Keegan grew up in Brooklyn, New York. She earned her undergraduate degree in Biomedical Engineering at Harvard College in 2017. During her time at Harvard, she conducted research at the Wyss Institute in the labs of Professor David Mooney and Professor Conor Walsh. After graduating from Harvard, Keegan traveled to Cambridge, England to earn her MPhil in Bioscience Enterprise at the University of Cambridge. Keegan is now back Cambridge, Massachusetts working on her PhD in the Harvard-MIT Health Sciences and Technology (HST) program in the lab of Professor Ellen Roche. Her doctoral research is on the design and development of therapeutic cardiac devices.