The number of executive departures from Uber is growing.

Jeff Jones, Uber’s president of ride sharing, has left the company after just six months, Uber said on Sunday. In addition, Brian McClendon, vice president of maps and business platform at Uber, also plans to leave at the end of the month.

The two men are exiting Uber under very different circumstances. Mr. Jones, who was poached from Target to be Uber’s No. 2 executive, resigned after the ride-sharing company’s chief, Travis Kalanick, said he needed leadership help and began a search for a chief operating officer.

Mr. McClendon is departing amicably from Uber and will be an adviser to the company. In a statement, he said he was moving back to Kansas, where he is from, to explore politics. His exit has been in the works for some time, and his last day at Uber is March 28.

The departures add to the executive exodus from Uber this year. Raffi Krikorian, a well-regarded director in Uber’s self-driving division, left the company last week, while Gary Marcus, who joined Uber in December after Uber acquired his company, left this month. Uber also asked for the resignation of Amit Singhal, a top engineer who failed to disclose a sexual harassment claim against him at his previous employer, Google, before joining Uber. And Ed Baker, another senior executive, left this month as well.