ISTJ

Mary Barra

Chair & CEO of General Motors

Rose from a GM plant floor through manufacturing, HR and product — an operator who turned a 100-year-old automaker toward EVs without blowing up the process culture

Wikipedia →

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MBTI — ISTJ "The Inspector"

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Big Five Personality

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Enneagram — Type 1w2

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Core: The Reformer

Principled, purposeful, self-controlled

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Wing: The Helper

Generous, caring, people-pleasing

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DISC Profile

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Holland Code — CER

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