He was from 1979 Platoon leader and then as company commander at Panzerbataillon 14 in Wels in service.

Later Commenda graduated at the National Defense Academy in Vienna a general staff training, which he completed in 1988 with honors.

from 1988 to 1991, Commenda was the chief instructor of tactics at the National Defense Academy.

From 1993 to 1995 he was chief of staff and deputy brigade commander of the 3rd Panzer-Grenadier-Brigade in Mautern.

[4] As chief of the general staff, Robert Brieger followed in July 2018.