The investigation began in June 2018 after a SIT massage therapist student told the police the man kissed and touched her breast and groin area without her consent during an appointment at his home.
Crown prosecutor Mary-Jane Thomas told jurors during her closing address there was no reason to believe the events were consensual.
She admitted the complainant made some poor decisions, including remaining at the home after the incident.
However, the reason for that was because she needed money, and massage provided her only income, Thomas said.
Thomas highlighted that DNA was found on the complaint's pubis.
But defence counsel Bill Dawkins said the complainant's account was not credible.
He said it was not logical she was willing to stay and massage the man after he allegedly asked if he could place his hands on her.
Dawkins also asked why she kept scheduled appointments with him if it was true that he had asked her, in the first appointment, if she did a "happy ending".
However, the jury unanimously found the defendant guilty.
After the verdict, Judge Farnan thanked the jury and remanded the man until his sentencing on November 27.