John Delaney has resigned from his position on the UEFA Executive Committee with immediate effect.
Delaney's time on the committee was due to end at the end of 2021.
The former FAI CEO had retained his €160,000 position with the European governing body, despite ending his association with the FAI last year
In a statement confirming that Delaney is no longer involved, UEFA said: "During his time on the Executive Committee, John Delaney played a leading role in helping UEFA to achieve many things. He was instrumental in the expansion of the EURO to 24 teams, which proved such a success in 2016.
"Several teams that may not otherwise have qualified proved that they have a contribution to make on the biggest stage, with Wales' run to the semi-finals and Iceland’s elimination of England standing out as examples of this.
"He was an important figure in the move to centralise the TV rights across national team competitions – something which has benefited all UEFA member associations and which was rolled out into the new UEFA Nations League tournament."
Delaney resigned from the FAI last year after controversy surrounding a €100,000 bridging loan he made to his employer.