As a retired Armed CPO with a major International Security Company, I can tell you from experience that if you were to carry on an Unarmed Contract at all, and use your weapon, you will be fired, possibly pull some serious jail time , plus get yourself blacklisted form the private contract security industry, and lose your CCW permit. Whatever civil action is brought against you by the individuals concerned, your on your own. ALso, your "former' Company will lose that contract and pay a heavy fine to the State Licensing Board. I've been there, take my word, do like your Supervisor tells you while you look for another site to work, or change Companies... 
It is obvious from the advise of the other two replies that these two gentlemen have never worked contract security!
MSgt, USAF (ret), Life Member - NRA, Life Member - NAHC,
Life Member - NCOA, Member - USCCA, Member - NCGR,
Member - Oathkeepers