Obtain a pesticide applicator's license in any category.
Complete an EPA-approved train-the-trainer program for trainers of handlers.
Obtain official designation as a trainer of pesticide handlers from the EPA or the State or Tribal agency responsible for pesticide enforcement.
Some states may require special qualifications in addition to federal WPS requirements. For example, some states require handler trainers to complete a state-run train-the-trainer program, or pass a WPS exam. Contact the state pesticide regulatory agency in the state you will be working in to see if there are any additional requirements you must meet.