Apple on Monday named John Ternus as its new chief executive officer, effective Sept. 1, and said that Tim Cook would take the role of executive chairman.

Apple announced on April 20 that John ​Ternus, senior vice president of hardware engineering, will become the company’s next CEO effective on September 1.

Johny Srouji, who was named chief hardware officer at the same time John Ternus was promoted to chief executive officer, made the disclosure in an email to Apple employees.