The FAA Air Traffic Controller hiring process varies significantly from candidate to candidate and can last up to two years. After passing the application process and the ATSA test, there are other steps and procedures you must pass, such as the MMPI personality and psychopathology test, a drug screening, a security clearance, and a medical check. If you manage to pass these stages successfully, you will eventually get an FOL (Final Offer Letter) and start the FAA Academy.