Mitglied im Organisationskomitee von International School of Cosmic Ray Astrophysics, Erice - ISCRA 2024 23rd course: Multi-Messenger Astroparticle Physics (brochure) GCOS Workshop 2023 International School of Cosmic Ray Astrophysics, Erice - ISCRA 2022 22nd course: From cosmic particles to gravitational waves, now and to come (brochure) (poster) 27th European Cosmic Ray Symposium ECRS 2022 GCOS Workshop 2022 Modelling the Galactic Magnetic Field, Lorentz Center Leiden 2021 GCOS Workshop 2021 24th Symposium on Astroparticle Physics in the Netherlands 2019 Cosmic ray vision from the southern sky - ISAPP 2019 @ the Pierre Auger Observatory LHC meets Cosmic Rays - ISAPP 2018 (poster) International School of Cosmic Ray Astrophysics, Erice 21st course: Astroparticle Physics: yesterday, today, and tomorrow - The 40th anniversary of the International School of Cosmic Ray Astrophysics 2018 (INDICO) (brochure) 26th European Cosmic Ray Symposium 2018 (poster) 23rd Symposium on Astroparticle Physics in the Netherlands 2018 The dark and visible side of the universe - ISAPP 2017 (poster) Neutrinos in Physics, Astrophysics and Cosmology - ISAPP 2017 (poster) 22nd Symposium on Astroparticle Physics in the Netherlands 2017 A Bayesian View on the Galactic Magnetic Field, Lorentz Center Leiden 2017 (poster) The Many Facets of Astrophysics - Photons, Particles, and Spacetime, Annual Meeting of the German Astronomical Society, Jointly Organized with the Nederlandse Astronomenclub, splinter meeting High-Energy Astrophysics 2016 International School of Cosmic Ray Astrophysics, Erice 20th course: Particle, Gamma-ray and Neutrino Astrophysics in the 21st Century 2016 (brochure) 7th International Conference on Acoustic and Radio EeV Neutrino Detection Activities 2016 21st Symposium on Astroparticle Physics in the Netherlands 2016 34th International Cosmic Ray Conference, Den Haag, 2015 20th Symposium on Astroparticle Physics in the Netherlands 2015 International Space Science Institute ISSI, Bern 2014 International Team 323, Bayesian modeling of the Galactic magnetic field International School of Cosmic Ray Astrophysics, Erice 19th Course: Exploring the High Energy Universe 2014 (brochure) 19th Symposium on Astroparticle Physics in the Netherlands 2014 Physics@FOM Veldhoven - Focus session F05 Signals from the most extreme objects in the universe, 2014 Dutch CTA Science Day 2013 17th Symposium on Astroparticle Physics in the Netherlands 2013 (poster) International School of Cosmic Ray Astrophysics, Erice 18th Course: A new era in particle astrophysics 2012 (brochure) Nijmegen12 - 4th International Summer School on Astroparticle Physics 2012 (poster) LOFAR workshop: First science with LOFAR 2011 Magnetic Fields in the Cosmos 2011 Dutch Auger Meeting 2010 NAC 2010: 65th Dutch Astronomy Conference 13th Symposium on Astroparticle Physics in the Netherlands 2010 13th International Conference on Elastic & Diffractive Scattering Cosmic-ray physics and related studies at LHC 2009 Radio @ Auger Workshop, January 2009 37th COSPAR Scientific Assembly E19 Origin, Acceleration and Propagation of Cosmic Rays in the Galaxy 5th Fluorescence Workshop 2007 36th COSPAR Scientific Assembly E1.7 Origin, Acceleration and Propagation of Cosmic Rays in the Galaxy VIHKOS CORSIKA Schule 2005 Arbeitstreffen Astroteilchenphysik in Deutschland 2003 Arbeitstreffen über die Zusammensetzung hochenergetischer kosmischer Strahlung 2000

Mitglied im International Advisory Committee von 28th European Cosmic Ray Symposium, Hvar 2024 10th International Conference on Acoustic and Radio EeV Neutrino Detection Activities ARENA 2024 9th International Conference on Acoustic and Radio EeV Neutrino Detection Activities ARENA 2022 37th International Cosmic Ray Conference, Berlin, 2021 36th International Cosmic Ray Conference, Madison, 2019 8th International Conference on Acoustic and Radio EeV Neutrino Detection Activities ARENA 2018 35th International Cosmic Ray Conference, Busan, 2017 7th International Conference on Acoustic and Radio EeV Neutrino Detection Activities ARENA 2016 34th International Cosmic Ray Conference, Den Haag, 2015 33rd International Cosmic Ray Conference, Rio de Janeiro, 2013 Radio Detection in Astroparticle Physics 2011 International Cosmic Ray Workshop Aragats-2007