I am the leader of the Big Data Analytics team at GESIS - Leibniz Institute for the Social Sciences in Cologne, Germany. Before that I have been a Post-Doc and researcher at the Bauhaus-Universität Weimar (I defended my dissertation in 2022).

My main areas of interest are argument search, conversational search, human values, and web archives. I have been the co-organizing the SemEval/PAN 2019 Task for Hyperpartisan News Detection (2019), the SemEval/Touché Task on Human Value Detection (2023, 2024), the SCAI-QReCC conversational question answering task (2021), the Touché Tasks on Image Retrieval for Arguments (2022, 2023, 2024, 2025) and Retrieval-Augmented Debating (2025), and the TREC Interactive Knowledge Assistance Track (iKAT; 2025). I have been co-organizing the workshops SCAI (2024) and Touché (2022, 2023, 2024, 2025).

At Bauhaus-Universität Weimar, I have taught the course Introduction to Machine Learning in 2024. Moreover, I have been repeatedly teaching assistant for the lectures Search Algorithms (2014), Databases (2015, 2016, 2017, 2018), Introduction to Machine Learning (2022, 2023), and Web Technology (foundations: 2016, 2017, 2018, 2019). I mentored several student theses and supervised student projects on "Big Data and Cryptography" (2014), "Linking Discussions", "Advanced Web Search Methods" (2015), "Search by Voice", "Interactive Argument Search" (2017), "Large-scale Web Archiving and Analysis", "Voice-based Argument Search" (2018), "Conversational News", "Arguments from Email Data" (2019), "Conversational Argument Search", "Conversational Argument Search II" (2020), "Knowledge and Argument Graphs in Voice Search", "In Dialog with the Virtual Museum" (2021), "In Dialog with the Virtual Museum II", "Automatic Image Captioning", "So Tell Me Why - Investigating Personalized Argument Search" (2022), "Mining Arguments from Podcasts", "Multimodal Sequence Representations for Feed Data", "AI-Assisted Argumentative Writing", "Infobot: Let’s Talk to the Lecture Slides" (2023), and "Futuring Machines" (2024) student projects.

I have been a PI of the project Futuring Machines (BUW, 2024).

I have been full paper chair for CUI 2024 and am Proceedings chair for ECIR 2026. I have served on the program committees or as reviewer for the Web Conference alternate track on Journalism, Misinformation, and Fact Checking (2018), ARR (2024, 2025), ArgMining (2021, 2023, 2025), CAIR (2020), CHI (2019, 2023), CHIIR (2024), CIKM (2020, 2021, 2022), CLEF (2014, 2016, 2025), CLEF Labs (2022, 2023, 2024, 2025), COLING-LREC (2024), CUI (2022, 2024), DBSpektrum (2015), EACL (2017), ECIR (2018, 2020, 2023, 2024), EMNLP (2016), HCOMP (2018), HT (2020), IJCAI (2023), KDML-LWDA (2016), NAACL (2016), PAN (2019), SemEval (2019), SIGIR (2016, 2021, 2023, 2024, 2025), Springer World Wide Web (2024, 2025), TOIS (2020, 2022, 2023), Touché (2022, 2023, 2024), TPDL (2022, 2023, 2024, 2025), and WIR-LWDA (2016).

I'm a junior member of the SIGIR Artifact Evaluation Committee (since 2021).

I'm a member of the parent's council of the Kindergarten associated with Bauhaus-Universität Weimar (2019-2025).