I combine observational and theoretical research to study the structure and dynamics of galaxies. Much of my research has focussed on the evidence for massive black holes in galactic nuclei, but I work on other topics as well. The observational aspects of my research include optical and near-IR imaging and spectroscopic observations, and the development of new data analysis techniques. My theoretical work consists of dynamical modeling and N-body simulations. Some ongoing projects are: NICMOS imaging of merger remnants; evidence for black holes in NGC 7052 and IC 1459 from the dynamics of nuclear gas disks; and the dynamics of galaxy clusters inferred from the CNOC database.