I've just left Jetstar and started working for Qantas as an International Flight Attendant and can assure you that sign-on and crew briefing for International tech and cabin crew is over at QCC building in Mascot, before being transported as a group to Terminal 1.
The Qantas crew hotel in Los Angeles is also NOT in the CBD as this Dimitri guy has stated - it's actually in Orange County.
And Qantas tech crew I'm SURE follow the same company policy as cabin crew with regards to not entering the Qantas Club lounges whilst on duty and particularly not in uniform. Apparently "Captain" Dimitri enjoyed breakfast in there before heading to the aircraft... I don't think so!
Funny read.