The Aqueous Geochemistry and Mineralogy group at Washington University in St. Louis, led by Prof. Jeff Catalano, invites applications for a postdoctoral scientist position as part of a collaborative project investigating the accumulation and redistribution of critical elements in the environment. This position will specifically support investigations of the chemical speciation and solubility of rare earth and platinum group elements associated with iron oxide and clay minerals as impacted by complexation with organic and inorganic ligands as well as redox chemistry. The goal for this position is to advance science while enhancing the career development and broadening the expertise of the postdoctoral scientist. To this end, ample opportunities will be provided for training in new approaches and techniques through direct mentorship and interaction with the project team, their research groups, and the broader Washington University community. The postdoctoral scientist will be supported in developing their own research directions in addition to advancing the project goals. Application instructions and further details about the position can be found at: https://aqgeochem.wustl.edu/images/CriticalElements_Postdoc_ad_2023.pdf -- Prof. Jeffrey G. Catalano Director, Environmental Studies Program<https://enst.wustl.edu/> Professor of Aqueous Geochemistry and Mineralogy<http://aqgeochem.wustl.edu/> Executive Editor, Geochimica et Cosmochimica Acta<https://www.sciencedirect.com/journal/geochimica-et-cosmochimica-acta> Department of Earth, Environmental, and Planetary Sciences Washington University 1 Brookings Drive, Campus Box 1169 Saint Louis, MO 63130, USA