SITC held the first-of-its-kind Immuno-Engineering Workshop, which was designed as a problem-based think tank. Leaders from the IO community presented a hurdle or issue in the field and leaders from the engineering field shared potential solutions or tools to address that hurdle. The think tank explored a range of opportunities for engineering solutions to immunotherapy challenges, such as monitoring changes in the tumor/host interaction, better approaches to control immune targeting, function, regulation, and orchestration of signals, as well as technologies for understanding the tumor/host as a complex system. The SITC Board of Directors used the think tank as the foundation for the 2024 Annual Meeting Workshop, which will focus on immuno-engineering with both invited faculty as well as dedicated abstracts.