The GOES-R Space Environment In-Situ Suite (SEISS) will include an energetic heavy ion sensor. The Energetic Heavy Ion product measured by this sensor will measure energetic heavy ion fluxes in the Earth’s magnetosphere. Information provided by this product will be used in tandem with the Magnetic Energetic Ion products, as well as the Solar and Galactic Proton product to provide a comprehensive picture of the energetic particle environment surrounding the Earth. This information will aid scientists in assessing the risk of radiation posed to astronauts and high altitude aircraft. These ions cause many of the same issues as the Solar & Galactic Protons, although the energy levels required for ions to have the same effect can be lower. This heavy ion product will give forecasters, operations personnel, and spacecraft designers critical data which will improve capability to mitigate Single Event Effects (SEEs), Total Ionizing Dose (TID), and biological effects.