Well I suppose it would depend on the person. Getting a job may become easier as more people seek to grow weed to try to make money, and may begin hiring others to help them (although this is probably unlikely). As far as keeping a job goes, I suppose it depends on the person, really. Like, if they use legalisation as an excuse to get so high they can't really go to their job, it will not work out well. It could help to motivate others to find employment. Others still will not be affected at all.