If injured on the job...and the person is a third party who injured you...can you sue them too?

i was injured at work...besides working compensation,can i sue my job for damages.also the reason why i was injured is because the janitor that works at night that works at my job to clean the store at night waxed the floor but left it unattended and with no c aution tape.the janitor works for another company.can i sue the janitorial company too