Professor, Ovidius University, Constanta (2005-present). http://snsa.univ-ovidius.ro/
Courses: Ecosystems – structure and functions, Biogeography, Environmental Data Management, Biodiversity: resources and management, Biodiversity Conservation, Ecosystem diversity, Scientific writing.

Visiting Professor, Central European University, Department of Environmental Sciences and Policy (1998-present) http://envsci.ceu.edu/
Courses: Marine Systems, Water Resources, Sustainable water management.

Investigador Prometeo, Universidad Nacional de Loja (2016)
Course: Técnicas Cuantitativas para el Monitoreo de la Biodiversidad

Associate Professor, Bucharest University, Faculty of Biology, Department of Ecology (1990-2005).
Courses: General Ecology, Biodiversity Conservation, Management of Natural Capital, Management of Biological Diversity.

Visiting Professor, Technical University Eberswalde, International Forestry and Ecosystem Management (two semesters during 2001-2003) http://www.hnee.de/en/Programmes/Bachelor-degree/International-Forest-Ecosystem-Management//International-Forest-Ecosystem-Management-B.Sc.-E3582.htm
Courses: Biodiversity, Nature Conservation, Limnology.

---