2005:  Field work: Biogeography, ecology and behaviour of the Pachycondyla analis-group (Formicidae, Ponerinae).

2004:  Field work: Biogeography, ecology and behaviour of the Pachycondyla analis-group (Formicidae, Ponerinae).

1995: Field work for diploma thesis at the Institute of Ecology, University of Marburg: Heteroptera of the Jebel Marra Massif, Darfur, Sudan; advisor: Prof. Dr. R. Remane, Institute of Zoology.

2002: Field work in the Comoé national Park at the field station of the Department of Animal Ecology and Tropical Biology, University of Würzburg. PhD-Project: Biogeography, ecology and behaviour of the Pachycondyla analis-group (Formicidae, Ponerinae) funded by the DFG-graduate program “Grundlagen des Arthropodenverhaltens: Genetik, Neurobiologie, Ökologie“.

1997: Tai Forest Ebola Project, Tai National Park, Côte d’Ivoire: As temporary advisor of the WHO research on the possible role of arthropods as reservoir of the ebola-virus in mission of the Institute of Virology (Prof. Dr. W. Slenczka, University of Marburg).

2005: Field work: Biogeography, ecology and behaviour of the Pachycondyla analis-group (Formicidae, Ponerinae).

2005: Field work: Biogeography, ecology and behaviour of the Pachycondyla analis-group (Formicidae, Ponerinae).

1998: DFG-project: Ecology of the wood-borne beetles of the Oitagh-valley in the Kunlun-mountains, Xinjiang, People's Republic of China.