The structure of Faculty of Science and Technology is made up of eight research and development institutes, which all are fairly autonomous financially and have broad right for decision making.
The institutes are presided over by directors. Generally the director of an institute is also one of the leading professors in the field.
The internal structures of the institutes vary without any rigid uniformity. Common subdivisions are chairs (professorships), departments, labs. As a rule, the head of a subdivision is a leading professor in the field.
All institutes and often also the smaller sub-units, have their own web pages -- feel free to skim all of them