The AMP-AD Knowledge Portal provides data, analysis results, and tools to support research into new therapies for Alzheimer's Disease. Over 260 researchers have contributed to the data available in the portal, which ranges in type from genomic to behavioral, and includes over 5800 individuals. This talk will present the portal's development as a case study in collaborative research and development among scientists, data curators, engineers, designers, governance experts, users, and many others. We will present on the portal's evolution, and discuss how our approach to collaboration and data curation has evolved to support the Alzheimer's disease research community.