Twitter has appointed American Express executive Leslie Berland as its Chief Marketing Officer. Twitter’s CEO Jack Dorsey tweeted “Welcoming @leslieberland to Twitter! She will join as our CMO to help tell the stories of our iconic product!” 

The new appointment comes after four top executives left Twitter. Media head Katie Jacobs Stanton, product head Kevin Weil, the head of the engineering division, Alex Roetter, and HR head Brian “Skip” Schipper left the company. The product head Kevin Weil is supposed to join Facebook-owned Instagram as its Product Head. 

Berland, who joined AmEx in 2005 and is currently executive vice president of global advertising, marketing and digital partnerships at American Express, confirmed her new job via a tweet.

Twitter Chief Operating Officer Adam Bain sent a series of tweets on Berland. “In my role, I get to talk to the best and brightest in mktg. So when we originally drafted our dream list of CMOs, @leslieberland was #1.”