While a strong literature base exists around undergraduate experiences in Science, Technology, Engineering, and Math (STEM), few studies examine how students approach the question of "what's next" after graduation. This study examines the impact of social ties on STEM college seniors' plans to enter the STEM workforce, and how race/ethnicity and gender impact postgraduation planning in STEM. We interviewed a racially diverse sample of 39 STEM college seniors at a predominantly White research institution. Analysis showed that students relied on weak and strong social ties in obtaining job leads and valued diversity in the workplace. Some students of color and women experienced negative social ties (via racism and sexism) during internship experiences, which shaped their thinking around postgraduate opportunities. We discuss implications for equity, as well as recommendations for research and practice.