Alina Cosma is a researcher with extensive experience in the design and management of cross-sectional health surveys focusing on child and adolescent health and well-being. Alina was awarded a PhD in Psychology in 2015 from Babes Bolyai University, Cluj Napoca, Romania. Since then, she has held post-doctoral positions at prestigious universities in the UK (University of St Andrews), Ireland (RCSI), the Netherlands (Utrecht University) and Czechia (Palacky University Olomouc). From 2011 onwards, Alina has been part of the cross-national survey Health Behaviour in School-aged Children (HBSC) network, where she is currently charring the Early Careers Group and the Mental Health and Wellbeing Focus group. Her previous line of work follows three main streams: time trends and predictors of change over time in adolescent health and mental health (within country and cross-countries), social and structural determinants (at individual and country levels) for adolescent health and health and well-being in vulnerable populations (i.e., sexual minorities and adolescents with an immigration background). She has published as first author and co-author, a wide range of original research articles (close to 40 peer-reviewed publications), briefing papers, national and international reports (including the latest 2018 HBSC International Report), research protocols, fact-sheets and book chapters about child and adolescent health and well-being. During her Marie Skłodowska-Curie Individual Fellowship (Project GenerationZ), she will explore contemporary perspectives on adolescent mental health. More specifically, GenerationZ aims to to i) investigate within-individual changes in mental health as young people progress through adolescence using Growing up in Ireland data and ii) to test cross-national variation and trends in population-level adolescent mental health across 45 European countries using Health Behaviour in School-aged Children (HBSC) data.