I hope you stay employed, too! It's never fun to be unemployed unexpectedly or have things go sour at work. Let us know how it goes!
This scenario has been on my mind for my job as well. My boss and the next senior-level employee I work with have been employed long enough to retire. One or both of their departures could negatively impact my position. That, coupled with many other reasons, is why I am trying to pre-empt this scenario by leaving first! My DH and I are currently planning my exit to become a full-time stay-at-home mom by the end of the year. This is one of the reasons our August vacation is on such a low budget--we are getting prepared for the transition!