He serves as member of the board of directors of the Italian Sarcoma Group (ISG), member of the Sarcoma Disease Site Working Group of the Society of Surgical Oncology (SSO) 2018-2021, member of the board of directors of the European Society of Surgical Oncology (ESSO) 2020-2022; international representative on the executive council of the Society of Surgical Oncology (SSO) 2021-2023; member of the Sarcoma Task Force of the European Society for Medical Oncology (ESMO). He was chair of the EORTC Soft Tissue and Bone Sarcoma Group (2015-2017), president of the Connective Tissue Oncology Society (2016); president of the Italian Society of Surgical Oncology (2019-2021), international representative on the nominating committee of the Society of Surgical Oncology (2019-2020). He is member of the European Surgical Association (ESA), the American Society of Clinical Oncology (ASCO) and is honorary member of the Polish Society of Surgical Oncology (PSSO). He is one of the initiators of a global collaborative effort on retroperitoneal sarcoma (Trans-atlantic Australasian RetroPeritoneal Sarcoma Working Group, TARPSWG), which involves over 150 institutions worldwide. Dr. Gronchi has authored more than 440 scientific publications (Scopus HIndex 78), serves as Associate Editor of the Journal of Surgical Oncology, Annals of Surgical Oncology, Critical Reviews in Oncology/Hematology, Tumori Journal, Sarcoma Journal.