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).
Member of the ARPANET project, which developed an experimental computer network, a precursor to the internet. Member of the Internet Working Group (IWG), which developed TCP/IP.
Member of the ARPANET project, which developed an experimental computer network, a precursor to the internet. Director of the Stanford Computation Center and co-founder of IntelliCorp and Teknowledge.