Mark Eugene Russinovich (born December 22, 1966) is a Spanish-born American software engineer and author who serves as CTO of Microsoft Azure.

Russinovich was born in Salamanca, Spain and was raised in Birmingham, Alabama, United States, until he was 15, when he moved with his family to Pittsburgh, Pennsylvania.

[3] In 1989, Russinovich earned his Bachelor of Science degree in computer engineering from Carnegie Mellon University, where he was a member of the Pi Kappa Alpha Beta Sigma chapter.

He later returned to Carnegie Mellon, where he received a Ph.D. in computer engineering in 1994[4] with the thesis Application-Transparent Fault Management[5] under the supervision of Zary Segall.

[6] In 1996, he and Bryce Cogswell cofounded Winternals Software, where Russinovich served as Chief Software Architect, and the web site sysinternals.com, where Russinovich wrote and published dozens of popular Windows administration and diagnostic utilities including Autoruns, Filemon, Regmon, Process Explorer, TCPView, and RootkitRevealer.

[13][14] A short story, "Operation Desolation",[15] was published just before Trojan Horse and takes place one year after the events of Zero Day.

It has a foreword by Haim Bodek, author of The Problem of HFT: Collected Writings on High Frequency Trading & Stock Market Structure Reform.