Accurate knowledge of the electronic states is at the core of understanding and designing materials.To achieve this goal, MedeA with its fully integrated leading computational program VASP offers unique capabilities. In this webinar, we will demonstrate the construction of complex systems such as interfaces in semiconductor gate stacks, the calculation of accurate energy band structures, Schottky barriers, and effective work functions. As a comprehensive modeling environment, MedeA includes as integral components structural databases and phase diagrams as starting point for the construction of atomistic models as well as a variety of tools for analyzing the calculated results. Together with a suite of other atomistic modeling tools, MedeA addresses the full range from band structures to the multitude of properties of electronic materials.