It really isn't that hard to find a jop smoking weed. Most will probably do one when they first hire you, so get clean a month or so ahead of time. And when they really want to fire you and need a reason or because it has been reported to them that you smoke.

At least thats what I'm thinking. As for psychology, you could start your own practice and than you wouldn't have to worry about it as much. You would have to be able to keep it from being known though. You could lose clients if it were found out by them.

I just got an awsome thought of smoking with a shrink during a visit.