- Oxford University, visiting Ph.D. student, 1991-1992
- Central Research Institute of Chemistry of the Hungarian Academy of Sciences, Ph. D. student,
1992-1996
- Universitá degli Studi di Trento, postdoc, 1996-1997
- Mount Sinai School of Medicine, New York, USA, postdoc, 1997-2000
- Budapest University of Science and Technology, Department of Chemical Informatics, invited
researcher, 2000-2001
- Eötvös Loránd University, Institute of Chemistry, research scolar, 2001-2010
- Budapest University of Science and Technology, Department of General and Analytical Chemistry,
assistant professor, 2008-2009
- MTA-BME Research Group of Technical Analytical Chemistry, research professor, 2008-2017
- Eszterházy Károly College, Department of Chemistry, associate professor, 2009-2010
- Eszterházy Károly College, Department of Chemistry, full professor, 2010-2016
- Eötvös Loránd University, Institute of Chemistry, honorary professor 2012-
- Budapest University of Science and Technology, Department of Inorganic and Analytical
Chemistry, honorary professor 2017-
- Eszterházy Károly University, Institute of Food Sciences, Department of Chemistry, director,
full professor, 2016-