Yes.  Per IRS instructions, civilian contractors in combat zones qualify.  They state to not include income and write at the top of the 1040 "Combat Zone Pay".   Here is a link https://www.irs.gov/newsroom/questions-answers-on-combat-zone-tax-provisions 

Kind of vague, but tonight I will research it more.  Downloaded  IRS Pub. 3 to read tonight and see if there is any clarification there.