When I was in the Army, first, I would never be given time off to fly around the country for job interviews. This could only happen if I was approved to take leave; if I was on leave I was not in duty status and would not be authorized to wear the uniform. It would have definitely been a UCMJ offense to wear the uniform in public for a job interview. Second, if the guy has already ETS'd, then he is not authorized to wear the uniform at all, except for military funerals, etc. Something here isn't adding up, or maybe the rules have changed?
From other sources, he appears to be in the National Guard now. I've never known anybody in the military or retired military that went to a civilian job interview in their uniform. Must have changed the regulations, since I retired about 20 years ago.