Hannah Lewis is a Ph.D. candidate in the Department of Astronomy at the University of Virginia. Her research, with advisor Steven Majewski, utilizes observations from the Apache Point Observatory Galactic Evolution Experiment (APOGEE) as part of the Sloan Digital Sky Survey. This instrument provides very precise radial velocity measurements for nearby stars. Hannah uses APOGEE observations to determine the properties of stellar companions - including planets and brown dwarfs - and their hosts, in dwarf galaxies and globular clusters. Hannah is a recipient of the Virginia Space Grant Consortium Graduate Research Fellowship.