Mary Barra was born in Royal Oak, Michigan, in 1961, joined General Motors at 18 as a co-op student inspecting fender panels and worked her way through engineering, manufacturing and human resources before being named chief executive in January 2014. She became chair of the board in 2016.

Her tenure has been defined by a deep portfolio rationalization — including the exit from several international markets and unprofitable product lines — and by a multi-billion-dollar industrial pivot toward electric vehicles, anchored by the Ultium battery platform and by Cruise, the company's autonomous-vehicle subsidiary. She has positioned GM as one of the most aggressive incumbent automakers on the electric transition.

Inside Detroit she is regarded as the executive who broke the company's historic tolerance for sprawling complexity; externally she has become a regular voice on industrial policy, manufacturing employment and the structure of the U.S. automotive supply chain.