WWI German NCO
Unclear if he is a Unteroffizier (Corporal) or Gefreiter (Lance Corporal) and appears to be wearing the M1910 or M1915 Waffenrock (uniform) with post 1915 shortened collar rank. The award on his bluse is the Iron Cross 2nd Class for Non-Combatant participation. He served in supply/logistics.
For a client.