The aeronautical industry is in a new era of growth thanks to numerous technological advances. One of them is the UAS; Unmanned Aircraft Systems are able to fly by themselves with autonomous operation capabilities. UAS can advantage manned aircrafts in the so called D-cube applications: Dull, Dirty or Dangerous. Risks and costs can be minimized using UAS since they need no crew and their construction, operation and maintenance costs are comparatively lower. This Master Thesis has been developed in the ICARUS (Intelligent Communications and Avionics for Robust Unmanned aerial Systems) research group, which is developing a new platform with UAS technology for civil use. It is true that this type of technology is already used in the military field for years, but it is now in the civil use where it can be expanded even more. Under this scenario, a certain level of control and monitoring is required from the ground segment so that the pilot in command (PiC) is able to supervise the VAS operations. Therefore, it is needed an application in order to solve all pilot in command necessities. A real UAS flight has many different specific phases, for each one of the phases is needed a specific information to shown. This application has to control the UAS, the flight plans and will receive all the information that generates the UAS payload. This Master Thesis solves some of the objectives of the ICARUS research group. One of the main parts of the project is the design and implementation of two applications for the Ground Control Station (GCS). In the GCS we need different workstations, each one for flight plan modifications. In GCS we need three different workstations, each one for different purpose. The first one is the workstation for the PiC to flight control (called Flight Monitor Service). The second one is the workstation for the PoC to manage the flight plan modifications (called Flight Plan Monitor Service) and the las one is for mission and payload management. This project is focused in the design and development of the first two workstation.