Conferences co-organized
- Workshop on Geometric Group Theory, Part II, Baton Rouge, July 7-10, 2011.
- Special Session on Geometric Group Theory at the Joint Mathematics Meetings, New Orleans, January 6, 2011.
- Workshop on Geometric Group Theory, Goa, India, August 9-14, 2010.
- AMS session on geometric group theory, Baton Rouge, March 28-30, 2008.