I applied online. The process took 2 months. I interviewed at Defense Finance and Accounting Service (Columbus, OH) in Sep 2016
Interview
There was a typical personally screening phone interview followed by a panel of three people who you probably will never see again. I was then asked 5 planned basic situational interview questions.
Interview questions [1]
Question 1
Just google typical situational questions and prepare using what you find. They were really generic.