Oracle has learned things along the way with mergers. They have departments specifically to help facilitate these mergers to ensure a smooth transition. Jobs won't be lost at first. They will merge the new company with one of its business units. Over time, the sales process will eventually morph into the Oracle way of things. This means that certain processes are done in certain regions. Those roles which were previously done in AUS, will now be done, say Texas.
So, the answer really depends on how many people are doing certain roles, and where those roles are done in Oracle today.
I recall after the acquisition of Siebel back in 2006, I went to visit the campus in Foster City. It was a ghost town. They let everyone go. Like I said, Oracle has learned a few things a long the way.