The employee must:

• Be paid on a salaried basis and meet the minimum salary test;
• Have a primary duty to perform work requiring advanced knowledge or invention, imagination, or originality;
• Work in a field of science or learning or talent in a recognized field of artistic or creative endeavor; and
• Use knowledge customarily acquired by a prolonged course of specialized intellectual instruction.

The professional exemption rarely applies in police departments. Some examples include police attorneys or police psychologists. 29 C.F.R. § 541.