Facebook has announced it has appointed a new chief financial officer to the role that's been vacant for a few months following the departure of the former incumbent, supposedly after differences with Facebook boss Mark Zuckerberg.

39-year-old David Ebersman, former executive vice president and chief financial officer of Genentech, a biotechnology firm where he worked for 15 years, is Facebook's new CFO and will report directly to Zuckerberg.

Ebersman will oversee Facebook's finance, accounting, investor relations, and real estate functions as well as become part of the company's executive management team, which directs all aspects of company strategy, planning and operations when he starts in September 2009.

"After meeting with Mark and the rest of the team, I was thoroughly impressed with everyone's drive and sense of purpose to help people connect and share", said Ebersman in a statement.

"Mark is constantly pushing the company forward and he's assembled a world-class team that is achieving remarkable results both for its users and as a business. I'm excited to join this effort and this new industry".