The definitions giving by the U.N. for the other activities appear to be nefarious in their own right:
Demobilization is the formal and controlled discharge of active combatants from armed forces and groups, including a phase of “reinsertion” which provides short-term assistance to ex-combatants.
Reintegration is the process by which ex-combatants acquire civilian status and gain sustainable employment and income. It is a political, social and economic process with an open time-frame, primarily taking place in communities at the local level.
The want ad makes no other reference to a “country or region concerned” other than the “duty station” in New York which is also the location of U.N. headquarters.
But if this position is indeed for field work in the U.S., it raises a whole series of sovereignty issues especially as it pertains to “the collection, documentation, control and disposal of small arms, ammunition” from the civilian population.
Also, if this Peacekeeper’s jurisdiction is in fact in the U.S., then it certainly seems like the U.N. anticipates mass civil unrest to occur.
Then again, maybe they’re just coming here to force Detroit to give away free water?