I don't know what the situation is in the rest of the world, but here, JW's seem to have a very limited field of employment. They are, in approximate order of preference:
Double glazing salesperson.
Window cleaner.
Door to door brush sales.
Painter & decorator.
There seems to be virtually no professional occupations that are enjoyed by JW's. Also, very few seem to be involved in IT. No taxi-drivers, no publicans, no tax inspectors, no anything that requires either (a) variable workng hours or (b) long studying periods to learn a trade or profession. Additionally, it seems that women witnesses who actually do secular work, find it is confined to mainly shop assistancy or cleaning work.
It's a recognised fact that people tend to find a sense of identity by means of their secular occupation. I wonder if the witnesses were able to move up a few places in the employment stakes, whether or not they would remain good faithful witnesses?
I suspect that they would not remain good little witnesses. I know of several ex's who have kept to their non-professional occupations but have become business owners instead to give themselves more money, status and satisfaction. These have quickly discovered that they no longer have a need for Watchtowerdom, in fact, they usually find that once they are in business for themselves, JW stuff seems very wish-washy in comparison.
In short, then, if you want to stay a witness for ever, don't advance at all in your secular career!
Englishman.