Dear Colleagues, Please find in attachement the announcement for a two-years post doc position in France (Saint-Etienne). This post doc is part of a wider project /COSMO-SAT/ (P.I. A.-M. Seydoux-Guillaume, Co-P.I. F. Vurpillot and M. Roskosz) from the PEPR Origins (https://pepr-origins.fr/en/). The objective of /COSMO-SAT/ is to develop a new generation of tomographic atom probe dedicated to the analysis of terrestrial and extraterrestrial geological samples in order to significantly improve their quantitative and isotopic measurements at the nanometric scale. The project has several ambitious instrumental improvement objectives (https://pepr-origins.fr/en/projet/cosmo-sat/) to tackle various questions. One concerns extraterrestrial nano-geochronology and the understanding of complex samples from the Archean to the Hadean through isotopic analysis of very small volumes of chronometric minerals (zircons, baddeleyites, phosphates, etc.), and the study of processes at the nanoscale. This will be at the centre of the present Post doc (more details in the file attached). *Application:* Interested candidates should send a short CV *before July 15th, 2026* (including the list of articles/communications) + a letter of motivation + at least one letter of recommendation, by email to anne.magali.seydoux@univ-st-etienne.fr /_Starting date_/: *November 2026 (flexible over a few months)*. Participation in the atom probe school in Rouen (early November 2026) is mandatory. Best regards, Anne-Magali -- Anne-Magali Seydoux-Guillaume Directrice de recherche au CNRS Laboratoire de Géologie de Lyon : Terre, Planète, Environnement UMR5276 (CNRS, UCBL1, ENSLyon, UJM Saint-Etienne) Université Jean Monnet (UJM), Faculté des Sciences et Techniques Campus Manufacture Bâtiment M "Les Forges 2" - Bureau M333 20 rue Dr Rémy Annino 42000 SAINT-ETIENNE Email:anne.magali.seydoux@univ-st-etienne.fr tel: 33(0)477481527 https://lgltpe.fr/annuaire/seydoux-guillaume-anne-magali/ "...Toujours Paris s’écrie et gronde. Nul ne sait, question profonde, ce que perdrait le bruit du monde le jour où Paris se tairait!" V. Hugo, Les voix intérieures