I would do some research on the hiring process of the CBP. There's a reason that they're short handed. From talking to recruiters and others that are currently employed by the CBP they will hire anyone that meets their minimum requirements. The hold up is that over 60% fail the polygraph. Reading about it, they're ridiculous on they're poly and that will go on your permanent record for any other government job in the future.

I've held a TS clearance and have had several polys throughout my career and a dick examiner can make the process a miserable one. The deciding factor for me not to apply to the CBP was that you will have to move to the location that they offer and it looks like the middle of nowhere TX is most likely where you're going to start.