He turned a $10,000 SpaceX grant into about $880,000 — then left to weld for Elon Musk’s rival

When SpaceX goes public on June 12 with an IPO share price of $135, the offering may make its billionaire founder, Elon Musk, the world's first trillionaire (1).

While that staggering wealth accumulation grabs headlines, stories of ordinary employees set to make personal fortunes off their shares could prove even more intriguing.

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One of those workers — former SpaceX employee Juan Hernandez — is among them.

The 42-year-old immigrated from Mexico to the U.S. and told the Wall Street Journal that he "didn't even know what SpaceX was when my friend was talking about it" back in 2015 (2).

A welder by trade, Hernandez applied for a $28-an-hour job as a contractor with SpaceX that year because "the money was sufficient at the time."