This is what I was thinking too, if a big firm hires a amateur cryptographer to make a new cipher it can be very costly later. So you need to be very good at it

This is what I was thinking too, if a big firm hires a amateur cryptographer to make a new cipher it can be very costly later. So you need to be very good at it to get a job. Secondly the jobs mostly exist on the cutting edge of research and revolve around future cryptography implementations.