Treacy was a member of the Provisional IRA, and spent four years in Portlaoise Prison before being released under the Good Friday Agreement.
[1] He worked with a number of Sinn Féin politicians as an advisor and speechwriter, including Martin Ferris TD.
[2] Treacy studied and completed a PhD in Trinity College Dublin.
[3] Treacy has written histories of the IRA and the Communist Party of Ireland.
Treacy contributed a column to An Phoblacht, reporting on Gaelic football and hurling, and works as a freelance journalist.