University of California, Berkeley professor of citriculture and superintendent of the Citrus Experiment Station. Founder of Coit Agricultural Service.
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).