| Date | Event |
| Mar 3--7, 2008 | 39th SE International Conference on Combinatorics, Graph Theory, and Computing. Boca Raton, Florida. Plenary speaker |
| May 28--29, 2008 | Fifth Prairie Discrete Mathematics Workshop Winnipeg, Manitoba. Invited speaker |
| Nov 9--14, 2008 | 08w5098 Combinatorial Design Theory Banff International Research Station for Mathematical Innovation and Discovery. Invited Participant |