A small company has a relatively high employee turnover rate. There are a handful of employees, however, that have stuck around and know the ins and outs of handling the company's business. The basic company structure is CEO, manager, and then there are supposed to be some ancillary positions, but the manager is currently wearing those hats (the positions aren't filled due to complacency or what have you). Some of the seasoned employees know that the manager intends to leave the company soon, but the CEO doesn't know and will probably be blind-sided. This leaves the now-smaller handful of seasoned employees as the ones who will probably be responsible for on-boarding that deficit.
Now obviously there are no positions on the table because officially they haven't been vacated. What strategies exist to improves one's own position in a company on this knowledge? And to take it a step further, say you plan to leave soon, too, but you still want to improve your position for the interim, is a strategy worth pursuing on a 6-8 month horizon?
Note that I do not work at [the company], so my ability to clarify anything will be limited.