Former Australian Border Force boss Roman Quaedvlieg – who was for a time the law enforcement face of the Coalition’s Stop the Boats campaign – has stayed relatively quiet since he threw his final bombs at his old boss Peter Dutton in his tell-all biography four years ago.

Now, Quaedvlieg, the inaugural Border Force commissioner, is holding out his cap to investors as he tries to raise $20 million to fund his private security outfit’s roll-up of three other companies.