I beleive Aero Care lost the DJ ground handling contract in SYD ages ago. DJ haev employed direct employees in Syd for a while now.
There will probably be a change in the make up of DJ and ground handling soon should Patricks get Aero Care like they have hinted. That would see all ports go back to Aero Care.
It will be wierd, a company, employing a contracting company of which they own themselves, and ingenious plan to shaft the staff.