The Waigani National Court convicted him after the court was satisfied beyond reasonable doubt that he did sexually penetrate his daughter following a trial.
He will return to court today where the court will hear submissions on sentence.
Presiding judge, Justice Nicholas Kirriwom in his ruling on verdict said the father lied to the court that he only sexually touched his daughter.
He said there was no logic that a sensible person would believe the father would have picked her up from school in three different occasions just to fondle her.
