Prof. Dr J.J. Sandra Kooij is a psychiatrist and researcher in the field of adult ADHD. She is a professor on adult ADHD at Amsterdam University Medical Center, location VUMc in Amsterdam, and head of the Expertise Center Adult ADHD at PsyQ in The Hague, The Netherlands. Sandra Kooij started as a psychiatrist in 1995 with the development of diagnostic assessment, treatment and research in the field of adult ADHD. In 2006 she received her PhD on a thesis entitled ‘ADHD in adults. Clinical studies on Assessment and Treatment’. Since 2020 she is a professor on adult ADHD. She is involved in research, webinars and podcasts, treating patients, training professionals, informing the public, developing the Super Brains app for ADHD, and publishing articles.