Independent Research in cosmological data analysis with ongoing and future surveys (SPHEREx, Simons Observatory, Rubin Observatory's LSST, the Roman Space Telescope, and DESI). Develop theoretical and computational study of large-scale structure. Develop line intensity mapping and its cross-correlations with galaxy and CMB surveys. Develop science concepts in low-frequency gravitational-wave astrophysics and the connection between supermassive/massive black hole astrophysics and GW observations.