This three-year Project Grant from the National Science Foundation's Division of Atmospheric and Geospace Sciences Geosciences program (CFDA 47.050) provides $545,775 to Predictive Science Incorporated for research into coronal mass ejection interactions. Through magnetohydrodynamic simulations based on idealized configurations modeling different coronal mass ejection interaction scenarios, the awardee will address key science questions around identifying characteristic signatures of coronal mass ejection interactions, determining overall structures of such events, and properties leading to maximum geoeffectiveness. The work will lay the groundwork for comprehensive understanding of coronal mass ejection interaction processes in the inner heliosphere applicable to future analyses. The award supports an early career woman principal investigator and undergraduate student researchers, reflecting the National Science Foundation's mission to strengthen the national scientific enterprise.