 In 2005 and 2006, Parke was seconded from the Department of Management to establish the new UN Ethics Office, laying the foundations for a permanent unit within the UN that would eventually serve 29,000 personnel worldwide in relation to issues of ethics, transparency and good governance.From mid-2006 to early 2007, Parke worked as the deputy chief of staff and legal adviser in the UN International Independent Investigation Commission (UNIIIC) in Beirut, Lebanon, investigating the assassination of the former Lebanese prime minister Rafik Hariri and other terrorist attacks in Lebanon.Parke returned to her post in New York in early 2007 and left the United Nations in June of that year to return to Fremantle, Australia to stand for federal parliament.