Marija Jelusic, MD, MSc,PhD, is Full Professor of Paediatrics at the University of Zagreb, School of Medicine, Croatia, Head of the Department of Paediatric Rheumatology, Immunology and Allergology, University Hospital Centre (UHC) Zagreb, at the University of Zagreb, School of Medicine and the Head of the Referral Centre for Paediatric and Adolescent Rheumatology Ministry of Health Republic of Croatia - full member of the European Reference Networks – Immunodeficiency, Autoinflammatory and Autoimmune disease (ERN-RITA). She is the Pediatric Rheumatology European Society (PReS) Council member – Chair (elect) of the Training and Education committee (since 2022), the current Chair (since 2017) and past Secretary (2013-2017) of the Vasculitis Working Party of the PReS, National co-ordinator of the Paediatric Rheumatology International Trail Organization (PRINTO) (since 2017), past Secretary of the Macrophage activation syndrome Working Party of the PReS (2014-2018), and National co-ordinator of the EULAR (European League Against Rheumatism) Standing Committee for Paediatric Rheumatology. (2013-2016).