FILE - John Ternus, Apple's V.P. of Hardware Engineering, discuss the latest development for the iPad Pro during an event to announce new products Tuesday Oct. 30, 2018, in the Brooklyn borough of New York. (AP Photo/Bebeto Matthews, File)

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 run after the death of co-founder Steve Jobs.

Ternus faces challenges that will force him to step out of his comfort zone in hardware engineering. Beyond finding ways to keep Apple competitive in the artificial intelligence race, he will need to navigate supply chain questions and relationships with figures like President Donald Trump, who offered public praise for his predecessor on Tuesday.

Although Cook is handing over the CEO reins at Apple, he is widely expected to help the Cupertino, California, company maintain a good relationship with Trump after he shifts over to his new role as executive chairman.

Ternus, 50, 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 made him the 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.”

Ternus worked on some of Apple’s signature products under Cook, including the Apple Watch, AirPods and Apple Vision Pro. He was also involved in the MacBook Neo, “arguably one of the most disruptive products” that Apple has released in a while, said Ben Wood, chief analyst at CCS Insight.

“This mentorship will undoubtedly ensure a smooth transition, and initially, I expect very few changes to the company’s strategy,” Wood said.

The 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 company. While Cook led Apple through an iPhone-fueled era of prosperity, Apple has fallen behind in the AI 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.

Wood says attention at WWDC will be on the new CEO’s AI strategy, and what the company will do next after turning earlier this year to Google — an early leader in the AI race — to help make the iPhone’s virtual assistant Siri more conversational and versatile.