The CESM Polar Modeling Workshop for early career scientists will take place August 12 to 16, 2019, at the National Center for Atmospheric Research Mesa Laboratory in Boulder, Colorado. Participants will gain hands-on experience planning, designing, executing, and analyzing earth system modeling experiments to understand a changing polar climate system and to explore better methods to integrate models and observations. Participants will engage in advanced activities focused on capacity building for using CESM in polar research (e.g., sea ice, land ice, atmosphere, ocean, land, paleoclimate).