Håkon Gjessing is a statistician with extensive experience in developing (bio)statistical and mathematical models. He is adjunct professor at the University of Bergen. One of his main research areas is statistical genetics, including classical biometrical modelling, as well as molecular genetics, including GWAS and methylation analyses. He has co-authored a book on statistical models in Event History Analysis, and has contributed extensively to perinatal epidemiology, including the development of the Norwegian national reference curves for ultrasound pregnancy dating and fetal size evaluation, as well as national reference curves for fundal height measurements. Gjessing has also developed the R-package “Haplin” for analysing genetic family triad data. He has (co)authored more than 120 scientific papers, and is currently Editor-in-Chief of the Scandinavian Journal of Statistics.