All psychologists who offer direct services to the public must be licensed or certified by the state or province in which they practice. Because licensure requirements vary from state to state and province to province, students should plan ahead to ensure they will be able to meet all requirements of a particular state or province. Licensure requires completion of a period of post-doctoral supervised experience (determined by the state or province) and successful completion of the Psychology Licensure Examination as well as satisfaction of other requirements of individual states or provinces.

Illinois Department of Professional Regulation