A publican from Navan, County Meath, he was educated at St. Patrick's Classical School in Navan. Fitzsimons was elected to the 21st Dáil as a Fianna Fáil Teachta Dála (TD) for the Meath constituency on his first attempt at the 1977 general election, and re-elected until retiring at the 1987 general election to concentrate on his European Parliament seat. He was succeeded in the Dáil by Noel Dempsey.
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