Leadership as a key building block of a health system plays a crucial role in achieving high performance and helps deliver change and shape the policy agenda and its implementation. Echoing the emerging need for effective leaders in Oncology, the “Improving Cancer Outcomes and Leadership Course” was developed jointly by the European School of Oncology (ESO), the European Cancer Organization (ECO) and Sharing Progress in Cancer Care (SPCC). The course was offered as a hybrid event online and in Warsaw in June 2022. It aimed to introduce early and mid–career cancer healthcare professionals of all disciplines and professions to the expertise required to develop strategic plans, support and collaborate in relevant applied health research, develop implementation approaches and acquire the skill sets required to support leadership and change management within their countries and regions. (https://www.sciencedirect.com/science/article/abs/pii/S2213538324000511?dgcid=coauthor