I have applied for this job the last three times it has been open and have spoken directly to the guys running the SMF and OKC offices about it.
Bottom line: Don't even bother applying unless you have prior MIL experience or are a Federal transfer. The veteran's preference and Fed transfer points put all those apps at the top of the list as is required by law.
One guy I spoke to who works there was an airline guy, got furloughed and went to work for the TSA. It was the only way he got his foot in the Federal door.