John Ternus will become Apple's eighth CEO in September, continuing a tradition of internal promotion at the iPhone maker.
Industry experts have long speculated that the 50-year-old Ternus would become Cook's eventual successor.
Over the last 25 years at Apple, Ternus has become a key architect of the tech giant's robust product pipeline, managing hardware engineering for iPad, AirPods and recent iPhone models.
He has also played a significant role in Apple's Silicon chip program as it transitions away from Intel.
When Ternus takes the reins this September, he faces a significant obstacle: revamping the company's struggling artificial intelligence strategy.
CNBC's MacKenzie Sigalos has the story.
Reporter MacKenzie Sigalos
Producer by Drew Troast
Edited by Erin Black
Senior Director of Video Jeniece Pettitt
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Who Is John Ternus, Apple's New CEO?