Aleksandras Vilionskis was trained at Kaunas Medical Academy (now - Lithuanian University of Health Sciences), Faculty of Medicine. He completed the residency in Neurology in 2001 and started his professional activity in Republican Vilnius University hospital as neurologist and his current position is Head of Stroke Center at Republican Vilnius University hospital. In 2015 he published his PhD thesis "Predicting Outcome of Intravenous Thrombolysis for Acute Ischemic Stroke". Since 2015 Aleksandras Vilionskis works in Vilnius University, Clinic of Neurology and Neurosurgery and currently has position of Associate Professor of Neurology. His research interest is reperfusion treatment in acute ischemic stroke and secondary prevention of cardioembolic stroke. Aleksandras Vilionskis is member of board of Lithuanian Stroke Association, ESO fellow member, member of Lithuanian Neurology association and member of World Stroke Organization. He is Lithuanian Representative in ESO EAST project, national coordinator of SITS register. Since 2018 he is member of board of Lithuanian Ethics Committee.