This symposium aims to focus on the intersection of dark energy and dark matter with galaxy formation and evolution. It will explore the novel research that is possible only with large cosmic surveys and simulations and discuss how the community will be able to optimize scientific output with Roman in the future. Topics of discussion will include, but are not limited to, the expected impacts from Roman observations of galaxy clustering (including BAO/RSD), weak lensing, galaxy clusters, supernova cosmology, stellar streams, and dwarf galaxies. It will strive to foster synergies between contemporaneous experiments to Roman, such as Euclid, Rubin, DESI, Simons Observatory, and SPT. The schedule will feature invited talks, contributed talks, posters, discussion panels, and fun social activities.