Apply to work as a poll worker
Poll workers usually work in the riding where they live. However, you can apply to work in the riding of your choice. After you click on "Apply now", you will be able to select in which riding you would like to work.
The job application form is in the Voter Information Service. Entering your postal code will take you to the application form to work in the riding where you live. Other search options will let you select the riding of your choice.