"Studies of high redshift galaxies require very deep Near-IR imaging. This allows the study of z=2-4 galaxies redward of the Balmer/4000 Angstrom break, and the detection of UV-bright galaxies at z>7. Two new facilities wil revolutionize these studies: the VISTA telescope built for ESO, and the Near-IR channel on WF3 for HST. They will become available at the start of the grant period. We propose to build a group to analyze the imaging data from these facilities. We will make use of the fact that I am Co-PI on the ultra-deep ""ULTRA-VISTA"" survey on the VISTA telescope, and we will analyze public and privately proposed data from WF3. The following science questions will be addressed: (1) what is the origin and evolution of the Hubble sequence out to z=3, (2) what is the evolution of the Luminosity Function of UV bright galaxies between z=6 to z=11, and what galaxies cause re-ionization, (3) how does the mass function of quiescent and star forming galaxies evolve to z=4, and how do the correlation functions of subpopulations evolve as a function of redshift. A crucial component of this proposal is the request for support for a junior faculty position. This person will take on the lead for the highly specialized data processing, and will supervise the analysis of the selection effects, and other crucial components needed for a proper analysis."