Apple has announced that Sabih Khan, the company’s vice president of operations, will take over for Jeff Williams as chief operating officer later this month. In an announcement on Tuesday, Apple said the move is part of a “long-planned succession” that has Williams retiring at the end of this year.

Having worked at Apple for nearly three decades, Williams has played a significant role in introducing the iPod and iPhone programs, leading the development of the Apple Watch, and overseeing the design team,

The legendary Apple design team hasn't had much luck holding onto leadership since Jony Ive left, and with COO Jeff Williams retiring, the leadership role will shift to CEO Tim Cook.