Michael Seibel works at Y Combinator as a Group Partner. He joined YC in 2013 as a Part-time Partner and in 2014 as a full-time Group Partner.
He moved to the bay area in 2006, and was a co-founder and CEO of two Y Combinator startups Justin.tv/Twitch (2007 - 2011) and Socialcam (2011 - 2012). In 2012 Socialcam sold to Autodesk Inc. for $60m and in 2014, under the leadership of Emmett Shear (CEO) and Kevin Lin (COO) Twitch sold to Amazon for $970m.