Darryl Havens is a Distinguished Engineer working with the Windows Core Architecture Team that is responsible for the oversight of the evolution of the Windows operating system architecture.

Havens recently returned to the company following several years of retirement. He first joined Microsoft in 1988 as one of the original team that developed the Windows NT operating system, and was the architect and implementer of the I/O system.

Havens came to Microsoft from 12 years at Digital Equipment Corporation where he worked on hardware, firmware and software, including file systems, compilers, and operating systems.