I am primarily interested in studying cosmology and extragalactic astronomy using observational data, particularly at optical/NIR wavelengths. I am involved in a number of observational studies using Hyper Suprime-Cam on the Subaru Telescope, particularly in the field of strong gravitational lensing. I also perform mass modeling of strong lens galaxies using Hubble Space Telescope imaging and combine this information with measurements of the time delay between multiple images of the background source to constrain cosmological parameters such as the Hubble constant, H0.