I am a Professor of Astronomy at Harvard University and a senior member of the Institute for Theory and Computation (ITC) at the Center for Astrophysics (CfA). In 2013 I was awarded an Alfred P. Sloan Research Fellowship and a Packard Fellowship in Science and Engineering and in 2017 I was awarded the Helen B. Warner Prize from the AAS. My group studies a broad range of topics in the fields of dark matter, galaxy formation, stellar evolution, and stellar populations using both observational and theoretical tools.