Professor Zielinski is Director of the Central European Cancer Center at Wiener Privatklinik, Vienna, Austria, where he also serves as Medical Director. He is also  President of the Central European Cooperative Oncology Group (www.cecog.org) which is conducting clinical trials and major educational activities via its Academy in 23 countries of Central and Southeastern Europe.

Professor Zielinski completed his medical training at the University Hospital Vienna and began his career with a position as a research fellow at the Cancer Research Center at Tufts University, Boston, USA. From 2004 to 2017 he was chairman of the Department of Medicine I and its Clinical Division of Oncology and from 2010 to 2018 Director of the Comprehensive Cancer Center of the Medical University Vienna – General Hospital. From 2018 to 2020, he was Founding Director of the Vienna Cancer Center which coordinates cancer care and clinical trials within the City of Vienna. Prof. Zielinski’s recent clinical research activities cover a wide range of cancer therapies, with particular focus on clinical trials, breast and lung cancer research including the development of concepts related to immune-oncology, targeted drugs and cancer-related thromboembolism. He has published ca. 600 original papers and reviews in peer-review journals and many books.

His h-Index is 72 and the citations of papers authored by him exceed 23.000.

Prof Zielinski is Editor in Chief of the peer review open-access internet journal “ESMO Open – Cancer Horizons” which is one of three scientific journals of the European Society for Medical Oncology, and – in this position - is member of the ESMO Council. He is also a member of the ESMO Leadership Generation Task Force.

In 2013, Professor Zielinski received a “Dr. h.c.” degree from Titu Maiorescu University in Bucharest.

Professor Zielinski is a member of the European Society for Medical Oncology (ESMO) where he served on the Executive Board and as Chair of the Fellowships and Awards Committee from 2014-2017. He was Local Officer of the ESMO Annual Meeting 2012 and the ECC Meeting 2015.

Prof. Zielinski is an Honorary Member of the Polish Society for Clinical Oncology and also member of the Austrian Society for Hematology and Oncology, the American Society of Clinical Oncology (ASCO), the American Association for Cancer Research (AACR) and the Chinese Society for Clinical Oncology (CSCO).