An Amazon executive who recently announced his surprising resignation is joining logistics startup Flexport as its new CEO. Flexport announced Wednesday that Dave Clark will begin his new role at the San Francisco-based company on Sept. 1. Clark and Flexport’s current CEO, Ryan Petersen, will serve as co-CEOs for the first six months. After that period, Petersen will transition to serve as the executive chairman of the company. On Friday, Clark announced his departure from Amazon, where he worked for 23 years. The move signaled the company was looking to make changes to its troubled consumer division.