At the Institute of Space Systems (IRS) of the University of Stuttgart the small satellite "Flying Laptop" is currently being developed by a team of undergraduate students and Ph.D. candidates -supported by industry and research institutions. One of the project goals is to improve the education of students in aerospace engineering at the University of Stuttgart by applying industry standards and using professional tools where possible. As part of the project the complete ground segment had to be established from scratch. Applying the project philosophy, it was decided to use the European Space Agency's SCOS-2000 as the mission control system. This way, compatibility to agency ground data systems is assured and commercial off-the-shelf tools with standardized interfaces to SCOS-2000 can be added as required. In recent years a custom ground segment including additional software was established around the SCOS-2000 application, which is used for both ground tests and in-orbit operations. The additional software developed at the IRS includes a telemetry archiving application, a versatile web front-end for telemetry and payload data access, and a TM/TC routing system. The latter provides the interfaces between the mission control system, the telemetry archive, the ground station baseband equipment or the realtime simulator, the space link extension to external ground stations, as well as other applications made to work with telemetry or telecommand data like support software from device manufacturers. With these tools, a complete ground segment for complex satellite missions was developed and implemented at the IRS at a relatively low development effort and cost.