Gordon Rios is a principal scientist and founding member of Pandora’s Data Science Group, where he focuses on machine learning and music recommendations. He was previously a Marie Curie Research Fellow in Cork, Ireland, after a long career in internet services. Over the course of his career, Gordon has had the privilege of working with several wonderful teams, including the soft computing group at Allstate Research & Planning Center; the pioneering data-mining startup Cogit, Inktomi, Proofpoint, Inc., Yahoo! International Search and Zvents. His principal areas of expertise and experience include programming, technical computing, optimization, data mining, information networks, research tools and machine learning, just to name a few.