Motorola's Strategy Chief Is Latest to Exit

Rich Nottenburg, Motorola Inc.'s chief strategy and technology officer, resigned amid continued turmoil in the company's executive ranks.

Mr. Nottenburg's departure leaves Chief Executive Greg Brown with a shrinking pool of senior staff to help him steer Motorola as demand plummets for its cellphones and as activist investor Carl Icahn takes a greater role through two representatives on the board.

The Schaumburg, Ill., equipment maker has been reeling from the meltdown of its mobile devices division, which has lost $1.6 billion since January 2007. Since former chief executive Ed Zander resigned under pressure in December, the company has lost or ...