Dr. Reitz is a medical doctor and genetic epidemiologist. Her research focuses on the identification of genetic and non-genetic factors that contribute to Alzheimer's disease, frontotemporal lobar degeneration, and structural and functional brain changes.

She has been involved in a number of gene mapping and genetic epidemiology projects as well as non-genetic population-based studies that explore Alzheimer's disease, vascular cognitive impairment, cerebrovascular disease and other aging traits.