Previously, she was a postdoctoral scholar at the Carolina Population Center at the University of North Carolina. Dr. Marsh has combined her interests of the black middle class, demography, racial residential segregation, and education to develop a research agenda. This agenda is divided into three broad areas: the black middle class, the intersection of educational attainment and racial identification, and intra-racial health disparities. The common theme in her work is decomposing what it means to be black in America by focusing on intra-group variability in regards to class, space, identity and educational achievement.