If you apply pesticides commercially and you are not a technician or trainee, you need a Pesticide Exterminator licence from the Ministry of the Environment, Conservation and Parks (MECP) 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 MECP.
Unlicensed assistants, working without onsite direct supervision will have to successfully complete a training program which includes taking a MECP 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.