Twitter COO Ali Rowghani Resigns

NEW YORK (AP) -

Twitter’s chief operating officer, Ali Rowghani, has resigned from his post and won’t be replaced, as CEO Dick Costolo seeks more direct involvement with the company’s engineering and product teams.

Rowghani joined Twitter in 2010 as chief financial officer, and became COO two years later.

Twitter Inc. said in a regulatory filing Thursday that Rowghani’s responsibilities will be shifted to other executives. It did not give a reason for his departure. With the shift, Twitter joins other tech companies, such as Google, Yahoo and Apple, that do not have a COO. Facebook’s Sheryl Sandberg is a notable exception.

Rowghani had been tasked with expanding Twitter’s user base, but this has not happened as quickly as investors had hoped.

Rowghani’s departure comes less than two weeks after Christopher Fry, Twitter’s senior vice president of engineering, resigned and took on an advisory role. He was replaced by Alexander Roetter, who’d been Twitter’s vice president of engineering.