Sergeant Maurice McCabe is set to begin working with the Garda Professional Standards Unit tomorrow.
The sergeant, famous for his role in exposing the penalty points scandal, has been seconded to the unit and is expected to be there for at least a week.
Investigations are continuing into a fresh batch of allegations he has highlighted with Garda management, concerning the abuse of the penalty points system.
Minister for Transport Paschal Donohoe said the force's management are sending out the right signal by involving Sergeant McCabe - but their work must be transparent.
"Allegations that have been made like this are of great concern to me … I want to particularly welcome [McCabe]," he said.
"That's a very important signal, on many levels."
John Wilson, a former member of the force who also rose to prominence as a whistleblower, also claims the state is still losing millions of euro because summonses are not being served.