If I remember correctly then Mark Russinovich is an Azure architect since at least 2011 and I think he had a leading role even back then. He is with Microsoft since when Sysinternals was bought in 2006.

A little off topic, but if you ever wondered what all those numbers shown by Task Manager really mean, Mark did a video[1] that really explains it well.

[1] http://channel9.msdn.com/Events/TechEd/NorthAmerica/2011/WCL...