The International Institute for Astronautical Sciences (IIAS) is a citizen-science, research, and education institute specialising in operational space science, human factors, flight test engineering, aeronomy, bioastronautics, atmospheric science, planetary geology, and research spaceflight. With students from 46 different countries, IIAS offers professional certifications and sponsors educational outreach programs. IIAS science and research campaigns produce peer-reviewed scientific publications, deployable space technologies, and inspire the next generation of international space professionals.