Billionaire Jared Isaacman spent 2½ years training for a historic 10-minute spacewalk — while simultaneously running a nearly $8 billion company. Isaacman, 41, financed and commanded a SpaceX mission last month that featured the first-ever all-civilian spacewalk, during which he personally floated outside a Dragon space capsule. Isaacman, who has an estimated net worth of $1.5 billion, says he didn't take a leave of absence during those two-plus years of training. The trip was Isaacman's second space venture: In 2021, he financed and led the SpaceX team that became the world's first all-civilian crew to reach orbit. Once in space, the crew worked around the clock, conducting dozens of research experiments in five days while monitoring the capsule and its systems.

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Persons: Jared Isaacman, He's, I've, Isaacman, —, Get Organizations: SpaceX, CNBC, Revel Systems Locations: Shift4, Los Angeles