Applied online. Received an appointment to take the postal test (which is mostly memory) through e-mail the same day. Took the test later that week, and received my score the same day. Almost three weeks passed before I received another e-mail inviting me in for an interview. The interview was very informal. If you get invited to the interview and can pass the drug test and background check, your basically hired. However, the job is only guaranteed for 90 days.