David N. Cutler, Sr. is a Technical Fellow at Microsoft. Currently responsible for the design of the 64-bit release of the Windows Operating System, Cutler is generally considered one of the top programmers worldwide. After arriving at Microsoft in 1988, he launched the Windows NT group and has since then led the development of three major releases of the product. In addition to leading the Windows 2000 team, Cutler contributed to the architecture of all parts of the system, and even wrote the kernel himself.

Before joining Microsoft, Cutler worked at DEC, where he designed and delivered several successful operating systems, including VAX/VMS, RSX-11M and VAXELN.

In recognition of his significant contributions to the field, Cutler was awarded membership in the National Academy of Engineering in 1993. Originally from Dewitt, Michigan, he holds over 20 patents and is affiliate professor in the Computer Science Department at the University of Washington.