More than 150 trade unions have joined together to start thinking about how a united Ireland would look for workers.
They are calling for a debate on what the practicalities of a border poll would be before any vote is held.
The group will hold a congress in April with trade union reps north and south.
General Secretary of Mandate Trade Union John Douglas says serious thought needs to be put in before a vote:
"There's a huge job of work to do and we cannot wait for both governments, by virtue of an international treaty, to just suddenly say 'lets have a poll'.
"So there needs to be a deep debate among Irish citizens and the Irish political movement to discuss what a new construct could look like."