Denis O'Sullivan was born in 1938, educated at the O'Connell Schools in Dublin and entered University College Dublin on a University Scholarship in 1957. He graduated in 1960 with a Distinction in Physics, Mathematics and Chemistry and and a Bsc(Hons) Special in Physics in 1961. He was a Scholar at the Dublin Institute for Advanced Studies (DIAS) where he undertook research in High Energy Physics under Prof Cormac O Ceallaigh and was awarded a PhD for his thesis 'The Interactions of Low Energy K-minus mesons and the Production and Decay of Hypernuclei ' by Trinity College Dublin in 1966. He has been a research physicist, Assistant Professor and Professor at DIAS, visiting lecturer and visiting Professor at the University of California at Berkeley and visiting research scientist at many institutions in the US , Europe, Russia and elsewhere. He was a visiting lecturer at Trinity College Dublin and University College Galway at periods between 1974 and 1990. Since 2005 he has been Emeritus Professor at the Dublin Institute for Advanced Studies.

He has served on research related committees of NASA, ESA, and has been an adviser to the Irish Government's Chief Scientist.

He is a Member of the Royal Irish Academy,and a Fellow of the Institute of Physics(UK).

He is author or co-author of over one hundred and forty scientific articles in international journals.

As a watercolour artist, his work has been included in exhibitions at the Royal Academy, London, The Royal Hibernian Academy, Dublin, The Royal Ulster Academy, Belfast, and the Watercolour Society of Ireland.


Married Carmel Madden in 1963

With Carmel and Professor Luke Drury and NASA friends at the International Cosmic Ray Conference in Adelaide, Australia in 1991, below

Children:Tanya(1965) and Gavin(1967), below:

Dr Tanya O'Sullivan is an archaeologist and science historian, based at Queens University, Belfast.

Gavin O'Sullivan is a musician and director/manager of classical and contemporary opera and chamber music ensembles performing in Ireland and abroad.

Grandchildren: Andrew Callum(1997) and Kirsty Iona(2000)

An Old Man's Story

A soprano member of the Vincentian Boys' Choir, Phibsborough, Dublin, which, under the direction of Fr William Hastings, recorded Palestrina's 'Sicut Cervus' for French radio in 1947.

Holder of a Dublin Cross Country Championship Team Medal (under 21) for 1958.