zastavnik

1. (military rank) warrant officer
   Moj otac je penzionisani zastavnik Vojske Srbije. — My father is a retired warrant officer of the Serbian Army.
   Zastavnik je vojnicima podelio opremu. — The warrant officer handed out equipment to the soldiers.

In the Serbian Armed Forces zastavnik and zastavnik prve klase are the highest NCO ranks. In the former JNA, they were also classified as NCO ranks.