http://www.minnesotanationalguard.org/units/assets/mos/31E.pdf 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:
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