (MSRI)
2007* Low dimensional geometry and topology (Warwick University, UK) :: plenary speaker at the invitation of Professors Bowditch and Series
2007 Groups007 (CIRM Marseille)
2006* Topology of Knots IX (Nihon University) :: plenary speaker, at the invitation of Professor Kimihiko Motegi
2006* Hyperbolic 3-manifolds and Arithmetic Groups (RIMS Kyoto University, Japan) :: plenary speaker at the invitation of Professor Fujii
2006* Topology and Computers (Osaka Sangyo University, Japan) :: plenary speaker at the invitation of Dr. Ichihara
2006* 3 and 4-dimensional topology (Hiroshima University, Japan) :: plenary speaker at the invitation of Professor Sakuma
2005* Spaces of negative curvature programme (EPFL, Switzerland) :: plenary speaker at the invitation of Professors Bavard, Buser and Kellerhals
2004* Warwick Mathematics Colloquium :: speaker at the invitation of Professor Series
2004* Universitaet Bonn :: speaker at the invitation of Professor Hamenstaedt