It's a 3-4 day interview process. That doesn't include the time it took for the prescreening or testing phases. The application is tedious. You should have a good employment, DMV, and medical record. The testing takes place at a facility that may not be near you. Be prepared to take a 3 part test with memorization, US Postal Service forms, address validation, and combination thereof to rule out dyslexia for about 30-60 minutes. A 70% is the minimum passing grade, however, not likely to qualify for an interview.