Goddard Space Flight Center
Director of Education and Public Outreach, Deep Impact and Dawn missions
Lead, Higher Education and University Programs
Member of the science team for the Near Earth Asteroid Rendezvous mission
Member of an expedition of the Antarctic Search for Meteorites (ANSMET)
Member of the fourth recovery expedition for Almahata Sitta meteorite in northern Sudan
Co-Investigator, Deep Impact and its extended mission EPOXI (Deep Impact Extended Investigation)
Co-Investigator, Dawn mission to the asteroid 4 Vesta and the dwarf planet Ceres
Vice-Chair of the American Astronomical Society's Division of Planetary Sciences
In current role, supports development of future missions exploring our Solar System
