I have worked both "with" and "for" JWs.
I have to say that not every JW has the same work ethic. I was always described as a 'good worker'. I didn't waste time making personal phone calls like my co-worker did, and sometimes I would skip a break, or have lunch at my desk so that my "In" basket stayed under control.
My co-worker, on the other hand, was a pioneer. She would come in late and leave early. If my back was turned, she'd pile her "In" basket stuff into mine. She would make long personal calls. She would sometimes give herself a manicure at the desk.
Another JW co-worker, a male, also a pioneer and elder. Similar work ethic to my co-worker. Personal calls galore. Long lunch breaks thinking he could get some witnessing time in with an unbaptized JW who also worked with us.
My boss was fair. We didn't have to work holidays, and he paid us according to whatever the law stipulated. He was also a hard worker, and put in long hours.
He didn't have the heart to fire my female co-worker because her parents were very close friends of his, and I think he truly felt an obligation to help her out because she was pioneering. He was inactive, and maybe psychologically it soothed his conscience a bit to have some pioneers there, thinking that by giving them jobs he was supporting the preaching work.
He hired another sister, also a long-time friend of his, as the office manager after I had been there for almost 2 years. She went in on a weekend to "orient" herself to where things were. When I came in on Monday morning, I found that she had gone through my desk. I never kept any personal items at work, so she didn't find anything, which I think disappointed her.
When I found another job, following this invasion of privacy, it was with a company that had no JWs in it at all. I'd had enough. The "sister" who had rifled through my desk warned me that 'worldly' companies and bosses would try to take advantage of me, and I was too naive. I thanked her for her 'concern' and also for the very direct lesson of not being able to trust people I worked with.
Of course, I gave my written notice for a certain date (I had given four weeks' notice), and this witch twisted things about and said I had quit effective immediately. She then tried to get me to sign a letter to the effect that I was leaving immediately of my own volition, so that I would not be able to collect Unemployment Benefits, and she with held my severance pay until I filed a complaint with the Labour Relations Board.
I would never work for a JW again. But that's just my experience.