Board Thread:Support Requests - Community Management/@comment-26369619-20150826140844/@comment-1709282-20150826141825

You can but that doesn't necessarily mean you should. Don't promote people without asking them if they want admin status on your wiki first. If they have zero edits on the wiki, that could mean they don't know anything about the wiki's topic or aren't interested in it. So again, ask them first.