Dr. Kevin D. McKeegan is Professor of Geochemistry and Cosmochemistry at the University of California, Los Angeles. He graduated from St. Lawrence University in 1980 and received a Ph.D. in Physics from Washington University (St. Louis) in 1987. He is Director of the National Science Foundation/UCLA National Ion Microprobe Facility and is an expert on the isotopic and chemical compositions of a wide variety of extraterrestrial samples. He is a co-investigator on the NASA Discovery missions Genesis and Stardust. For Genesis, McKeegan is leading a team to address the top science priorities (oxygen and nitrogen isotopic compositions of the Sun) by constructing a novel accelerator mass spectrometer, named MegaSIMS. For the Stardust mission, McKeegan is science team leader for isotope measurements of the returned microscopic samples of comet P/Wild-2. McKeegan is a member of the AGU, the Geochemical Society, and the Microbeam Analysis Society, and was named Fellow of the Meteoritical Society in 2002. In recognition of his contributions to meteorite science, asteroid 5663 has been named McKeegan by the International Astronomical Union.