Ken Sembach has been deeply involved in the scientific, operational, and managerial aspects of the Hubble Space Telescope for the past 15 years. He has served as interim deputy director, Hubble mission head, and Hubble project scientist. Previously, Sembach was the Far Ultraviolet Spectroscopic Explorer (FUSE) deputy project scientist for Large Science Programs from 1996 to 2001 at the Johns Hopkins University. He also was a NASA Hubble Fellow from 1992 to 1995 at the Massachusetts Institute of Technology. Sembach received a B.A. in physics with honors in 1988 from the University of Chicago and a Ph.D. in astronomy in 1992 from the University of Wisconsin-Madison.