The Mercury understands that the meeting was held in the Hobart Town Hall and Ms Campbell is in the state for three hours.
Community Public Service Union Tasmania secretary Paul Blake said Ms Campbell has held similiar question and answer sessions around the country.
Mr Blake said staff questions are vetted beforehand.
The controversial robo-debt policy and protracted staff wage negotiations are the source of growing frustration among union members, he said.
Changes to the robo-debt policy announced by Human Services Minister Alan Tudge on Wednesday mean that private debt collectors will no longer be sent to demand payment for debts that are under review.
But clients must still be able to prove that debts generated by the error-riddled system are not theirs.
Mr Blake said Mr Tudge’s changes don’t go far enough.
He said the Tasmanian CPSU branch is considering industrial action in the wake of a protracted three-year negotiation around wage and working conditions. Mr Blake said the 36 million unanswered calls to the Centrelink was hurting its ability to provide good customer service.