How do security companies make money?

How do security firms make money?
To gain clients, highly reputable security companies use their influence and expertise. They accomplish this by providing clients with security measures, advice, and recommendations on their security needs, including strategies, manpower, and gadgets.
How to Get a Job as a Security Guard
Apply for a government-approved security guard training course.
Get some training...
Take a first-aid class.
Conduct a background check.
Make sure you have proper identification.
Submit the application materials.
Examine your physical fitness.
Continue to learn on the job.