Facebook‘s marketing director, Randi Zuckerberg, announced yesterday that she is leaving the company after six years to start a new media firm to help companies become more social. Randi Zuckerberg is also the sister of Facebook’s CEO and co-founder, Mark Zuckerberg.

In her resignation letter, wich can be read in full here, Zuckerberg said:

“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.”

Facebook has confirmed the departure in a statement:

“We can confirm Randi has decided to leave Facebook to start her own company. We are all grateful for her important service.

Mark Zuckerberg has not commented the resignation in person.

Her new company is called RtoZ Media, but no details about what activities the company will pursue has yet been disclosed. Facebook has not announced who will replace her in the position of marketing manager.

(via IT24.se)