Sinofsky, Steven, 1965-

Steven Jay Sinofsky (born 1965) is an American businessman, investor and software engineer. He served as president of the Windows Division at Microsoft from July 2009 until his resignation on November 13, 2012. In 1998 and in 2013, Sinofsky was a visiting scholar at Harvard Business School where he worked with students enrolled in a second year class on technology product development taught by Marco Iansiti and Stefan Thomke. As of 2012, Sinofsky is a board partner at Andreessen Horowitz, where he serves on boards of investments.