Apple's new CEO John Ternus steps into the spotlight after flying under the radar for years

LONDON (AP) — Apple's next CEO John Ternus is a company veteran who rose through the iPhone maker's hardware engineering ranks but until now has maintained a low profile.

Ternus will take over as chief executive in September for Tim Cook, who turned Apple into a $4 trillion, tech colossus during his 15-year reign after the death of co-founder Steve Jobs.

Ternus has spent almost his entire career with Apple. He joined the company 25 years ago and has spent the past five years overseeing the engineering that underlies the iPhone, iPad and Mac.

It's made him a prime contender to succeed Cook who on Monday, when Apple announced the change in leadership, hailed Ternus as “without question the right person to lead Apple into the future.”

His appointment appeared to be carefully timed, following Apple's 50th anniversary celebrations and ahead of its annual WWDC developers conference in June.

The change also arrives at a pivotal time for the Cupertino, California, company. While Cook led Apple through an iPhone-fueled era of prosperity, Apple has fallen behind in the artificial intelligence race. Apple has stumbled in its efforts to deliver new features built on AI, as was promised nearly two years ago.

“The challenge for the new CEO is really to make sure Apple is able to crack AI as the new user interface and reinvent human machine interaction," Forrester Research analyst Thomas Husson said.

Ternus is not well known outside of the Apple universe. He joined the company in July 2001, according to his LinkedIn profile, which does not have any posts.

Before joining Apple, he spent four years as a mechanical engineer at Virtual Research Systems. He graduated in 1997 from the University of Pennsylvania, where he was a member of the swim team and for his senior project developed a mechanical feeding arm for quadriplegics controlled by head movements.

Ternus said in Apple's announcement that he was "humbled to step into this role, and I promise to lead with the values and vision that have come to define this special place for half a century.”