The International Space Science Institute (ISSI) in Bern, Switzerland, invites applications for a Post-Doctoral Fellowship in the space sciences, including Astrophysics & Cosmology, Heliophysics and Plasma, and Planetary Sciences for a two-year period, ideally starting in January 2025, to be negotiated. The successful candidate should have received a Ph.D. within the last five year in the fields related to the space sciences of Astrophysics & Cosmology, Heliophysics and Plasma, and Planetary Sciences.