Vincent Moseti (ZEF LAND) successfully defended his doctoral thesis on "Road infrastructure development in Kenya: Political incentives, economic responses and environmental impacts". His doctoral degree was granted by the Faculty of Agriculture, Nutrition, and Engineering of the University of Bonn. His doctoral research was supervised by Prof. Dr. Lisa Biber-Freudenberger and Prof. Dr. Jan Boerner. 

ZEF researcher Abdul Haseeb Azizi (ZEF ECOL) obtained his doctoral degree (Dr.-Ing) for his doctoral thesis on "Water and Snow Storage Dynamics in Afghanistan: Coupling Ground Observations, Remote Sensing, Machine Learning, and Hydrological Modeling". His degree was granted by the Faculty of Agriculture, Nutritional Sciences and Engineering University of Bonn, Germany.  Supervision and tutoring Abdul Haseeb's primary supervisor was Prof. Dr.-Ing. Jürgen Kusche (University of Bonn), his co-supervisor was Prof. Dr. Christian Borgemeister (ZEF, University of Bonn). His tutors were Dr.-Ing. Bernhard Tischbein (ZEF, University of Bonn) and Dr.-Ing. Fazlullah Akhtar (ZEF, University of Bonn), who also gave scientific guidance and support throughout the PhD journey.

Sara Velander (ZEF LAND) defended her doctoral thesis on “Science-Policy Interfaces Navigating Complex Governance Systems: Institutional Collaboration and Knowledge Uptake for Coherent and Sustainable Land Use” Her degree was granted by FB  06 - the Faculty of Education and Social Sciences / University of Münster under the supervision of Prof. Dr. Thomas Dietz (Primary supervisor, IfPol, University of Münster) and Prof. Dr. Christian Borgemeister (Secondary supervisor, Director at ZEF).

Tamegnon Hospice Tossou (ZEF ECOL) successfully defended his thesis on "Endophytic fungus (Beauveria bassiana) for the control of Fall Armyworm (Spodoptera frugiperda) attacking maize in Benin, West Africa". His degree was granted by the University of Bonn's Faculty of Agricultural, Nutritional and Engineering Sciences. His supervisor was Prof. Dr. Christian Borgemeister and his tutor Dr. Jan Henning Sommer.

Albert Allan Dakyie successfully defended his doctoral thesis on “Cross-border Education and its relationship to sociocultural integration and economic development in West African border communities”. His supervisor was Prof. Dr. Eva Youkhana (ZEF CPC)

Anna Brückner defended her doctoral thesis titled 'Blue health’ for healthy aging? Urban blue spaces as potentially therapeutic landscapes for older people in Ahmedabad and Ruhr Metropolis'.  Her first supervisor was Prof. Dr. Thomas Kistemann, University hospital Bonn and her second supervisor: Prof. Dr. Mariele Evers, Department of Geography, University of Bonn. Anna's tutor was PD Dr. Timo Falkenberg, University hospital Bonn.  

Christopher Tobe Okolo defended his doctoral thesis on Identification, Virulence and Ecological Characterization of Indigenous Entomopathogenic Nematodes as Biological Control Agents Against Fall Armyworm (Spodoptera frugiperda) in Nigeria. His doctoral degree was granted by the Faculty of Agricultural, Nutritional and Engineering Sciences, University of Bonn His First Supervisor was Prof. Dr Christian Borgemeister, his Second Supervisor was Prof. Dr Florian Grundler (support with lab facilities at Molecular Phytomedicine MPM- INRES), whereas Prof. Dr. Joachim von Braun chaired his examination committee and Prof. Dr. Lisa Biber-Freudenberger was an Expert member of the Examination committee. 

Mayra Alejandra Martin Espinosa defended her thesis on “Online communication and mobilization throughout the COVID-19 pandemic: The case of the Colombian non-governmental sector and their target populations in shaping transformative action”. Her doctoral degree was granted by the Faculty of Arts at the University of Bonn. Her Supervisor and First Reviewer was Prof. Dr. Eva Youkhana. Members of the Examination Committee were: Prof. Dr. Kristina Großmann (Head), Prof. Dr. Anna Katharina-Hornidge (Second Reviewer) and Prof. Dr. Gesa Birnkraut (External Member).