Some more detail...
An IT Helpdesk and a team of DevOps engineers in my company both have service desks. It's somewhat frequent that either group will get requests better resolved by the other. The teams would like an ability to shuffle those tickets back and forth w/o giving everybody permissions in *both* projects. An ideal scenario would be an optional workflow step that allows a ticket to be dumped into a different service desk with the click of a transition button.
Does anything like this exist, even perhaps via a plug-in?