David Ethan Culler (born November 12, 1959) is a computer scientist and former Chair of the Department of Electrical Engineering and Computer Sciences at the University of California, Berkeley. He is a Principal Investigator in the Software Defined Buildings (SDB) project at the EECS Department at Berkeley and the Faculty Director of the i4Energy Center. His research addresses networks of small, embedded wireless devices, planetary-scale internet services, parallel computer architecture, parallel programming languages, and high performance communication. This includes TinyOS, Berkeley Motes, PlanetLab, Networks of Workstations (NOW), Internet services, Active Message, Split-C, and the Threaded Abstract Machine (TAM).