Gwynne Shotwell, Elon Musk’s No. 2 at SpaceX, Is the Company’s Steady Hand

Gwynne Shotwell, the president and chief operating officer, is the adult-in-the-room foil to Mr. Musk as SpaceX prepares for a blockbuster initial public offering.Gwynne Shotwell, SpaceX’s president and chief operating officer, in Miami Beach last year during one of her infrequent public appearances. “I love working for Elon,” she has said.