Constellation Services International (CSI) was an entrepreneurial orbital human spaceflight services company. Founded in 2000 and based in Woodland Hills, California, CSI focused on cargo resupply to low Earth orbit (LEO) and satellite retrieval and repair. The company appears to have ceased operations.
All verified mentions of this organization in source documents.
Constellation Services International proposed circumlunar missions using Soyuz spacecraft in 2004 but disbanded without making progress.