Csilla BÉLAVÁRI has been the coordinating the QualcoDuna proficiency testing program and various interlaboratory comparison projects for over two decades. She obtained and MSc and PhD in analytical chemistry from Eotvos Lorand University as well as an MSc in Environmental Assessment from the University of Norwich. She has been active in the field of environmental and water proficiency testing since 2004. Csilla is a member of the Technical Committee „Calibration and Proficiency Testing” of the National Accreditation Authority in Hungary and the Eurachem Proficiency Testing Working Group and now works as a consultant.