The document summarizes a student project to design a Quantum Communication Satellite (QCS) that would deliver encrypted quantum communication keys between two ground stations using a satellite constellation. The project involved designing all subsystems of the satellite bus and associated mission segments. An initial design was a 33 kg microsatellite, but after review, the team redesigned a smaller 22 kg CubeSat configuration adhering to requirements. The final design included an 80 satellite constellation organized in 8 orbital planes, optimized deployment and maintenance maneuvers, and complete subsystem designs within the CubeSat specifications.