After her PhD Hložek joined Princeton University as a Lyman Spitzer Jr. Postdoctoral Research Fellow. At Princeton University she prepared for the polarisation-sensitive Atacama Cosmology Telescope. In 2012 she was appointed a Spitzer-Cotsen Fellow at Princeton University. At Princeton she took part in a prison teaching initiative, and formed the Hope-Princeton exchange to bring young black women into Princeton's astronomy departments. She took part in the Story Collider. In 2013 she took part in the Science Train started by Lucianne Walkowicz at Princeton, where she took to the New York City Subway to talk to the public about astronomy.