The owner of a workspace is the user who created the workspace. Only the owner of a workspace can change workspace ownership. To do so, navigate to settings ➡️ team ➡️ click on who you want to give ownership to.
If the owner of a workspace is not around anymore (has left the company, etc.), you will need to reach out to Toggl Hire support at support@hire.toggl.com. We will need to involve our legal team in the ownership transfer at that point.