Tomislav Omrčen graduated from the School of Medicine of the University of Zagreb in 1994. In 2004, he completed his specialization in oncology and radiotherapy. He defended his doctoral dissertation focusing on metastatic colorectal cancer in 2011. Since 2004, he has been working as a clinical oncologist at the Department of Oncology and Radiotherapy of the University Hospital Center in Split. Since 2005, he has been working as a lecturer in the undergraduate program at the Department of Clinical Oncology of the School of Medicine, University of Split. He is a regular and active participant at national and international congresses. He publishes in national as well as international professional journals. He is a member of the Croatian Society of Oncology and the American Society of Oncology. His main areas of interest are urologic oncology, gastrointestinal oncology and central nervous system oncology.