Talk in the special session, Combinatorial Representation Theory, Topological Combinatorics, and Interactions Between Them in the Spring Central Section Meeting of the AMS at Indiana University (6 April 2008).

Attending Festive Combinatorics, Symposium in honor of Anders Björner's 60th Birthday. Royal Institute of Technology (KTH), Stockholm, Sweden. (May 28-30, 2008)

Invited talk at the Billerafest, a conference in celebration of Louis Billera's 65th Birthday (14 June 2008).

2006, 2007, 2008, 2009. 2010, 2011, 2012, 2013. 2014, 2015, 2016 and 2017.