Sarah Thomis finished training as a general and vascular surgeon at University of Leuven in 2011. She followed additional training in the Netherlands and US. She is specialized in phlebological and lymphological diseases and is responsible physician of the Center for lymphedema of the University Hospitals Leuven. Besides clinical activities, she is active as a researcher and has authored numerous publications.
She is a member of organizations such as European Venous Forum, Belgian Society of Vascular Surgery, European society of Lymphology and BeLymph. She is on the advisory board of the International Compression Club and is the treasurer of the Benelux Society of Phlebology.