Adding or removing administrators
Administrators manage the people and structural settings that keep the account running day-to-day. Any admin or account owner can add or remove administrators by heading to Adminland from the Home screen or Account & Settings in the Basecamp menu and clicking the Add/remove administrators option:

There you'll see a list of all the current admins with links to remove them. At the bottom, you'll also find a spot to add new admins:

🗒️ NOTE: Administrators have fewer permissions than Account owners. See the differences here.