Jan Geissler is the founder and CEO of Patvocates, a leading think tank on patient advocacy and patient engagement in research. He was the Director of the European Patients Academy (EUPATI) from 2012-2017 and still leads the German EUPATI platform. Jan is a work package leader of the IMI2-funded EU project HARMONY on big data for better outcomes in hematology. Being a leukemia survivor since 2001, Jan co-founded the patient organisations LeukaNET, the European Cancer Patient Coalition, the CML Advocates Network, the Leukemia Patient Advocates Foundation, WECAN and the Acute Leukemia Advocates Network. Jan represents patients on a number of advisory boards and committees, e.g. European Cancer Organisation, EHA, ISPOR, Berlin Institute of Health, EuroBloodNET, International CML Foundation, the EU Cancer Mission Assembly, the German National Decade Against Cancer and the Ethics Committee of the Bavarian Chamber of Physicians. He is also a member of the Editorial Board of two medical journals.