Postdoctoral Researcher

**Universität Bremen - MARUM (Zentrum für Marine Umweltwissenschaften)**: The University of Bremen, MARUM - Center for Marine Environmental Sciences - is offering a fixed-term position for a **Postdoctoral Researcher (f/m/d)** **Salary Scale 13 TV-L** from 1 October 2025 at the earliest for a period of 45 months, until 30 June 2029 at the latest (according to - 2 WissZeitVG) within the Collaborative Research Centre “CONCENTRATE”. The position is to be filled with 100% of the regular weekly working hours (39.2 hours/week). **Berufsgruppe** Wissenschaft und Forschung **Eingruppierung** EG 13 TV-L **Besetzbar** zum 01.10.2025 **Bereich** The aim of CONCENTRATE is to decipher the molecular and microbial processes that lead to the stabilization of glycans in the ocean. In an interdisciplinary approach, the research team combines laboratory experiments with measurements in natural marine habitats. The focus is on the interactions between algae, bacteria, fungi, their glycans and proteins - down to atomic resolution. The elucidation of these microbial and biochemical mechanisms will contribute to a better understanding of carbon fluxes in the oceans. **Aufgabengebiet** Within the CRC CONCENTRATE you will work on subproject C03 under the direction of Prof. Jan-Hendrik Hehemann, Carbon Sequestration and Glycobiochemistry. By providing precise glycan measurements, this project supports the CRC’s goal of understanding why some glycans resist microbial degradation and contribute to carbon sequestration. You will develop, provide and assist with technologies for structure specific glycan analysis in complex communities using, among others, biocatalytic assays, anion exchange chromatography, glycan microarrays, antibodies, and liquid chromatography mass spectrometry. Your project is linked to many other microbiological and biochemical subprojects of the CRC and you will be part of an interdisciplinary network. You will have the opportunity to work on your PhD in a small research group and will be supported by the University's PhD programs. You will also be able to collaborate with national and international research partners. **Your responsibilities**: - Optimization of enzyme cascades for the structural and quantitative analyses of diverse glycans - Mono - and oligosaccharide analysis of enzymatically digested glycans by diverse methods, including fluorophore-assisted carbohydrate electrophoresis, high-performance liquid chromatography mass spectrometry, nuclear magnetic resonance spectroscopy, reducing sugar assays, monoclonal antibodies and high-performance anion-exchange chromatography with pulsed amperometric detection - Purification of glycans, such as sulphated mannan and fucan, from laboratory cultures by anion exchange chromatography - Sampling of glycans from microbiome experiments by filtration or anion exchange chromatography - Discovery of enzymes for degradation of diatom fucan - Acquisition, analysis and presentation of scientific data - Supervision of technicians and students - Publication of the results in international journals - The position offers the opportunity for academic qualification **Voraussetzungen** - Solid knowledge in chromatography, enzymology, and glycan analytics - A strong background in microbiology is advantageous - Excellent written and spoken English **Desirable**: - Great basic research interest in marine glycobiochemistry - High motivation and ability to work actively in an interdisciplinary research and education environment - Independent working style, team spirit, helpfulness and reliability **Kennzeichen** A201-25 **Bewerbungsfrist** 15.08.2025 **Befristet** 45 Monate, längstens bis 30.06.2029 **Allgemeine Hinweise** **We offer** - Annual special payment ("Christmas bonus"), regular collectively agreed salary increases and additional public service pension scheme (VBL) - A crisis-proof, interesting and varied job in a cosmopolitan university - 30 days holiday per calendar year - A diverse, future-orientated and open corporate culture - Support from a collegial, motivated team with a positive working atmosphere - Individual induction training - The opportunity for further education and training - Free social and family counselling services - Active company health management, including the option of discounts at local sports clubs, gyms and swimming pools (EGYM WELLPASS) - The option of using a job ticket for public transportation - Numerous sports and cultural activities - Varied catering options in the student union canteens Today, around 23,000 people learn, teach, research, and work on our international campus. In research and teaching, administration and operations, we are strongly committed to the goals of sustainability, climate justice, and climate neutrality. Our Bremen spirit is expressed in the courage to try new things, in supportive cooperation, in respect and appreciation for each other. With our study and research profile and as part of