After finishing her studies in medicine, sociology, psychology and politics with her Master of Science (Dipl. Soz) in 1997 and MD thesis in 2000, Tanja Krones worked as a medical doctor in internal medicine and as research fellow and project leader on ethics at the University of Marburg. She formed part of the ethics liaison service at the University hospital since 2004 and gave lectures in sociology, medical ethics and internal medicine and public health. She was executive secretary of the research ethics commission (2006-2009), senior lecturer in medical ethics since 2004 and finished her “habilitation” (2nd PhD thesis for gaining full professorship) on a context sensitive bioethics in 2007. She is member of several committees and scientific boards, among these the German central ethics commission of physicians (ZEKO) and the Swiss National Ethics Committee (NEC). Since 1st of August 2009 she is Head physician of clinical ethics/executive secretary of the clinical ethics committee of the University hospital of Zurich at the Institute of Biomedical Ethics, University of Zurich.