Supervisors have a super-important job (didn't see that one coming, did you?). From setting goals for employees to organizing the workflow in the office, supervisors oversee all operations.
In the same breath, supervisors are a great resource for employees to look to. Supervisors are always trying to figure out how to do things more efficiently while making sure everyone is staying on top of their goals.
Unless you're needed to stay later, typically you'll only work a 40-hour week as a supervisor. The majority of employers will only hire supervisors who have a bachelor's degree. Sometimes there are options for those with only a high school diploma, you just have to find the right employer.