From 2010 to 2013, Vieregg was a postdoctoral fellow of the National Science Foundation 's Office of Polar Programs, at the Harvard-Smithsonian Center for Astrophysics, where she continued research on the ANITA experiment, and also worked on the Keck Array polarimeter. In 2014, Vieregg joined the University of Chicago faculty as assistant professor, and was promoted to associate professor in 2019.