Program manager and office director for the ARPANET project, which developed an experimental computer network, a precursor to the internet. Engineer and founder of Telenet, a packet data communications carrier.
Researcher for the Defense Advanced Research Projects Agency (DARPA) an agency of the government that develops technology for the military. Vice-president of engineering at the Digital Equipment Corporation (DEC).
Director of the Defense Advanced Research Projects Agency (DARPA) Information Science and Technology Office, an agency of the government that develops technology for the military. University of Southern California professor of software engineering.
Member of Project Mac, a time-sharing systems project funded by the Defense Advanced Research Projects Agency (DARPA), an agency of the government that develops technology for the military.