I applied in-person. The process took 6 months. I interviewed at FAA (Tamiami, FL)
Interview
College in an approved aviation program. Interview, security and medical clearance. Training and simulation at FAA Academy in Oklahoma City, OK. OJT at assigned facility.
Interview questions [1]
Question 1
You have to be able to watch a horrific crash and then continue working, because if you work in a tower long enough you will experience this. No one can take your place when this happens. If you can't do this you should consider another career.