Professor Gruenberger received his medical degree in 1991 at the University of Vienna. He underwent his surgical training at the University Hospital Vienna and different general surgical Departments in Austria. After he received his surgical license in general and transplant surgery Prof. Gruenberger specialized in HPB Surgery and underwent a fellowship at the University of New South Wales, Sydney, Australia, where he held the position of a Senior Lecturer in General Surgery and Vice-Chair of the Liver Unit, St. George Hospital. Currently he is Chair of the HPB center of the health network Vienna and heads the surgical Department of the Clinic Favoriten. He additionally holds the Chair of HPB-Surgery at the Sigmund Freud University, Vienna. Professor Gruenberger has published more than 150 peer-reviewed articles and more than 150 other texts or chapters in books on gastrointestinal cancer and hepatobiliary tumors. His work has appeared in respected journals such as the Lancet, Lancet Oncology, Journal of Clinical Oncology, Annals of Oncology, European Journal of Cancer, British Journal of Cancer, Cancer, Clinical Cancer Research, European Journal of Surgical Oncology, Annals of Surgery, British Journal of Surgery, Journal of Hepatology and Hepatology. He is Editor of a book on the treatment of liver metastases and Co-Editor of a book on Surgical Oncology.

Professor Gruenberger is a member of several international academic societies with specific oncological interest, including the International- and the European-African- Hepato-Pancreato-Biliary Association (IHPBA, E-AHPBA), the European Society of Surgical Oncology (ESSO), the American Society of Clinical Oncology (ASCO), European Society for Medical Oncology (ESMO), the European Organisation for Research and Treatment of Cancer (EORTC) and many national organizations including the Austrian Society of Surgical Oncology (ASSO). Professor Gruenberger is past President of the Austrian Society of Surgical Oncology, he serves as the National Delegate of the Division of HPB Surgery in the UEMS Section of Surgery and is a board member of the European Society of Digestive Oncology (ESDO). He is an ESMO Officer, a member of the ESMO Gastrointestinal Cancer, Lower digestive Faculty group and a Scientific Committee Member of the ESMO Congress 2023. He is Associate Editor of the Annals of Surgical Oncology and Advisory Board Member of the European Journal of Surgical Oncology. He is a scientific reviewer of numerous surgical, oncological and basic science journals.