My research involves the study of dust in various astrophysical environments: circumstellar, interstellar, and extragalactic. I am studying how dust grain properties change from quiescent cloud to star-forming cloud to circumstellar environments to supernova ejecta. With my collaborators, I am modeling dust on microscopic and macroscopic scales to determine the role of dust in the energy budget of these various environments. We use extinction, polarization, abundance and spectroscopic observations from the UV to the IR for the same sightlines obtained from the Hubble and James Webb Space Telescopes as well as other space- and ground-based telescopes.