Marcus Hirt is one of the founders of Appeal Virtual Machines, the company that created the JRockit JVM. Among other things, he is currently the project lead for JDK Mission Control. In his spare time he enjoys coding on his many pet projects, composing music, and scuba diving. Marcus has contributed Java related articles, whitepapers, tutorials, and webinars to the Java community, and has been an appreciated speaker at various conferences, such as Oracle Open World, Java One/Code One and Devoxx. He is also one of the two authors behind a popular book about JVM technology.