Facebook announced on Monday that Sherly Sandberg has joined the company's board of directors. She is the company's first ever female board member.

In a world where women are lacking in board membership in large conglomerates and multinational companies, this isn't the end of such a feat. Sandberg oversees Facebook's business operations including sales, marketing, business development, legal, human resources, public policy and communications. And when you think about that, she might as well oversee the whole company.

She will join existing members such as Mark Zuckerberg, Netflix chairman and CEO Reed Hastings and chairman and CEO of The Washington Post Company, Donald E. Graham.

“Sheryl has been my partner in running Facebook and has been central to our growth and success over the years,” said Mark Zuckerberg, founder and CEO of Facebook, in a written statement. “Her understanding of our mission and long-term opportunity, and her experience both at Facebook and on public company boards makes her a natural fit for our board.”

But of course, this isn't Sandberg's first board appointment. She's no stranger to it and is in on the board of several companies including The Walt Disney Company and Women for Women International.

Image via World Economic Forum, Flickr