Apple COO Jeff Williams is retiring after 27 years. His exit marks another recent major leadership shift at the company.

Sabih Khan, Apple's new Chief Operating Officer, has a robust academic background in both engineering and economics. He holds bachelor's degrees in mechanical engineering and economics from Tufts University,

Sabih Khan, a 30-year veteran at Apple, currently serves as senior vice president of operations and will assume his new role later this month.