A Sydney hospital is under pressure to explain why it sacked a whistleblower who had reported the alleged indecent assault of a sedated patient within an acute mental health unit. Security guard Brendan Osmond had worked for 23 years at St Vincent’s hospital in inner Sydney before he was dismissed from his position as a supervisor earlier this year. The sacking came after Mr Osmond reported that he witnessed a fellow security guard touch the breast of a patient during a pat-down in the hospital’s acute psychiatric ward seclusion room.