It is not necessary to have a high school diploma in order to take an online CPO certification class to become an Certified Pool Operator. Once obtained, this certification is valid for five years. The National Swimming Pool Foundation administers and monitors these exams.
A high school diploma is a prerequisite for taking a CPO certification class to become a Certified Paraoptometric. This certification is available through the American Optometric Association.
While a high school diploma is not necessary to take a CPO certification class to become a Certified Protection Officer, it is necessary to have six months of full-time experience in the field as a protection officer. Students may apply, but do not receive the certification until they gain the necessary experience.