The Alfa Romeo engineers were announced a year ago when the sponsorship of Sauber by Alfa first started. Not this year with the full name change. The engineers were supposed to be on the team to help out with the engine tuning and other things. I don't have a reference as this was a year ago. I don't have any more info than that, but I am completely sure I read that as it made me feel Sauber had a more legitimate connection to Alfa, and not just a name sponsorship.
If this is not the case anymore, or was never actually the case, and a reporter got it wrong, I don't know. But again, this was not this years announcement. "ownership and management of Sauber will remain unchanged." would not change that if it was the case a year ago.
iachella [at] gmail [dot] com