Robin Wheeler, Twitter's head of ad sales, is no longer working for the company, Platformer reported.
Wheeler was fired a week after reports said Elon Musk convinced her not to resign.
One source also told Insider Wheeler had been fired but declined to give additional details.
Since Elon Musk acquired the social media platform for $44 billion at the end of October, the company has made sweeping cuts to its workforce of 7,500 employees.
"It might not seem like a big deal, but I don't think it's appropriate to treat employees like this," one worker told Insider's Jyoti Mann.