Marleen is a public health epidemiologist who worked with Médecins Sans Frontières between 1986 and 1994.
She joined the Institute of Tropical Medicine in Antwerp, Belgium in 1994 where she is currently Full Professor. Her research concentrates on control of tropical infectious diseases, mainly leishmaniasis and sleeping sickness. She evaluated a.o. the clinical benefit of rapid diagnostics for kala-azar treatment and the efficacy of impregnated bednets for kala-azar control. She lectures epidemiology and biostatistics in various courses of ITM and was director of the MPH in Disease Control between 1998 and 2010.
She was Head of the Department of Public Health from 2011 till 2015.
She coordinates two programs for institutional collaboration, one in the Democratic Republic of Congo, and one in Nepal.