Born on 30 September, 1971. Studied at the Faculty of Medicine of the Medical University of Silesia in Katowice in the years 1990 – 1996. Assistant Lecturer at the Department of Haematology and Bone Marrow Transplantation of the Medical University of Silesia in the years 1996-2008. Head of the Haematology Department of SPZOZ Municipal Hospital Complex in Chorzów since 2009. Professionally involved with the Department of the Basic Medical Sciences, Faculty of Public Health, Medical University of Silesia in Katowice since October 2014. Head of the Department of Cancer Prevention, Faculty of Public Health, Medical University of Silesia in Katowice since February 2015. Active member of the Polish Adult Leukaemia Group (PALG), the Polish Society of Haematologists and Transfusionists (PTHiT), the Polish Society of Internal Medicine (TIP), the Polish Association of Physicians (PTL), and the American Society of Haematology (ASH). He obtained the second-degree specialization in internal medicine in 2003, and the second-degree specialization in haematology in April 2007.
Author of 39 full-text titles with the total impact factor of around 200 (excluding conference reports), and of roughly 100 research reports delivered at conferences in Poland and internationally. Key professional interests of doctor Sebastian Grosicki include therapy optimization and prognostic factors in acute myeloid leukaemia, as well as optimum treatment patterns in multiple myeloma, chronic lymphocytic leukaemia, and non-Hodgkin lymphomas.