Interdisciplinary PhD position (65%) (f/m/x) The Rhine Floodplain – a Biogeochemically Coupled System under Stress

We are one of the largest and oldest universities in Europe and one of the most important employers in our region. Our broad range of subjects, the dynamic development of our main research areas and our central location in Cologne make us attractive for students and researchers from around the world. We offer a wide range of career opportunities in science, technology, and administration. Floodplains are dynamic, valuable ecosystems increasingly threate- ned by river regulation, land use, and climate change. The University of Cologne’s project “The Rhine Floodplain – a Biogeochemically Coupled System under Stress” investigates how altered hydrology affects sediment dynamics, biodiversity, food webs, microbial pro- cesses, and greenhouse gas emissions. **YOUR TASKS** **»** Characterise floodplain sediments using sedimentological and geochemical techniques **»** Determine deposition ages and sedimentation rates using lumi- nescence dating and fallout radionuclides **»** Quantify microplastics and heavy metals in floodplain sediments **»** Quantify bioturbation using luminescence-based methods, earthworm surveys and laboratory experiments **»** Collaborate in joint field campaigns with an interdisciplinary team **YOUR PROFILE** **»** MSc in geography, geosciences, soil science, biology or a rela- ted field **»** Experience in laboratory work and the analysis of complex data- sets **»** Ability and willingness to undertake fieldwork, including exten- ded stays at the Ecological Research Station Rees **»** Experience in sedimentological or geochemical analysis, lumi- nescence dating or microplastic analysis is desirable **»** Excellent communication skills in English (C1 equivalent) **»** Proficiency in German is desirable **WE OFFER** **»** Exciting research in an interdisciplinary project with 2 other PhD students and a postdoc **»** A diverse working environment with equal opportunities **»** Support in balancing work and family life **»** Flexible working time models **»** Extensive advanced training opportunities **»** Occupational health management offers The University of Cologne promotes equal opportunities and diversity. Women will be considered preferentially in accordance with the Equal Opportunities Act of North Rhine-Westphalia (Landesgleichstellungsgesetz – LGG NRW). We also expressly wel- come applications from all suitable candidates regardless of their gender, nationality, ethnic and social origin, religion, disability, age, sexual orientation and identity. The position is available from 1 February 2027 on a part time basis with 25,89 hours per week. The position is to be filled for a fixed term until 31 January 2030. If the applicant meets the relevant wage requirements and has the appropriate personal qualifica- tions, the salary is based on remuneration group 13 TV-L of the pay scale for the German public sector. Please apply online with proof of the re