NBCUniversal’s global ad chair Linda Yaccarino has resigned, the company said Friday.

The announcement comes a day after Elon Musk said via Twitter there would be a new CEO of the social media website, although he didn’t name the new person. Musk said in his tweet the person would start in about six weeks.

Yaccarino was said to be in advanced talks for the role, CNBC’s Julia Boorstin reported, citing sources.

Yaccarino joined NBCUniversal in 2011 and had risen to the top of the company’s global advertising business. On Monday the ad chief was slated to take part in NBCUniversal’s Upfront event at Radio City — the sales presentation the company, along with its media peers, make to the advertising industry every year in May.

The longtime ad executive brings a wealth of relationships with top chief marketing officers and other advertising executives to Twitter at a time when the website has seen advertisers flee and needs serious damage control.

This story is developing. Please check back for updates.

Disclosure: NBCUniversal is the parent company of CNBC.