Jacek Jassem, MD, PhD, is a Full Professor of Clinical Oncology and Radiotherapy and the Head of the Department of Oncology and Radiotherapy, Medical University of Gdansk, Poland.

Professor Jassem received his MD degree, and his PhD degree from the Medical University of Gdańsk, Poland. He also trained in oncology at the Karolinska Institute in Stockholm and National Cancer Institute in Amsterdam.

His main scientific interests are lung cancer, breast cancer, combined modality treatment with chemotherapy and radiation as well as molecular oncology. He has (co)authored over 500 full articles, patents, books and book chapters in this field. He has been actively involved in different editorial boards including Lancet Oncology, European Journal of Cancer, Cancer Treatment Reviews, Radiotherapy and Oncology and Journal of Thoracic Oncology. The cumulated impact factor of his full publications is over 1640, with over 13,000 citations and h-index of 44. He is the recipient of several Polish and international scientific awards.

He is the past-chairman of the EORTC Breast Cancer Group and the EORTC Executive Committee, the chairman of the Central and East European Oncology Group, the past chairman of the ASCO International Affairs Committee, and the immediate past-president of the Polish Oncological Society. He is a member of the European Academy of Cancer Sciences and Polish Academy of Art and Sciences. He is an ESMO member and served on the ESMO Executive Board from 2015 - 2016. 

Professor Jassem has contributed to several radio and TV programmes and articles in lay press on the role of science in the development of public health and oncology, and is a co-author of educational films addressing these topics. He undertook nationwide public health initiatives, such as authoring of Polish anti-tobacco legislation (introduced by the Parliament in 2010) and the coordination of Cancer Control Strategy for Poland 2015-2024.