I am a Senior Research Scientist at Southwest Research Institute studying terrestrial planet formation and the geology of small airless bodies. Present research focuses on new modeling techniques for terrestrial planet formation and granular dynamics related to NASA's OSIRIS-REx Asteroid Sample Return mission. In the past I have studied the formation mechanisms of binary asteroids in the Solar System, the history of Saturn's bizarre moon Iapetus, the four small satelites of Pluto and various topics related to small body dynamics and been involved in a couple observing projects (Eulalia/Polana family members, the Deep Impact mission and Irregular Jovian Satellites).