I had previously asked a question about the procedure for removing moderators who become inactive from moderating their site, and the answer basically boiled down to this: a moderator has to take at least one moderator action every six months to avoid having their privileges potentially removed for inactivity.
Now, if a moderator gets hired as a Stack Exchange employee (which isn't an uncommon occurrence) and their specific job title entitles them to hold moderator rights across the network, they will (obviously) continue to hold moderator rights on sites where they were previously elected/appointed, regardless of the above inactivity policy, for as long as they're an employee.
Additionally, from what few cases I've seen, once such a moderator ceases their employment, they'll still continue to hold moderator rights on sites they were previously elected/appointed on (unless the site changed phases/graduated in the meantime).
Moderators who get employed by SE often don't continue to moderate their sites while they're an employee - most of their time now gets taken up by their job duties. As such, it's possible that they may not have time to perform at least one moderator action on sites they previously moderated during their time as an SE employee - which would ordinarily lead to them losing their moderator rights under the inactivity policy, the only barrier to that being their staff moderator right entitlement.
Considering these, are former moderators who later become SE employees still expected to take at least one moderator action on sites where they were previously elected/appointed as moderators while they're an employee, to avoid their moderator rights on that site being removed once they cease their employment? Or will they still get to retain their rights, being exempt from the inactivity policy since they were active in their duties as a staff member?
(The inactivity process I linked does mention that an election/appointment has to take place to fill in the gap before the inactivity removal can be carried out, but said election/appointment already takes place shortly after the moderator becomes an employee, so that stage is usually unnecessary once they cease employment.)