Mr. Christopher Cox serves as Chief Product Officer at Facebook. Mr. Cox re-joined our company in June 2020 after his resignation as our CPO in April 2019. Christopher K. Cox has served in various positions with us since October 2005, Chief Product Officer (2014-2019 and 2020-present), Vice President, Product (2009-2014), Various other positions (2005-2009). Mr. Cox joined us as a software engineer and helped build the first versions of key Facebook features, including News Feed. Mr. Cox holds a B.S. in symbolic systems with a concentration in artificial intelligence from Stanford University.