Members of the Communication Workers Union will be urged to stand their ground as they hold their national conference today.
The organisation has been involved in a long running dispute with the operator of Ireland's 999 call centres - Conduit Global.
The CWU is expected to call for the Government to force all companies awarded state contracts to recognise unions.
President Paschal Connolly has this message for his members: “Solidarity amongst workers is what companies fear most.
“It remains the most effective weapon against the vices or forces.
“Organised workers are powerful workers and if we stick together hopefully we will come out in the end you know?”