JPMorgan’s CEO Jamie Dimon reveals the career goal he adopted when he was just a 28-year-old assistant: Do not speak unless you can add value

Before he became the most powerful banking CEO in America, JPMorgan Chase’s CEO Jamie Dimon set himself a simple career rule that sounds almost radical in the age of personal branding: keep your mouth shut. 

As a 28‑year‑old Harvard MBA working as an assistant to American Express president Sanford “Sandy” Weill, Dimon wasn’t focused on “being visible” or chiming in on every meeting—he was focused on soaking everything in.

“My first goal was to learn something and not say anything...