That wouldn't be his call. The CEO sets the direction for the company, the CFO figures out how to pay for it.
Tim Cook did a major reorg in 2012 in which he promoted Eddy Cue to SVP of Internet Software and Services.
The software and services area has grown to a 4+ Billion dollar a quarter business.
Well, the CEO might set the direction but these days one of the CFO's jobs is to help set the direction by helping the team by forecasting the best routes for the company. If Cook has already decided to make services a more important aspect of the company then he might have hired Maestri for that exact purpose.
Besides, not once in my comment did I allude to this being Maestri's call.