Stephen is the CTO for Teradata. He performed his graduate work in computer science at MIT where his Masters and PhD research focused on high-performance parallel processing. He also completed an MBA with joint course and thesis work at the Harvard Business School and the MIT Sloan School of Management. Stephen is a TDWI Fellow and has been on the faculty of The Data Warehousing Institute since 1996. During Barack Obama's first term he was appointed to the Presidential Council of Advisors on Science and Technology (PCAST) where he worked on development of the Big Data strategy for the US government. In 2014, at the height of the Big Data phenomenon, he was ranked by ExecRank as the #4 CTO in the USA (behind the CTOs from Amazon.com, Tesla Motors, and Intel) out of a pool of 10,000+ CTOs.