I’ve always wondered how people ended up with that job.

Did they typically come from a certain social class? Was it considered a lowly job or more middling? Was their job secretive or did their family know what they did for a living? Did every town have an executioner?
How many people who attended executions would have known who the executioner was? Why was it important that they were disguised with a black hood when they were doing their “duties”?