Mark Zbikowski

Mark Zbikowski is the CTO at SimulConsult. He is a former Microsoft Architect. He started working at Microsoft only a few years after its inception, leading efforts in MS-DOS, OS/2, Cairo and Windows NT. In 2006, he was honored for 25 years of service with Microsoft, the first employee to reach this milestone other than Bill Gates and Steve Ballmer. Mark retired from Microsoft in June 2006, has served as the CTO at startups and is currently a technical adviser to several companies. He was the designer of the DOS executable file format, used in MS-DOS executable files, and his initials are the first 2 bytes of those files.