Kelsey O’Neill completed both her undergraduate and Master's degrees at Virginia Commonwealth University in Richmond, Virginia. She is interested in the relationships between habitat, diet, and chewing adaptations. In addition, she is interested in paleoecology and faunal community structures. Her research has primarily focused on Paranthropus robustus and other primates, both fossil and living. She has collected data at the Ditsong Museum, Wits University, as well as worked at the Gondolin field site, all in South Africa.