Prior to HBO, Berkes spent 18 years at Microsoft. He is one of the four original founders of Xbox. He held a number of senior level positions at Microsoft, including senior software developer, partner-level architect and general manager. His responsibilities at Microsoft included leading the DirectX and OpenGL graphics technology development organisations in Windows, developing mobile architectures and user interfaces in Microsoft Research, and driving advanced development while reporting to Microsoft chief software architect Ray Ozzie. Early in his career, Berkes served as a senior developer at both Autodesk and Vermont Microsystems.
Berkes earned a bachelor’s degree in physics from Middlebury College in Vermont and a master’s degree in computer science and electrical engineering from the University of Vermont. He holds seven patents spanning design, user interaction and core computing.