Since 2015: Leading scientist, DESY, Hamburg, Germany
Since 2015: Professor (W3) for Theoretical Particle Cosmology, Universität Hamburg, Germany
2013–2015: ICREA Research professor, Institut de Fisica d'Altes Energies (IFAE), Barcelona, Spain
2008–2013: Junior staff scientist, CERN, Geneva, Switzerland (ERC Starting Grant)
2006–2008: Fellow in Theory Division, CERN, Geneva, Switzerland
2003–2013 (on leave after 2008): Research Scientist, Institut de Physique Théorique, Centre de Saclay (CEA), France
2001–2004: Joint Research Fellow, University of Chicago (Enrico Fermi Institute) and Argonne National Laboratory, USA
1998–2001: Doctorate in Physics, Université Paris XI and CEA Saclay, France
1994–1998: Degree in Physics, École Normale Supérieure de Lyon, France

Since 2023: Member of the Einstein Telescope Collaboration
2023: Member of the ‘Georges Lemaîre Prize’ Scientific Committee
Since 2022: Chair of the Scientific Advisory Board, Max Planck Institute for Physics, Munich, Germany
Since 2022: Member of the GW Space 2050 Working Group
2022: Member of the Ramón y Cajal panel, Spain
2020–2023: Member of the award jury of the Hamburg Prize for Theoretical physics
2019, 2021: Member of the EPS-HEP prize committee
Since 2019: Deputy Spokesperson of the Cluster of Excellence “Quantum Universe”, Universität Hamburg, Germany
Since 2018: Member of the High Energy Particle Physics Board, European Physical Society (HEPEPS), secretary since 08/2023
2018–2024: Chair of the Advisory Board, Mainz Institute for Theoretical Physics (MITP), Germany
Since 2015: Leader of theoretical particle cosmology group at DESY
Since 2013: Member of the LISA Consortium
2012–2018: Member of the Program Advisory Committee, Munich Institute for Astro- and Particle Physics (MIAPP), Germany
2009–2017: Member of the Scientific Committee, Institut d’Etudes Scientifiques de Cargèse (IESC), France