Windows and doors from Germany's major window manufacturer. With 21 locations in Germany, 14 in France and 6 in the Czech Rep ... ublic, the hilzinger Group employs more than 1240 professionals. The product range contains windows, doors and facade systems, made out of pvc, aluminum and wood. As a medium-sized, family-run company, vocational training and continued employment remains an important concern for the hilzinger Group. read more