Dennis Jennings (Internet pioneer)

Dennis M. Jennings is an Irish physicist, academic, Internet pioneer, and venture capitalist. In 1985–1986 he was responsible for three critical decisions that shaped the subsequent development of NSFNET, the network that became the Internet.

Dennis Jennings holds a 1st Class honours physics BSc degree (1967) and a PhD degree (1972) obtained for a search for high-energy gamma radiation from pulsars (neutron stars), both from University College Dublin.

Jennings was the director of Computing Services at the University College Dublin from 1977 to 1999, where he was responsible for the university IT infrastructure and a staff of over 90 people. In 1986, while on leave from UCD he was interim President of the Consortium for Scientific Computing at the John von Neumann Centre (JvNC) in Princeton, New Jersey, responsible for the start-up of the supercomputer centre. He is currently (2012) Chairman of the Oversight Board of the Irish Centre for High-End Computing (ICHEC).

In 1984, the National Science Foundation (NSF) began construction of several regional supercomputing centres to provide very high-speed computing resources for the US research community. In 1985 NSF hired Jennings as its first Program Director for Networking to lead the establishment of the National Science Foundation Network (NSFNET) to provide access to the five NSF super-computing centres and to enable sharing of resources and information. Jennings made three critical decisions that shaped the subsequent development of NSFNET:

Jennings was also actively involved in the start-up of research networks in Europe (European Academic Research Network, EARN – President; EBONE – Board member) and Ireland (HEAnet – initial proposal and later Board member). He chaired the Board and General Assembly of the Council of European National Top Level Domain Registries (CENTR) from 1999 to early 2001 and was actively involved in the start-up of the Internet Corporation for Assigned Names and Numbers (ICANN). He was a member of the ICANN Board from 2007 to 2010, serving as vice-chair in 2009–2010.

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