The admins! Typically, someone in HR, an administrative assistant, or a strategy officer will be the admin(s) for a company’s Ohana. We see the best use case with more than one admin combined with other people responsible for posting, for example the lead of each department posting once a week.
As for how time consuming it is to be an admin, it really depends on the type of content that is being posted. Posts are usually very quick to create/approve, making more of a transfer of time than an added task. Each department having an admin could look like as many or as few admins as wanted/needed. We haven’t had clients mention that the administrative role was too time consuming.