Apple’s chief operating officer plans to hand the role off this month and retire later this year after roughly a decade as the tech giant’s No. 2 under Chief Executive Tim Cook.

A once leading candidate to replace Tim Cook as Apple’s CEO announced his retirement Tuesday. Chief Operating Officer Jeff Williams, who has worked at Apple for 27 years, will be replaced in a “long-planned succession” by Sabih Khan,

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.