Cody24, I was also sent an email for medical and security clearance (on Tues 15th) and I emailed them right away to get clarification on whether I needed to go through the entire process with a full medical and paying the $170 for security checks, because like your colleague I also currently work within the Qantas Group.
I haven't received any email response yet, and tried calling the recruitment team twice yesterday with no answer. I guess they were just out of the office. Will be trying again first thing on Monday.
I remember them telling us QF Group employees at the candidate event that we don't need to complete the whole med/security process, and assumed there'd just be some transfer of details?
So hopefully this is the case, otherwise I'm wasting time that I could otherwise be booking in an appointment and sending off forms.