If I have a successful organization and a failure one, where do I place the successful manager and why?

Answer 1

In the failing organization so that the manager can prop it up, if you're planning on keeping the org. (But why would you keep a failure?)

If your other org is successful as is, why fix it if it isn't broken? Just because the manager has a track record of being successful in another third, unrelated org, doesn't mean that they'll do just as well or better in the successful org.

Answer 2

That depends if you still want to keep the failure one, if not then just leave it as it is