The parent company and the main administration of Rosenberger is in Fridolfing in the southeast of Germany in the middle of the Upper Bavarian foothills. From the locksmith's shop founded by Hans Rosenberger senior in 1958, the internationally operating Rosenberger Group developed over the course of six decades. Together with its partner companies, it is now one of the world's leading providers in the areas of high frequency, high voltage and fiber optic technology.
This makes Rosenberger one of the largest and most attractive employers in the region. The company is still family-owned with the brothers Hans Rosenberger, Bernhard Rosenberger and Peter Rosenberger as managing directors.