Physicians of Ireland Teresa Lambe, co-developer of Oxford–AstraZeneca COVID-19 vaccine Eleanor Maguire Irish neuropsychologist Julie McEnery American astrophysicist Eilis McGovern, Irish professor of cardiothoracic surgery, President of RCSI, and first female President of any Royal College of Surgeons in the world Anne Merriman British doctor, founded Hospice Africa Uganda John Monahan, bioscientist and CEO of Avigen Inc in California, a NASDAQ company Thomas E. Nevin, Irish physicist and Dean of the Faculty of Science 1963 to 1979 John James Nolan, Irish physicist and President of the Royal Irish Academy Patrick Joseph Nolan, Irish atmospheric physicist Daniel Joseph Kelly O'Connell, SJ, astronomer and seismologist, Director of Riverview and the Vatican Observatory, president of the Pontifical Academy of Sciences(1968-72), O'Connell effect named after him. Cormac O'Raifeartaigh, Irish physicist and philosopher of science David J. O'Reilly former chairman and CEO of Chevron Corporation Delia Grace Randolph Michael J. Ryan (doctor) Irish epidemiologist and former trauma surgeon Mathematics Seán Dineen, mathematician known for results in complex analysis. Thomas J. Laffey, Mathematician known for group theory and matrix theory Peter Lynch, Mathematician, meteorologist, book author and Irish Times columnist Henry Charles McWeeney, Mathematician who served as vice president of UCD from 1909 to 1935 Colm Mulcahy, Mathematician known for his chronicling of Irish mathematicians throughout history Finance and banking Patrick Honohan, Governor of the Central Bank of Ireland Politics and government Heads of state V. V. Giri, 4th President of India (did not graduate) Patrick Hillery, 6th President of Ireland Douglas Hyde, 1st President of Ireland, Professor of Irish Cearbhall Ó Dálaigh, 5th president of Ireland Heads of government John Bruton, 9th Taoiseach of Ireland John A. Costello, 2nd Taoiseach of Ireland Brian Cowen, 11th Taoiseach of Ireland Garret FitzGerald, 7th Taoiseach of Ireland Charles Haughey, 6th Taoiseach of Ireland Other Political Leaders Mairead McGuinness, European Commissioner Military Michael Beary, Irish Army Major General and Commander of UNIFIL Other Dermot Ahern Anne Anderson, Irish Ambassador to the United States David Andrews Kevin Barry Séamus Brennan Richard Bruton Joan Burton Eibhlin Byrne Mella Carroll Hazel Chu Ruth Coppinger former TD for Dublin West Patrick Costello Mary Coughlan Ryan Crocker, former United States Ambassador to Iraq; recipient of the Presidential Medal of Freedom Catherine Day, Secretary-General of the European Commission Ann Derwin, Ireland's Ambassador to China Síle de Valera Noel Dempsey Professor James Dooge, former Minister of Foreign Affairs; European Union architect; climatologist; Professor of Civil Engineering