· Visiting Scientist, Simons Berkeley Program in Quantum Algorithms, Complexity, and Fault Tolerance2024–2024
· Visiting Scientist, Simons Berkeley Program in Extended Reunion: The Quantum Wave in Computing2022–2022
· Visiting Scientist, Simons Berkeley Program in Quantum Computation2021–2021
· Visiting Scientist, Simons Berkeley Program in Quantum Computing2020–2025
· Visiting Scientist, Simons Berkeley Program in The Quantum Wave in Computing2020–2020
· Visiting Scientist, Simons Berkeley Program in Quantum Hamiltonian Complexity2014–2014
· Former Postdoc, California Institute of Technology
· Professor of Mathematics and Physics, University of Vienna