He wrote his doctoral thesis on De Valera and the Ulster Question, and this was later published as a book. He presented 'Day by Day' on radio during the 1980s and 'Questions and Answers' on television from 1988 until it finished in 2009.
In 2009 he won a national media award for outstanding contribution to Irish media. As part of the 50th anniversary celebrations for 50 years of Irish television, he wrote the book 'Window and Mirror. RTÉ Television: 1961-2011' (2011). He currently presents the radio show 'Bowman Sunday', in which he explores recordings from the RTÉ Archives.