Uber executive who worked on self-driving systems leaves the company

An Uber Technologies Inc. executive who worked on the ride-hailing company's self-driving vehicle program has left the firm. He is the third executive to exit Uber in two months. The San Francisco company confirmed the departure of Sherif Marakby, Uber's vice president of global vehicle programs, who joined the company a year ago and left Monday. Uber did not say why he left. The company said in a statement that Marakby's "deep experience and knowledge of the automotive industry" helped Uber "tremendously in working to make self-driving cars a reality."