Paul Maritz became the president and CEO of VMware in July, after the EMC-owned company's board of directors fired co-founder and CEO Diane Greene. Maritz is now competing in the hot virtualization market against his former employer Microsoft, where he worked from 1986 to 2000 and led many of the company's major software initiatives. EMC executives put him in charge of VMware just a few months after EMC acquired Pi Corporation, a company Maritz founded. Maritz was in Las Vegas this week for VMware's annual VMworld conference, and sat down with Jon Brodkin to talk about company strategy.