Hey Badseed,
Don't worry.
Seriously, you have forgotten Rule #1, which is never forget the Second Amendment. It is perfectly legal to own those firearms, assuming you aren't a felon.
Second, unless your state has a registry, the specific information on what you own won't show up in any background check.
Third, if somebody would reject you based on firearm ownership, screw-em. Find another job. (In reality, you'll find very high firearm ownership in the crowd you are looking at joining. These will be the folks with political and legal connections that have no problem getting CCW permits. After all, these are the folks that "deserve" to protect themselves, unlike ordinary people, right?)
Relax. Enjoy your Second Amendment rights, and best of luck with your job.