Do you have to be trained in a security company to be a security guard?

Generally speaking, trained security guards have more formal professional standards. Without training, there is no advantage in applying for security guards. It is best to go to training. Nowadays, many companies need security certificates or veterans' certificates from security companies, which is more advantageous. This has its own advantages. If you want to be better than others, you can only create opportunities by yourself. Give yourself more opportunities, right?