http://www.minnesotanationalguard.org/units/assets/mos/31E.pdf  ( Patience, slow link! Archived material in the “wayback machine” loads slowly)

Here is the Minnesota National Guard official job description for this position.

You can view this 2010 Military Manual which details this operation on PDF:

Excerpts below are from a publicintelligence.net document USArmy-InternmentResettlement.pdf

Of particular interest chapter 10 (Chapter 10 begins on page 185 of the document

And these clarifications (DC stands for dislocated civilians):

Also note Chapter 3 Psychological Operations Officer (functions) on page 56

Why a sudden need to recruit for this position?  Granted this is an operation which our military carries out all over the world,wherever civilians are displaced by war and natural disasters, but this particular ad is for the NATIONAL GUARD.  That’s the home front, folks!