NATION

John F. Mitchell, currently president and chief operating officer, will become a vice chairman and officer of the board of Motorola Inc., Schaumburg, Ill., effective Jan. 1. George M. C. Fisher, currently senior executive vice president and deputy to the chief executive, will become president and CEO. Vice Chairman and CEO William J. Weisz will continue as vice chairman and become an officer of the board. The changes are part of Motorola’s leadership transition plan.