Two Key Executives Announce Their <br />Departure From Facebook One of them is <br />chief product officer Chris Cox. He has been with the company since <br />2005 and is a top aide to <br />CEO Mark Zuckerberg. Recently, Cox was in charge of <br />managing services like <br />Instagram and Messenger. The other executive leaving <br />Facebook is Chris Daniels. For the past year, he has been helping run WhatsApp<br />on Facebook's platform. Mark Zuckerberg, via statement Besides Daniels, other top executives at WhatsApp have left Facebook over the managing of personal data. These include both of WhatsApp's founders, Jan Koum and Brian Acton.