PostDoc at Saarland University (2011–2015), Max-Planck-Institute for Computer Science (2011), University of Leipzig and Max-Planck-Institute for Mathematics in the Sciences (2010–2011)
Frequent visiting researcher at institutions including Yale University (USA), Université de Montréal (Canada), University of Southern Denmark, University of Ljubljana (Slovenia), PICB Shanghai, and Nankai University (China)