We all know the obvious ones, such as being a policeman/woman
I personally knew two policemen who were JW`s and one was a motor-cycle cop.who carried a gun ,the other was re-assigned to desk work and he was an Elder in good standing.
this was back in the 70`s-80`s in Australia.
In an adjoining congregation was a self employed sign writer who was doing work for a butchers shop at Xmas and was harrassed by the Elders for doing Xmas decorations on the butcher shop window ,and was DF. for defending his position of being employed by them .
It was common knowledge back then if you were self employed as a tradesmen you would not do any work for any church organization .
As I said this was back in the 70`s-80`s.,how different it is today when the GB sell their properties to religious organizations for $$$$$$$$$$