Hossenfelder remained in Germany until 2004 as a postdoctoral researcher at the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany.[1] She moved to North America and completed research fellowships at the University of Arizona, Tucson, University of California, Santa Barbara and Perimeter Institute, Canada.[8][9][10] She joined Nordita Institute for Theoretical Physics, Sweden, in 2009 as an Assistant Professor.[11][12] In 2018 she was a Research Fellow at the Frankfurt Institute for Advanced Studies.[13]