Palo Alto, Calif. — Randi Zuckerberg, director of marketing at Facebook and the sister of CEO and co-founder Mark Zuckerberg, announced that she is leaving the social network to start her own media firm, as AllThingsD first reported Wednesday

“I have spent my years at Facebook pouring my heart and soul into innovating and pushing the media industry forward by introducing new concepts around live, social, participatory viewing that the media industry has since adopted. We have made incredible progress, but there is still much to be done and other ways I can affect change. Now is the perfect time for me to move outside of Facebook to build a company focused on the exciting trends underway in the media industry,” Zuckerberg wrote in her resignation statement.

Zuckerberg said her recent maternity leave gave her time to think about her career goals. That led to the establishment of  RtoZ Media, a new firm aimed at helping companies become more social.

Among her achievements at Facebook, Zuckerberg was the driving force behind Facebook Live, a real-time news show she created and hosted for the company, in which role she was part of the team behind the 2010 ABC/Facebook Live Election Night Coverage that was nominated for an Emmy award in the category of live coverage of a current news event.

Related Links: (AllThingsD)