``Non-crossing partitions in surprising locations,'' Kieval Lecture Series Talks, Southern Oregon University, Ashland, Oregon, May 2007
``Using Curvature to average trees,'' Kieval Lecture Series Talks, Southern Oregon University, Ashland, Oregon, May 2007
``Roots, Ratios and Ramanujan,'' Sigma Xi Invited Lecture, Southern Oregon University, Ashland, Oregon, May 2007
``Keeping your research program active,'' Project Next panel discussion, Joint Math Meetings, New Orleans, Louisiana, January 2007
``Mission Impossible: learning what cannot be done,'' Sigma Xi lecture, Lafayette College, Easton, Pennsylvania, September 2006
``Regular polytopes are everywhere,'' Graduate student colloquium, University of California, Santa Barbara, September 2006
``Square dancing in the pure braid group,'' Putnam reunion, Bethel College, Kansas, March 2005
``Non-crossing partitions in surprising locations,'' Eastern Pennsylvania and Delaware Section of the MAA, November 2004
``From Differential Geometry to Word Hyperbolic Groups: A combinatorial model of an analytic concept'', Survey talk, University of California, Santa Barbara, October, 2002
``Metric trees in topology, geometry, and group theory,'' Workshop in Linear Analysis and Probability, College Station, Texas, August 2001
``The tea-kettle on the table by the stove: a talk in honor of Dr. Arnold M. Wedel,'' Bethel College Fall Festival, October 1997
``From Differential Geometry to Word Hyperbolic Groups: A combinatorial approach to an analytic concept,'' Mathematics Graduate Student Organization, Texas A&M University, October 1998
``Roots, ratios, and Ramanujan,'' Pi Mu Epsilon, Texas University, April 2001