Becoming a Security Guard in South Carolina is similar to a lot of other states: you need to meet basic requirements such as age, language proficiency, and other usual security licensing requirements of this nature.
Furthermore, to get a Security Guard license in South Carolina, you need to take a government approved Security Guard licensing course:
"Primary Basic" security license course.
In SC, the government body that controls a South Carolina Security Guard's license is the South Carolina Law Enforcement Division.
So, it is SLED