careful
Speaking both as an employer then later as an an employee.
When I ran a business I would try to find the best employees I could. If one of these guys had a problem I would bend over backwards to see if things could be worked out. If the guy had found a better job that I could not match at the time , I would wish him luck and keep the door open. If the employee was not, that good I did not bend, I would simply wish him goodbye.
Some years ago during the final strike with Eastern Airlines I had people who were vastly, overqualified ,working for me doing mundane tasks with the mutual understanding that when the strike was over they would leave and go back to work and that if I ran out of work they would be the first to go. The way the Eastern strike turned out, I ended up with a couple of very good employees who stayed with me for several years and became very valuable to the business.
Later I closed the business due to a mini recession giving my people ample notice and a chance to secure new jobs, and moved to California as an employee. At first life was good until another mini-recession hit, at which time I discovered that I was just a number. If the company had no work you did not either. Even if you are "overqualified" for a job take it anyway. Right now in this economy we have PhD's driving taxicabs in San Diego, and when the "right" job turns up simply tell your employer you have received a better offer.
B.E.