Uber's head of global operations is the latest executive to step down at the troubled ride-hailing company.
Ryan Graves told staff in an email Thursday that he will transition out of his role as senior vice president of global operations in mid-September.
Graves will remain on Uber's board.
Graves was Uber's first hire a little more than seven years ago. He also served as the San Francisco-based company's first CEO, in 2010.
Graves thanked staff and former Uber CEO Travis Kalanick. Kalanick resigned under pressure in June after a months-long investigation into sexual harassment and other behavior problems at the company.
Uber has fired at least 20 employees as a result of that investigation.
Graves said he will support Uber's new CEO once that person is hired.