If you apply pesticides commercially and you are not a technician or trainee, you need a Pesticide Exterminator licence from the Ministry of Environment Climate Change (MOECC) which authorizes you to apply pesticides according to your licence. All new exterminators are required to successfully complete a certification exam prior to obtaining the exterminator licence from the MOECC.
Unlicensed assistants, working without onsite direct supervision will have to successfully complete a training program which includes taking a MOECC approved pesticide safety course and practical training from a licensed exterminator to become a technician. Technicians can apply pesticides with specific restrictions of duties under the supervision of a licensed exterminator, who must visit at least once a week to observe the application. Unlicensed assistants who have not completed the training to become technicians must be directly supervised by a licensed exterminator at all times and are known as trainees.