I am an observational cosmologist working in the fields of reionization, galaxy evolution, cluster cosmology and cosmic backgrounds. My group is active in science with Planck, Euclid, Herschel and the Spitzer Space Telescope in addition to a range of ground-based astronomical observation facilities such as Palomar, Keck, CSO, CARMA and ALMA. We are also involved in developing the next generation of small explorer missions in collaboration with JPL.