Emma is currently the goalkeeper for the English team Arsenal L.F.C., and also for the Republic of Ireland womens team.
Byrne joined Arsenal in 1998 from St Patricks Athletic, and has been their first choice goalkeeper ever since. She was voted Arsenals players player of the year twice, once in 2003, and then again in 2005.
In April 2007 Byrne became a European champion with Arsenal LFC, when they beat Umeň IK of Sweden in the final of the UEFA Womens Cup by 1-0 on aggregate, a tie in which Byrne made numerous vital saves in the home and away games.
Byrne is also a key member of the Republic of Ireland womens team.