Apples lead software engineer Avadis "Avie" Tevanian will leave the company at the end of March, it was confirmed March 27. Tevanian followed Steve Jobs to Apple after the companys acquisition of NeXT in February 1997.
Initially, Tevanian served as vice president of software engineering; however, he received a promotion to chief software technology officer in 2003. No reasons were given for his departure, and Apple said he would "pursue other interests."
Tevanian played a critical role in Mac OS X development, which was based on the NeXTSTEP operating system and the Mach kernel he helped design. He holds a Ph.D. in computer sciences from Carnegie Mellon University.