Bill Stasior joined Microsoft in 2019 as part of the Office of the CTO. Bill joined Microsoft from Apple, where he served as Vice President, AI, and led the team responsible for Siri, Apple's personal assistant. Prior to Apple, he served as the Vice President of Amazon Search and CEO of the Amazon Silicon Valley subsidiary A9.com, and before that he was the Director of Advanced Development at Alta Vista. He currently also serves as an executive advisor to Avellino Lab, which specializes in genetic diagnostics and data. Bill holds a BS, MS, and PhD in Electrical Engineering and Computer Science from M.I.T.