Gartenberg's new position at Apple was first reported on Wednesday by Connie Guglielmo of Forbes. Aside from his position in marketing under Schiller, it's unknown exactly what role he will take at the Cupertino, Calif., company.
The analyst previously had a brief stint as an evangelist with Microsoft in 2007, but that role only lasted a month. He is one of the most well-known analysts in the tech industry.
In other roles, Gartenberg was an analyst and partner at Altimeter Group, vice president of strategy at Interpret LLC, and research director at Jupiter Research. He's also served on the board of directors for the Consumer Electronics Association, which runs the annual Consumer Electronics Show.
Other high-profile hires made by Apple this year include Kevin Lynch, former chief technology officer at Adobe, and Josh Rosenstock, ex director of external corporate communications at Rolls-Royce.