Which famous tech CEO worked as a night shift security guard at a factory to fund their early startup before becoming a billionaire?

Before they became household names leading some of the world's most influential companies, many famous CEOs had surprising early career paths. Their journeys to the top weren't always straightforward, with many pivotal moments shaping their leadership styles. This trivia question explores one such interesting career transition that might surprise even those who follow business leaders closely.

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Elon Musk, who guarded a lumber factory while coding PayPal's early prototype
Mark Zuckerberg, who secured a pharmaceutical plant while developing Facebook in his dorm room
Jeff Bezos, who monitored an electronics factory before launching Amazon from his garage
Sundar Pichai, who worked security at a software company before joining Google