Dear Colleagues, The Space Physics and Astronomy Research Unit (https://www.oulu.fi/en/university/faculties-and-units/faculty-science/space…) at the University of Oulu, Finland, invites applications for a Postdoctoral Researcher position. The successful candidate will work in the project "Ion-neutral interactions in arctic upper atmosphere observed with EISCAT3D (IONTRACE)" to develop novel incoherent scatter radar measurement and data analysis techniques, and to use them for observing ion-neutral interactions in the high-latitude ionosphere-thermosphere system. The position is fixed-term until 31 August 2029, starting 01 September 2025 or as soon as possible thereafter. The application deadline is 03 August 2025. The full call text and application instructions are available at: https://oulunyliopisto.varbi.com/what:job/jobID:837110/ Requirements: PhD in Space Physics or a closely related field. Good programming skills are necessary. Experience in studies of the ionosphere-thermosphere system, incoherent scatter radars, and auroral electrodynamics are considered benefits. More information: Project PI Dr. Ilkka Virtanen, ilkka.i.virtanen@oulu.fi<mailto:ilkka.i.virtanen@oulu.fi>