When Mitch Rowe quit, the board did not name an interim. When James Smith resigned, they didn't either.
The Department Heads ran their Departments and the Chair of the BOS did the necessary contract signing, etc. on behalf of the County.
That worked well and didn't cost the county any more money.
Now what ? The board will be having a special meeting to figure out what to do next. Hopefully they will admit to themselves that they really don't want a county manager, or at least admit that some of them have no intention to let a County manager manage. There are a few supervisors who act like spoiled brats who want to control everything.