Mark Leslie is an American technology executive, investor, and educator, best known for his leadership at Veritas Software Corporation, where he served as CEO from 1990 to 2002, transforming it into a leading provider of data management and storage software. Under his tenure, Veritas grew significantly, going public in 1993 and eventually being acquired by Symantec in 2005 for $13.5 billion. Prior to Veritas, Leslie held executive roles at other tech firms, including as vice president of sales at Pilot Network Services and earlier positions at NCR Corporation and Tandem Computers. After leaving Veritas, he became a prominent angel investor, backing early-stage companies in enterprise software and other tech sectors, with investments in firms like Opsware and Tellme Networks. Leslie is also an adjunct professor at Stanford Graduate School of Business, where he teaches courses on technology entrepreneurship and sales strategy, drawing from his extensive industry experience. His career has been marked by a focus on building high-performance sales organizations and fostering innovation in the software industry.