OWWCO oversees operator certification in Ontario, administering exams, processing applications and renewals. There are approximately 10,000 operators, with 4,300 receiving new certificates and 4,500 renewing annually. Operators start as OITs, and can upgrade to Level 1 with experience. Higher levels require more experience, education, and hours as operator-in-charge. OWWCO works closely with the MOECC and operators to continuously improve the certification program.