Marcus Hirt is one of the founders of Appeal Virtual Machines, the company that created the JRockit JVM. He is currently working in the Java product group at Oracle. He used to enjoy coding on his many pet projects, composing music, and scuba diving in his spare time; now he has toddler twins. Hirt has contributed articles, white papers, tutorials, and webinars to the Java community, and has been an appreciated speaker at various conferences. He also coauthored a book about JVM technology. He holds an MSc in computer science and engineering from the Royal Institute of Technology in Stockholm.