If where you work is that bad, the question should be who's hiring.
I was unemployed and interviewed at a machine shop in Tinicum, PA. One look around as I rolled up for the interview said "Shady Area." The guy called later that day wanting to hire me. I passed on it due to my gut feeling of the necessity of keeping a 1911 in the top drawer of my tool box was an indication I shouldn't be working there.
Most places have a policy about carrying weapons at work. What you choose to do is your business. If you decide to keep something in your car DO NOT say anything about it, it does not exist. There have been many a post on many forums along these lines, "I got canned at XYZ for exercising my 2nd amendment rights." Every time it's come down to the person in question told their work buddy about it trying to show off and/or brag. Guess what, you signed a legally binding contract stating you would abide by your employer's policies regarding your conduct while on their property and on their dime.
I'm not trying to be rude, condescending, or a nickname of one Mr. Richard Head. Just making you aware of the hazards.
Be like our good buddy Sgt. Schultz. "Hogan, I know NOTHING!"