Randi Zuckerberg, Facebook's marketing director and sister of founder Mark, confirmed Wednesday that she will be leaving the social-networking site to start her own company.
"It is with mixed emotions that I announced my departure from Facebook today to launch my own initiative. More info soon," Zuckerberg tweeted today.
Her departure was first reported by All Things D, which obtained Zuckerberg's resignation letter. "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," she wrote.
Zuckerberg's new company is called RtoZ Media and will focus on helping companies embrace social media. "My goal is to launch my own innovative programming and work with media companies to develop their programming in new and more social ways," she wrote in the letter. "In attacking this challenge, Facebook will clearly be a central element in all of my projects. I plan to demonstrate that ANYONE can do groundbreaking media work on the platform."
Zuckerberg noted the accomplishments of which she is most proud, including Facebook's election and inauguration tie-ups with ABC and CNN, a Davos/Facebook partnership that allowed Facebook users to more closely follow the World Economic Forum, and the launch of Facebook Live, which culminated with President Obama's 2011 Facebook town hall.
"We are all grateful for her important service," a Facebook spokesman said in a statement.