Accurately representing the small-scale processes of wave-sea ice interactions is critical to simulating ocean mixing and surface fluxes in polar regions. However, these wave interactions are often missing from earth system models. Recent developments to the fully coupled Energy Exascale Earth System Model (E3SM) include simulating the sea ice floe size distribution within the sea ice component of E3SM (MPAS-Sea Ice) and incorporating full two-way coupling between WW3 and MPAS-Sea Ice. These improvements to E3SM allow us to explore the implications of waves in a fully coupled climate system as well as the critical interactions between waves and sea ice in polar regions. Here we will present the new wave - sea ice coupling infrastructure within E3SM as well as some preliminary results highlighting the interactions between waves and sea ice on global climate scales.