Acts as a component of the NMS (Ndc80-MIND-Spc7) super complex which has a role in kinetochore function during late meiotic prophase and throughout the mitotic cell cycle. Essential for chromosome segregation and bipolar sister chromatid association. Required for kinetochore targeting of MIND; but not Ndc80 complex components. {ECO:0000269|PubMed:22711988}.