In becoming certified or registered you are eligible to apply pesticides as part of your employment. However, your certification/registration does not allow you to legally operate a business where you apply pesticides for hire. In addition to pesticide applicator credentials, a pesticide application business licenseis also required to apply for hire.
Check out the Michigan Department of Agriculture & Rural Development’s tool, Michigan Business One Stop, that will help you identify Michigan regulations for any business you want to set up.