Two executives who have spent roughly three decades each at Apple are handing over responsibility for its displays, as part of a broader series of engineering leadership changes reported by Bloomberg 's Mark Gurman .

Victor Yin now oversees much of Apple's display development following years of preparation under Wei Chen and John Zhong. Chen and Zhong, each with approximately 30 years at the company, are taking on more limited responsibilities as advisers. Gurman describes their eventual departures as part of a succession process that has been underway for several years.

Apple's October promotions also include engineering leaders Rajesh Ambati, Louie Sanguinetti, and Derek Shaeffer, who have all become vice presidents.…