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| 2018 - | Director of Studies, Leiden Observatory | |
| 2012 - 2017 | Chairman Educational Committee Astronomy, Leiden Observatory | |
| 2011 | Full Professor: Chair for Laboratory Astrophysics, Leiden University | |
| 2009 | VICI laureate - Unlocking the Chemistry of the Heaven | |
| 2009 | Associate Professor (UHD1), Leiden Observatory | |
| 2008 - 2013 | Special Chair for Molecular Laboratory Astrophysics, LCVU Amsterdam | |
| 2005 | Associate Professor (UHD2), Leiden Observatory | |
| 2005 | Director Laboratory for Astrophysics, Leiden Observatory | |
| 2003 - 2005 | Senior researcher Laser Centre Vrije Universiteit Amsterdam | |
| 2002 | FOM Springplank laureate (~ VIDI grant) | |
| 2002 | Habilitation (PD) in Physical Chemistry (University of Basel, CH): 'High resolution spectroscopy of ions, radicals and ionic complexes in the gas phase' | |
| 1996 - 2002 | Senior researcher, University of Basel | |
| 1994 - 1995 | NWO Talent grant / Postdoctoral stay IAP Bonn | |
| 1994 | PhD thesis (University of Nijmegen) 'Infrared and Far Infrared Spectroscopy of Transient Species' | |
| 1990 - 1994 | PhD research, Molecular and Laser Physics, Nijmegen | |
| 1989 - 1990 | Junior researcher MPI Stromungsforschung Gottingen | |
| 1984 - 1989 | Study experimental physics, University of Nijmegen | |
| 1978 - 1984 | Gymnasium Beta 'Rolduc', Kerkrade | |