The Space Generation Advisory Council (SGAC) in support of the United Nations Programme on Space Applications is a global non-governmental, non-profit organization and network which aims to represent university students and young space professionals ages 18-35 to the United Nations, space agencies, industry, and academia. The organisation was created in 1999 at the United Nations Conference on Exploration and Peaceful Uses of Outer Space (UNISPACE III), and its members include university students and young professionals with very diverse educational and professional backgrounds, collaborating together on various projects and activities. This chapter provides a detailed description of the organization, including its mandate and scope. In particular, it outlines the benefits and importance of cross-sectorial and multi-disciplinary cooperation in the space sector, and beyond.