Becoming an air traffic controller?

Not sure now, but I started in the USAF years (too many to mention) ago. Then when I got out, went to work for CAA (Before the FAA) at Seattle-Tacoma International Airport (SeaTac or SEA). In the days of the round engines ATC was interesting, Radar was just coming into the system and would fail at least once a day. Engine out appoaches were very common in those days