My research interests center on galaxy evolution and cosmology.which focuses on cross-instrument and cross-mission science system-engineering issues for the Hubble Space Telescope and the James Webb Space Telescope. I am on the Scientific Advisory Committee for the Large Synoptic Survey Telescope, a wide-field optical survey telescope to be built in Chile, and am a member of the Galaxies Science Collaboration. The survey is expected to start in 2020 and last for 10 years.