BTW, a Security Contractor is such a broad term these days. If you work for a Private Security Company, you could managing a bunch of Ugs in a FOB, a desk clerk submitting MNFI badge applications, or actually part of a security detail team. Thus, the career field is wide open to all kinds of folks.
If you don't have have a military background, your odds go way down of even getting someone to read your CV for the good "operational" jobs. You still may get something like an IT gig, or serve coffee at the Green Bean...